Mohammad Monirul Hasan Tipu | Bangladesh Agricultural Research Institute (BARI) (original) (raw)

Papers by Mohammad Monirul Hasan Tipu

Agricultural Development in Asia: Potential Use of Nano-Materials and Nano-Technology [Working Title]

Most of the early uses of nanotechnology have come from material sciences, although applications ... more Most of the early uses of nanotechnology have come from material sciences, although applications in agriculture are still expanding. Due to a few comprehensive reviews, we described application of nanomaterials along with their fate in soil and interaction with soil and plant system. From synthesis to metabolism, nano-fertilizers like zinc, silver, selenium, titanium oxide have enhanced the physio-chemical characteristics of crop plants in every manner conceivable. On the other hand, it has the potential to minimize pesticide use by boosting reactivity and surface area of nanoparticles. Nanotechnology in pesticides will, without a doubt, replace the current way of pesticide application because of its efficacy. Nano-based approaches can readily overcome the constraints of conventional soil remediation technologies. While soil nanomaterials mobility has been investigated in a limited number of research studies, it’s likely the most critical gap in knowing the real risk of their transp...

Black soldier fly larvae (BSFL) meal-based diet is an innovative strategy for sustainable 24 aqua... more Black soldier fly larvae (BSFL) meal-based diet is an innovative strategy for sustainable 24 aquaculture. In the present study, black soldier fly larvae meal has shown a promising 25 alternative as a fish meal (FM) replacement in diets for common carp fry. Black soldier fly 26 larvae; a protein, fat and minerals containing non-pest insect, when used as fish feed ingredient 27 minimize feed cost, boost up fish production and tackle environmental hazards. Five feeds were 28 formulated where fish meal was replaced by BSF larvae for nursing of common carp fry. Feeds 29 were prepared by 100 (T1), 75 (T2), 50 (T3), 25 (T4) and 0% (T5) replacement of fish meal with 30 BSF larvae as a protein and minerals supplement. Among the feeds T3 performed better than 31 T1. Most of the common carp fry were healthy and robust in treatment T1 and T3 where %weight 32 gain was 417.70% and 427.95%, respectively. The lower feed conversion ratio (FCR) was also 33 obtained in treatment T1 (3.54) and T3 (3.42...

Journal Clean WAS, 2020

The experiment was conducted at the charland area of Jamalpur during rabi 2019 to know the suitab... more The experiment was conducted at the charland area of Jamalpur during rabi 2019 to know the suitable foxtail millet line/verity for water stress and increase production area of char land. Treatments included in the experiment were: ten different lines and one variety (BARI Kaon-1). T1 = RC-170, T2 = BD-869, T3= BD-954, T4= BD-972, T5= BD-998, T6= BD-1062, T7= BD-1075, T8= BD-1083, T9= BD-1086, T10= BD-1108 and T11= BARI Kaon-1. Considering some plant physiological and yield contributing characters such as effective tiller per hill, panicle length, days to harvest, root length, 1000 seed weight and yield all the foxtail millet lines/ varieties may be grown in rainfed condition especially in char land area.

Nippon Journal of Environmental Science, 2021

The study was aimed to examine whether a strip-tillage system with residue retention can minimize... more The study was aimed to examine whether a strip-tillage system with residue retention can minimize nitrogen requirements for wheat and mungbean crops. There were two tillage systems-conventional tillage and strip tillage, two residue levels-20% and 40% retention of the previous crop residues and five N rates-60% of recommended fertilizer dose (RFD), 80% RFD, 100% RFD, 120% RFD and 140% RFD. For wheat, the 40% residue retention produced 2.37 t ha-1 grain yield and the 20% residue retention demonstrated 2.05 t ha-1. The highest grain yield being observed at 120% N application and the lowest yield at 60% N addition. For mungbean, the grain yield obtained for conventional tillage was 0.80 t ha-1 and for strip-tillage was 0.94 t ha-1. Residue retention i.e. 40% residue retention showed higher yield (0.90 t ha-1) compared to 20% residue retention (0.84 t ha-1). The highest seed yield being observed at 140% N application and the lowest yield at 60% N addition. The interaction effect of residue retention and nitrogen on the seed yield was not significant. For wheat, the highest rate of N application (140 kg N ha-1) under conventional tillage had the highest seed N concentration (2.08%). For mungbean, the grain N concentration only varied between two tillage systems and for two interactions such as tillage with different N rates and residue retention with different N rates. The contribution of strip tillage and higher residue retention immobilized N and increased the fertilizer N requirement.

Journal Clean WAS, 2020

The experiment was conducted at Regional Agricultural Research Station (RARS), Jamalpur, Banglade... more The experiment was conducted at Regional Agricultural Research Station (RARS), Jamalpur, Bangladesh during the period of 2017-18 and 2018-19 with the objectives to evaluate the effect of different mulch on soil temperature, soil moisture conservation and yield attributes of chilli. There were five treatments comprising T1: no mulch, T2: rice straw mulch @ 5 t ha-1 , T3: water hyacinth mulch @ 5 t ha-1 , T4: black polyethylene mulch and T5: white polyethylene mulch. The results revealed that, all the mulch treatment had higher soil temperature and soil moisture content at 5 cm and 10 cm depth compared to no mulch treatment. Soil temperature was highest in black polyethylene mulch, it increased average soil temperature by about 5.7 o C at 5 cm depth and 5.1 o C at 10 cm depth compared to no mulch treatment at 120 Days. Rice straw mulch treatment recorded highest soil moisture, it increased average soil moisture about 27.87 % at 5 cm depth and 28.57% at 10 cm depth over no mulch treatment. Rice straw mulch treatment produced highest green chilli yield (8.81 t ha-1) which was 26.94 % increased over no mulch treatment (6.94 t ha-1).Considering economic analysis, highest gross return (Tk 352400 ha-1), gross margin (Tk 235400 ha-1) and BCR (3.01) was obtained from same treatment T2 i.e., rice straw mulch treatment.

Azarian Journal of Agriculture, 2020

Six exotic potato genotypes named Actrice, Cereza, Margarita, Messi, Picobella, and Sunred, along... more Six exotic potato genotypes named Actrice, Cereza, Margarita, Messi, Picobella, and Sunred, along with four check varieties, were evaluated at different locations (agro-ecological region) of Bangladesh in three consecutive years, 2016-17 to 2018-19 respectively to find out some stable genotypes for commercial cultivation in Bangladesh. Combined analysis of variance showed a highly significant difference among the genotypes, locations, and GEI for all the characters studied. None of the genotypes were found suitable for early harvesting (65 DAP), but when the full maturity was considered, significant variations were found for different tuber qualities and yield. During the third year, the mean highest yield was observed in Sunred (39.86 t ha-1), closely followed by Margarita (37.57 t ha-1). All the tested genotypes yielded more than 30 t ha-1 and were better than the checks. Dry matter content was the highest in the check variety Lady Rosetta (20.09%). None of the tested genotypes were better than the check varieties in dry matter content, quite unsuitable for processing. Sunred produced a very large-sized uniform and smooth tubers with a medium-high dry matter. If its dry matter content can be increased by 2-3% giving intensive agronomic management, this variety may be suitable for French Fry production. All the exotic genotypes were suitable as table potatoes. Picobella was the most stable, but the average yield is low. Considering the yield and other qualities, Sunred, Margarita, Cereza and Actrice may be further evaluated in large plots for commercial cultivation before releasing as variety.

Plant Science Today, 2021

Brinjal and tomato, both of these Solanaceous crops, suffer from different diseases based on thei... more Brinjal and tomato, both of these Solanaceous crops, suffer from different diseases based on their surrounding environment. In charland ecosystem, due to the current trend of climate change these two crops have become vulnerable to disease infection. A comprehensive survey was conducted in Jamalpur and Sherpur districts to measure the severity of major diseases of brinjal and tomato in this region during the rabi season of 2018-19. This survey was based on farmers' fields targeting 10 different locations where brinjal and tomato were grown extensively. Data were collected from randomly selected farmer's vegetable fields where incidence and severity were recorded. Through the survey, five (5) diseases based on their incidence and severity were categorized as major diseases in studied areas. Bacterial wilt of brinjal (60%) and viral disease of tomato (41.67%) were found to be higher in incidence. This was a major limiting factor for decreasing total brinjal and tomato production in the charland of Jamalpur and Sherpur. Wilting of tomato (20%), viral disease of brinjal (20%) and phomopsis blight of brinjal (13.33%) were medium in incidence at different locations. Farmers of these areas found these diseases to be a serious threat to future cultivation and expansion of brinjal and tomato in charland.

Physiological and Molecular Plant Pathology, 2020

Citrus greening or Huanglongbing (HLB) is one of the most severe diseases of citrus worldwide and... more Citrus greening or Huanglongbing (HLB) is one of the most severe diseases of citrus worldwide and no cure is available at present. Currently molecular techniques based on polymerase chain reaction (PCR) are mainly used for the identification of HLB disease. The aim of this study was to identify the causal pathogen of citrus greening disease in Bangladesh. A total of eight mandarin orange leaf samples from three citrus growing areas viz. Moulvibazar, Sylhet and Khagrachari were collected on the basis of visual investigation demonstrating blotchy mottle symptoms. The genomic DNA was extracted from midribs of each leaf sample and subjected to the PCR. Species specific primers A2/J5 was used to amplify a partial sequence of β-operon (rplKAJL-rpoBC operon) of ribosomal protein gene. An amplicon size of 703 bp specific to the Candidatus Liberibacter asiaticus confirmed its presence. BLAST homology search with the sequenced data showed 99% identity with the sequence database of Candidatus Liberibacter asiaticus deposited in GenBank. These results confirmed the prevalence of Candidatus Liberibacter asiaticus causing citrus greening in Bangladesh.

Archives of Agriculture and Environmental Science, 2020

Huanglongbing (HLB) or citrus greening is the most economically devastating disease of citrus in ... more Huanglongbing (HLB) or citrus greening is the most economically devastating disease of citrus in the world. HLB is a vector-borne disease and transmitted by Asian Citrus psyllid (ACP). HLB is now a serious threat to the cultivation and expansion of Sweet orange and Mandarin in Bangladesh. As no suitable cure is available against the disease, inducing plant immunity by chemical inducers or nutrient management and intercropping could be an effective way to combat this challenge. In this study, two inducers viz., Bion (Acibenzolar S-methyl) and Bactroban (Bismerthizol), nutrients formulations SICOGREEN® (soil application) and foliar spray, intercropping with guava, spraying guava leaf extract (10%), foliar spray with insect growth regulators (IGR) such as Heron (Lufenuron), insecticides such as Neonicotinoids/ Imidachloropid + Thiomethoxam and foliar spray of Beauveria bassiana (Commercial formulation) showed comparatively better performance as compared to untreated control considering both HLB incidence and severity in both locations (Haluaghat and Bhaluka) of Sweet orange orchards. All these treatments reduced HLB incidence by 57.5 to 89.44% and HLB severity by 54.16 to 80.35% in Sweet orange considering both Haluaghat and Bhaluka orchards. The results revealed that Bion (Acibenzolar S-methyl), nutrients formulations SICOGREEN® (soil and foliar application), intercropping with guava, spraying guava leaf extract, foliar spray of insecticides can be integrated to reduce HLB incidence and severity in Sweet orange. Some of these treatments have also some positive effects on plant growth and yield parameters of Sweet orange as compared to control. These results comprehensively suggest that chemical inducers and nutrient management seem a better alternative to control HLB aimed to increase tree lifespan and productivity. Keywords Disease control Integrated approach Huanglongbing Sweet orange Citation of this article: Islam, M.R., Islam, M.N., Alam, M.Z., Hossain, M.M., Hussen, M.A.M. and Tipu, M.M.H. (2020). Chemical inducers, nutrient management, guava intercropping and insecticides can reduce huanglongbing incidence and severity in Sweet orange.

International Journal of Sustainable Crop Production, 2018

The study was conducted at Regional Agricultural Research Station, Jamalpur during 2014-2015 to f... more The study was conducted at Regional Agricultural Research Station, Jamalpur during 2014-2015 to find out resistant or tolerant cultivars against late blight of potato caused by Phytopththora infestans. Seeds of a total 56 cultivars were sown under natural epiphytotic condition. Out of fifty six germplasm 16 germplasm were found highly susceptible and thirty two germplasm were susceptible against P. infestans. Four varieties were moderately resistant. The variety LB-6 was found resistant to late blight. Germplasm Sarpo Mira, Bionica and LB-7 were found highly resistant against P. infestans that can be used in breeding programme for the development of late blight resistant potato variety.

Asian Journal of Agricultural Extension, Economics & Sociology, Sep 19, 2020

The study aimed to identify the profitability of mustard variety and was conducted in three Binas... more The study aimed to identify the profitability of mustard variety and was conducted in three Binasarisha-9 growing areas of Bangladesh, namely Mymensingh, Sherpur and Ranpur district. In total, data were collected from randomly selected 180 farmers, 60 farmers from each area. Survey was conducted in sadar, Gouripur and Nalitabari Upazila of Rangpur, Mymensingh, and Sherpur district, respectively. From each areas 30 farmers was adopters and 30 was non-adopters. In the sampled areas data were collected through pre-designed interview schedule from January-March, 2019. Tabular, descriptive statistics and logit model were used to fulfill objectives.The study ascertains that mustard production is profitable. The average per hector net return was Tk. 22278.34 and profitability ratio was 1.50. Thirteen explanatory variables were performed in logit regression analysis in this study. The result of logit regression model shows that experience of household head, farm size, annual income, yield, training, and extension contact were found as positively significant and earning person, duration and weather were found as negatively significant variables in explaining the variation in Binasarisha-9 adoption of farm households. The major constraints were: About 20% mentioned about lack of training facilities and was top ranked followed by quality seed in timely (13.33%), infestation of disease (11.11%), and other (9.99%) were found among the mustard growers.

International Journal of Agronomy and Agricultural Research, 2018

An experiment was conducted at the Regional Agricultural Research Station, Jamalpur during the ra... more An experiment was conducted at the Regional Agricultural Research Station, Jamalpur during the rabi season of 2014-2015 to find out suitable sowing date of sweet corn as an intercrop with potato, to grow easily two crops in the charland farmers and to find out agro-economic performance of potato + sweet corn intercropping. Six treatments viz., simultaneous sowing of potato and sweet corn, sweet corn sown at 10 days after potato planting (DAPP), sweet corn sown at 20 DAPP, sweet corn sown at 30 DAPP, sole potato and sole sweet corn were tested in this study. Highest potato yield was obtained from sole potato treatment (27.4 t ha-1) which was similar to simultaneous sowing of potato and sweet corn (26.7 t ha-1) and sweet corn sown after 20 days of potato planting (26.7tha-1). Potato equivalent yield (PEY) (38.4 t ha-1)highest gross return Tk. 460350 ha-1 , gross margin Tk. 351391 ha-1 and benefit cost ratio 4.23 was observed from simultaneous sowing of potato and sweet corn (T1). The result indicated that simultaneous sowing of potato with sweet corn (T1) best performed in potato yield, sweet corn yield, gross return BCR and PEY compared with the other treatments.

Journal of Plant Pathology, Jan 2017

Citrus huanglongbing (greening) is one of the important diseases of citrus in Asia (Bové, 2006). ... more Citrus huanglongbing (greening) is one of the important diseases of citrus in Asia (Bové, 2006). The symptoms include blotchy chlorosis and/or mottling of the leaves, stunted growth, poor root growth, small, green, and malformed fruits and decline of the trees. The disease is caused by the phloem-limited unculturable fastidious bacteria Candida-tus Liberibacter asiaticus (CLas), Ca. L. africanus (CLaf), and Ca. L. americanus (CLam) (Bové, 2006; Jagoueix et al., 1994). Among them CLas is the most widespread (e.g., Asia, Brazil and North America). In recent years the presence of huanglongbing was suspected in different regions of Bangladesh. To establish whether this is the case, in July, 2016 symptomatic plant samples of Citrus sinensis were collected from four citrus-growing areas of the country: Jaintapur (Sylhet), Akbarpur (Moulvibazar), Dighinala (Khagrachari) and Hathazari (Chittagong). The samples were analyzed by polymerase PCR using the ‘CLas’ specific primers A2 (5’-TATA A AGGTTGACCTTTCGAGTTT-3’) and J5 (5’-ACA A A AGCAGA A ATAGCACGA ACA A-3’) which amplify a partial sequence of the β-operon (rplKAJL-rpoBC operon) of ribosomal protein genes (Hocquellet et al., 1999). A product 703 bp in size specific to Ca. L. asiaticus was amplified, sequenced and deposited in GenBank (accession No. KX826950). The nucleotide sequence of the recovered CLas shared 100% sequence identity with other Ca. L. asiaticus strains from NCBI database (e.g. KC477384, KT164844, KC133065). To our knowledge this is the first molecular-based detection of Candidatus Liberibacter asiaticus infecting Citrus sinensis in Bangladesh.

. Journal of Bioscience and Agriculture Research, 2016

The experiment was conducted to find out the effect of different sources of nutrient and hormones... more The experiment was conducted to find out the effect of different sources of nutrient and hormones on the growth and yield of tomato. The study consisted of Factor A: different nutrient sources viz. N0: Control; N1: Cowdung (60 tha-1); N2: Vermicompost (7 tha-1) and N3: Recommended dose (10 ton Cowdung + 550 kg Urea + 450 kg TSP + 250 kg MPha-1) and Factor B: different hormones viz. H0: Control; H1: NAA (30 ppm) and H2: GA3 (30 ppm). The minimum days (32d) required from transplanting to 1 st flowering from N3H2 and the maximum (39d) was needed from N0H0. The treatment N3H2 performed better than other treatments and produced maximum (59.11) number of fruits per plant, maximum (95.82 g) weight of individual fruit and maximum (83.87 ton) yield per hectare. Treatment combination, N3H2, enhanced fruit production by about three times over control (20 fruits plant-1) and individual fruit weight by 1.6 times compared to control (59 g plant-1) resulting maximum fruit yield (83.87t ha-1) which is 2.4 times higher than that of control, N0H0. It appears that the recommended fertilizer dose along with GA3 application may be recommended for tomato production.

Research & Reviews: Journal of Crop Science and Technology, 2015

Thirty five groundwater samples were collected to appraise the chemical constituents in order to ... more Thirty five groundwater samples were collected to appraise the chemical constituents in order to classify them on the basis of their suitability for irrigation and drinking. The considered water quality parameters are pH, EC, TDS, calcium, magnesium, sodium, potassium, iron, manganese, boron, sulphate, bicarbonate, chloride, sodium adsorption ratio, residual sodium carbonate, soluble sodium percentage,Kelly’s ratio, magnesium percentage and hardness. All the water samples were neutral to slightly alkaline in nature (pH=6.97 to 7.62). As regards to TDS values, groundwater samples wererated as fresh water (TDS<1000mgL-1) in quality. EC and SAR indicated that water samples were medium salinity (C2) and low alkalinity (S1) hazards expressed as C2S1and could be safely used for moderate salt tolerance crops growing on soils. Groundwatersamples were classified as good and permissible in quality based on SSP. All groundwater samples were free from RSC and belonged to suitable in category. As per hardness (HT), samples were moderately hard tohard in quality. The detected concentrations ofdifferent cations and anions were found below the toxic levels and might not pose threat to soil system as irrigation waterand could be used for drinking. In most of the groundwater samples, HCO3 ion was within the safe limit but only in four samples HCO3 ion was considered as toxicant for irrigating soils and crops. The toxicity of Mn ion was detected in two samples and the rest of the water samples were suitable for irrigation.

Research & Reviews: Journal of Crop Science and Technology, 2015

Weeds are always a disturbing pest in crop field. The success of cultivation mainly depends on pr... more Weeds are always a disturbing pest in crop field. The success of cultivation mainly depends on proper management of weeds through different approaches. The study was conducted in boro (dry) season during the period from November 2010 to May 2011 to investigate effect of row direction and weeding regime on growth and yield of rice. The experiment was consisted of ten weeding regimes and two row directions. Almost all growth parameters, crop characters and yield parameters were influenced significantly due to weeding regimes and row directions. Weeding at 15 days interval was found to produce the tallest plant (88.70 cm), the greatest number of tiller hill-1 (14.79) and the longest panicle (23.87 cm) under East-West row direction. The highest amount of total dry matter production (63.88 g) was found from weeding at 15 days interval and East-West row direction at 60 days after transplanting. Grain yield (4.46 t ha-1) was 130% higher with weeding at 15 days interval over no weeding under East-West row direction. East-West row direction also produced 46% higher straw yield (5.06 t ha-1) from weeding at 15 days interval over no weeding.

Research & Reviews: Journal of Agricultural Science and Technology, 2014

A field experiment was conducted at the Regional Agricultural Research Station, Hathazari, Chitta... more A field experiment was conducted at the Regional Agricultural Research Station, Hathazari, Chittagong to study the effect of different mulch materials on the yield and quality of tomato. rice husk mulch was found superior to sawdust, garden leaves and black polyethylene mulch in producing higher yield of tomato. Higher number of fruits per plant and maximum yield was recorded with rice husk which was 17.93% higher than the control (without mulch). BARI Tomato 14 in combination with rice husk produced highest yield (79.74 t/ha) highest TSS (6.67).

Agricultural Development in Asia: Potential Use of Nano-Materials and Nano-Technology [Working Title]

Most of the early uses of nanotechnology have come from material sciences, although applications ... more Most of the early uses of nanotechnology have come from material sciences, although applications in agriculture are still expanding. Due to a few comprehensive reviews, we described application of nanomaterials along with their fate in soil and interaction with soil and plant system. From synthesis to metabolism, nano-fertilizers like zinc, silver, selenium, titanium oxide have enhanced the physio-chemical characteristics of crop plants in every manner conceivable. On the other hand, it has the potential to minimize pesticide use by boosting reactivity and surface area of nanoparticles. Nanotechnology in pesticides will, without a doubt, replace the current way of pesticide application because of its efficacy. Nano-based approaches can readily overcome the constraints of conventional soil remediation technologies. While soil nanomaterials mobility has been investigated in a limited number of research studies, it’s likely the most critical gap in knowing the real risk of their transp...

Black soldier fly larvae (BSFL) meal-based diet is an innovative strategy for sustainable 24 aqua... more Black soldier fly larvae (BSFL) meal-based diet is an innovative strategy for sustainable 24 aquaculture. In the present study, black soldier fly larvae meal has shown a promising 25 alternative as a fish meal (FM) replacement in diets for common carp fry. Black soldier fly 26 larvae; a protein, fat and minerals containing non-pest insect, when used as fish feed ingredient 27 minimize feed cost, boost up fish production and tackle environmental hazards. Five feeds were 28 formulated where fish meal was replaced by BSF larvae for nursing of common carp fry. Feeds 29 were prepared by 100 (T1), 75 (T2), 50 (T3), 25 (T4) and 0% (T5) replacement of fish meal with 30 BSF larvae as a protein and minerals supplement. Among the feeds T3 performed better than 31 T1. Most of the common carp fry were healthy and robust in treatment T1 and T3 where %weight 32 gain was 417.70% and 427.95%, respectively. The lower feed conversion ratio (FCR) was also 33 obtained in treatment T1 (3.54) and T3 (3.42...

Journal Clean WAS, 2020

The experiment was conducted at the charland area of Jamalpur during rabi 2019 to know the suitab... more The experiment was conducted at the charland area of Jamalpur during rabi 2019 to know the suitable foxtail millet line/verity for water stress and increase production area of char land. Treatments included in the experiment were: ten different lines and one variety (BARI Kaon-1). T1 = RC-170, T2 = BD-869, T3= BD-954, T4= BD-972, T5= BD-998, T6= BD-1062, T7= BD-1075, T8= BD-1083, T9= BD-1086, T10= BD-1108 and T11= BARI Kaon-1. Considering some plant physiological and yield contributing characters such as effective tiller per hill, panicle length, days to harvest, root length, 1000 seed weight and yield all the foxtail millet lines/ varieties may be grown in rainfed condition especially in char land area.

Nippon Journal of Environmental Science, 2021

The study was aimed to examine whether a strip-tillage system with residue retention can minimize... more The study was aimed to examine whether a strip-tillage system with residue retention can minimize nitrogen requirements for wheat and mungbean crops. There were two tillage systems-conventional tillage and strip tillage, two residue levels-20% and 40% retention of the previous crop residues and five N rates-60% of recommended fertilizer dose (RFD), 80% RFD, 100% RFD, 120% RFD and 140% RFD. For wheat, the 40% residue retention produced 2.37 t ha-1 grain yield and the 20% residue retention demonstrated 2.05 t ha-1. The highest grain yield being observed at 120% N application and the lowest yield at 60% N addition. For mungbean, the grain yield obtained for conventional tillage was 0.80 t ha-1 and for strip-tillage was 0.94 t ha-1. Residue retention i.e. 40% residue retention showed higher yield (0.90 t ha-1) compared to 20% residue retention (0.84 t ha-1). The highest seed yield being observed at 140% N application and the lowest yield at 60% N addition. The interaction effect of residue retention and nitrogen on the seed yield was not significant. For wheat, the highest rate of N application (140 kg N ha-1) under conventional tillage had the highest seed N concentration (2.08%). For mungbean, the grain N concentration only varied between two tillage systems and for two interactions such as tillage with different N rates and residue retention with different N rates. The contribution of strip tillage and higher residue retention immobilized N and increased the fertilizer N requirement.

Journal Clean WAS, 2020

The experiment was conducted at Regional Agricultural Research Station (RARS), Jamalpur, Banglade... more The experiment was conducted at Regional Agricultural Research Station (RARS), Jamalpur, Bangladesh during the period of 2017-18 and 2018-19 with the objectives to evaluate the effect of different mulch on soil temperature, soil moisture conservation and yield attributes of chilli. There were five treatments comprising T1: no mulch, T2: rice straw mulch @ 5 t ha-1 , T3: water hyacinth mulch @ 5 t ha-1 , T4: black polyethylene mulch and T5: white polyethylene mulch. The results revealed that, all the mulch treatment had higher soil temperature and soil moisture content at 5 cm and 10 cm depth compared to no mulch treatment. Soil temperature was highest in black polyethylene mulch, it increased average soil temperature by about 5.7 o C at 5 cm depth and 5.1 o C at 10 cm depth compared to no mulch treatment at 120 Days. Rice straw mulch treatment recorded highest soil moisture, it increased average soil moisture about 27.87 % at 5 cm depth and 28.57% at 10 cm depth over no mulch treatment. Rice straw mulch treatment produced highest green chilli yield (8.81 t ha-1) which was 26.94 % increased over no mulch treatment (6.94 t ha-1).Considering economic analysis, highest gross return (Tk 352400 ha-1), gross margin (Tk 235400 ha-1) and BCR (3.01) was obtained from same treatment T2 i.e., rice straw mulch treatment.

Azarian Journal of Agriculture, 2020

Six exotic potato genotypes named Actrice, Cereza, Margarita, Messi, Picobella, and Sunred, along... more Six exotic potato genotypes named Actrice, Cereza, Margarita, Messi, Picobella, and Sunred, along with four check varieties, were evaluated at different locations (agro-ecological region) of Bangladesh in three consecutive years, 2016-17 to 2018-19 respectively to find out some stable genotypes for commercial cultivation in Bangladesh. Combined analysis of variance showed a highly significant difference among the genotypes, locations, and GEI for all the characters studied. None of the genotypes were found suitable for early harvesting (65 DAP), but when the full maturity was considered, significant variations were found for different tuber qualities and yield. During the third year, the mean highest yield was observed in Sunred (39.86 t ha-1), closely followed by Margarita (37.57 t ha-1). All the tested genotypes yielded more than 30 t ha-1 and were better than the checks. Dry matter content was the highest in the check variety Lady Rosetta (20.09%). None of the tested genotypes were better than the check varieties in dry matter content, quite unsuitable for processing. Sunred produced a very large-sized uniform and smooth tubers with a medium-high dry matter. If its dry matter content can be increased by 2-3% giving intensive agronomic management, this variety may be suitable for French Fry production. All the exotic genotypes were suitable as table potatoes. Picobella was the most stable, but the average yield is low. Considering the yield and other qualities, Sunred, Margarita, Cereza and Actrice may be further evaluated in large plots for commercial cultivation before releasing as variety.

Plant Science Today, 2021

Brinjal and tomato, both of these Solanaceous crops, suffer from different diseases based on thei... more Brinjal and tomato, both of these Solanaceous crops, suffer from different diseases based on their surrounding environment. In charland ecosystem, due to the current trend of climate change these two crops have become vulnerable to disease infection. A comprehensive survey was conducted in Jamalpur and Sherpur districts to measure the severity of major diseases of brinjal and tomato in this region during the rabi season of 2018-19. This survey was based on farmers' fields targeting 10 different locations where brinjal and tomato were grown extensively. Data were collected from randomly selected farmer's vegetable fields where incidence and severity were recorded. Through the survey, five (5) diseases based on their incidence and severity were categorized as major diseases in studied areas. Bacterial wilt of brinjal (60%) and viral disease of tomato (41.67%) were found to be higher in incidence. This was a major limiting factor for decreasing total brinjal and tomato production in the charland of Jamalpur and Sherpur. Wilting of tomato (20%), viral disease of brinjal (20%) and phomopsis blight of brinjal (13.33%) were medium in incidence at different locations. Farmers of these areas found these diseases to be a serious threat to future cultivation and expansion of brinjal and tomato in charland.

Physiological and Molecular Plant Pathology, 2020

Citrus greening or Huanglongbing (HLB) is one of the most severe diseases of citrus worldwide and... more Citrus greening or Huanglongbing (HLB) is one of the most severe diseases of citrus worldwide and no cure is available at present. Currently molecular techniques based on polymerase chain reaction (PCR) are mainly used for the identification of HLB disease. The aim of this study was to identify the causal pathogen of citrus greening disease in Bangladesh. A total of eight mandarin orange leaf samples from three citrus growing areas viz. Moulvibazar, Sylhet and Khagrachari were collected on the basis of visual investigation demonstrating blotchy mottle symptoms. The genomic DNA was extracted from midribs of each leaf sample and subjected to the PCR. Species specific primers A2/J5 was used to amplify a partial sequence of β-operon (rplKAJL-rpoBC operon) of ribosomal protein gene. An amplicon size of 703 bp specific to the Candidatus Liberibacter asiaticus confirmed its presence. BLAST homology search with the sequenced data showed 99% identity with the sequence database of Candidatus Liberibacter asiaticus deposited in GenBank. These results confirmed the prevalence of Candidatus Liberibacter asiaticus causing citrus greening in Bangladesh.

Archives of Agriculture and Environmental Science, 2020

Huanglongbing (HLB) or citrus greening is the most economically devastating disease of citrus in ... more Huanglongbing (HLB) or citrus greening is the most economically devastating disease of citrus in the world. HLB is a vector-borne disease and transmitted by Asian Citrus psyllid (ACP). HLB is now a serious threat to the cultivation and expansion of Sweet orange and Mandarin in Bangladesh. As no suitable cure is available against the disease, inducing plant immunity by chemical inducers or nutrient management and intercropping could be an effective way to combat this challenge. In this study, two inducers viz., Bion (Acibenzolar S-methyl) and Bactroban (Bismerthizol), nutrients formulations SICOGREEN® (soil application) and foliar spray, intercropping with guava, spraying guava leaf extract (10%), foliar spray with insect growth regulators (IGR) such as Heron (Lufenuron), insecticides such as Neonicotinoids/ Imidachloropid + Thiomethoxam and foliar spray of Beauveria bassiana (Commercial formulation) showed comparatively better performance as compared to untreated control considering both HLB incidence and severity in both locations (Haluaghat and Bhaluka) of Sweet orange orchards. All these treatments reduced HLB incidence by 57.5 to 89.44% and HLB severity by 54.16 to 80.35% in Sweet orange considering both Haluaghat and Bhaluka orchards. The results revealed that Bion (Acibenzolar S-methyl), nutrients formulations SICOGREEN® (soil and foliar application), intercropping with guava, spraying guava leaf extract, foliar spray of insecticides can be integrated to reduce HLB incidence and severity in Sweet orange. Some of these treatments have also some positive effects on plant growth and yield parameters of Sweet orange as compared to control. These results comprehensively suggest that chemical inducers and nutrient management seem a better alternative to control HLB aimed to increase tree lifespan and productivity. Keywords Disease control Integrated approach Huanglongbing Sweet orange Citation of this article: Islam, M.R., Islam, M.N., Alam, M.Z., Hossain, M.M., Hussen, M.A.M. and Tipu, M.M.H. (2020). Chemical inducers, nutrient management, guava intercropping and insecticides can reduce huanglongbing incidence and severity in Sweet orange.

International Journal of Sustainable Crop Production, 2018

The study was conducted at Regional Agricultural Research Station, Jamalpur during 2014-2015 to f... more The study was conducted at Regional Agricultural Research Station, Jamalpur during 2014-2015 to find out resistant or tolerant cultivars against late blight of potato caused by Phytopththora infestans. Seeds of a total 56 cultivars were sown under natural epiphytotic condition. Out of fifty six germplasm 16 germplasm were found highly susceptible and thirty two germplasm were susceptible against P. infestans. Four varieties were moderately resistant. The variety LB-6 was found resistant to late blight. Germplasm Sarpo Mira, Bionica and LB-7 were found highly resistant against P. infestans that can be used in breeding programme for the development of late blight resistant potato variety.

Asian Journal of Agricultural Extension, Economics & Sociology, Sep 19, 2020

The study aimed to identify the profitability of mustard variety and was conducted in three Binas... more The study aimed to identify the profitability of mustard variety and was conducted in three Binasarisha-9 growing areas of Bangladesh, namely Mymensingh, Sherpur and Ranpur district. In total, data were collected from randomly selected 180 farmers, 60 farmers from each area. Survey was conducted in sadar, Gouripur and Nalitabari Upazila of Rangpur, Mymensingh, and Sherpur district, respectively. From each areas 30 farmers was adopters and 30 was non-adopters. In the sampled areas data were collected through pre-designed interview schedule from January-March, 2019. Tabular, descriptive statistics and logit model were used to fulfill objectives.The study ascertains that mustard production is profitable. The average per hector net return was Tk. 22278.34 and profitability ratio was 1.50. Thirteen explanatory variables were performed in logit regression analysis in this study. The result of logit regression model shows that experience of household head, farm size, annual income, yield, training, and extension contact were found as positively significant and earning person, duration and weather were found as negatively significant variables in explaining the variation in Binasarisha-9 adoption of farm households. The major constraints were: About 20% mentioned about lack of training facilities and was top ranked followed by quality seed in timely (13.33%), infestation of disease (11.11%), and other (9.99%) were found among the mustard growers.

International Journal of Agronomy and Agricultural Research, 2018

An experiment was conducted at the Regional Agricultural Research Station, Jamalpur during the ra... more An experiment was conducted at the Regional Agricultural Research Station, Jamalpur during the rabi season of 2014-2015 to find out suitable sowing date of sweet corn as an intercrop with potato, to grow easily two crops in the charland farmers and to find out agro-economic performance of potato + sweet corn intercropping. Six treatments viz., simultaneous sowing of potato and sweet corn, sweet corn sown at 10 days after potato planting (DAPP), sweet corn sown at 20 DAPP, sweet corn sown at 30 DAPP, sole potato and sole sweet corn were tested in this study. Highest potato yield was obtained from sole potato treatment (27.4 t ha-1) which was similar to simultaneous sowing of potato and sweet corn (26.7 t ha-1) and sweet corn sown after 20 days of potato planting (26.7tha-1). Potato equivalent yield (PEY) (38.4 t ha-1)highest gross return Tk. 460350 ha-1 , gross margin Tk. 351391 ha-1 and benefit cost ratio 4.23 was observed from simultaneous sowing of potato and sweet corn (T1). The result indicated that simultaneous sowing of potato with sweet corn (T1) best performed in potato yield, sweet corn yield, gross return BCR and PEY compared with the other treatments.

Journal of Plant Pathology, Jan 2017

Citrus huanglongbing (greening) is one of the important diseases of citrus in Asia (Bové, 2006). ... more Citrus huanglongbing (greening) is one of the important diseases of citrus in Asia (Bové, 2006). The symptoms include blotchy chlorosis and/or mottling of the leaves, stunted growth, poor root growth, small, green, and malformed fruits and decline of the trees. The disease is caused by the phloem-limited unculturable fastidious bacteria Candida-tus Liberibacter asiaticus (CLas), Ca. L. africanus (CLaf), and Ca. L. americanus (CLam) (Bové, 2006; Jagoueix et al., 1994). Among them CLas is the most widespread (e.g., Asia, Brazil and North America). In recent years the presence of huanglongbing was suspected in different regions of Bangladesh. To establish whether this is the case, in July, 2016 symptomatic plant samples of Citrus sinensis were collected from four citrus-growing areas of the country: Jaintapur (Sylhet), Akbarpur (Moulvibazar), Dighinala (Khagrachari) and Hathazari (Chittagong). The samples were analyzed by polymerase PCR using the ‘CLas’ specific primers A2 (5’-TATA A AGGTTGACCTTTCGAGTTT-3’) and J5 (5’-ACA A A AGCAGA A ATAGCACGA ACA A-3’) which amplify a partial sequence of the β-operon (rplKAJL-rpoBC operon) of ribosomal protein genes (Hocquellet et al., 1999). A product 703 bp in size specific to Ca. L. asiaticus was amplified, sequenced and deposited in GenBank (accession No. KX826950). The nucleotide sequence of the recovered CLas shared 100% sequence identity with other Ca. L. asiaticus strains from NCBI database (e.g. KC477384, KT164844, KC133065). To our knowledge this is the first molecular-based detection of Candidatus Liberibacter asiaticus infecting Citrus sinensis in Bangladesh.

. Journal of Bioscience and Agriculture Research, 2016

The experiment was conducted to find out the effect of different sources of nutrient and hormones... more The experiment was conducted to find out the effect of different sources of nutrient and hormones on the growth and yield of tomato. The study consisted of Factor A: different nutrient sources viz. N0: Control; N1: Cowdung (60 tha-1); N2: Vermicompost (7 tha-1) and N3: Recommended dose (10 ton Cowdung + 550 kg Urea + 450 kg TSP + 250 kg MPha-1) and Factor B: different hormones viz. H0: Control; H1: NAA (30 ppm) and H2: GA3 (30 ppm). The minimum days (32d) required from transplanting to 1 st flowering from N3H2 and the maximum (39d) was needed from N0H0. The treatment N3H2 performed better than other treatments and produced maximum (59.11) number of fruits per plant, maximum (95.82 g) weight of individual fruit and maximum (83.87 ton) yield per hectare. Treatment combination, N3H2, enhanced fruit production by about three times over control (20 fruits plant-1) and individual fruit weight by 1.6 times compared to control (59 g plant-1) resulting maximum fruit yield (83.87t ha-1) which is 2.4 times higher than that of control, N0H0. It appears that the recommended fertilizer dose along with GA3 application may be recommended for tomato production.

Research & Reviews: Journal of Crop Science and Technology, 2015

Thirty five groundwater samples were collected to appraise the chemical constituents in order to ... more Thirty five groundwater samples were collected to appraise the chemical constituents in order to classify them on the basis of their suitability for irrigation and drinking. The considered water quality parameters are pH, EC, TDS, calcium, magnesium, sodium, potassium, iron, manganese, boron, sulphate, bicarbonate, chloride, sodium adsorption ratio, residual sodium carbonate, soluble sodium percentage,Kelly’s ratio, magnesium percentage and hardness. All the water samples were neutral to slightly alkaline in nature (pH=6.97 to 7.62). As regards to TDS values, groundwater samples wererated as fresh water (TDS<1000mgL-1) in quality. EC and SAR indicated that water samples were medium salinity (C2) and low alkalinity (S1) hazards expressed as C2S1and could be safely used for moderate salt tolerance crops growing on soils. Groundwatersamples were classified as good and permissible in quality based on SSP. All groundwater samples were free from RSC and belonged to suitable in category. As per hardness (HT), samples were moderately hard tohard in quality. The detected concentrations ofdifferent cations and anions were found below the toxic levels and might not pose threat to soil system as irrigation waterand could be used for drinking. In most of the groundwater samples, HCO3 ion was within the safe limit but only in four samples HCO3 ion was considered as toxicant for irrigating soils and crops. The toxicity of Mn ion was detected in two samples and the rest of the water samples were suitable for irrigation.

Research & Reviews: Journal of Crop Science and Technology, 2015

Weeds are always a disturbing pest in crop field. The success of cultivation mainly depends on pr... more Weeds are always a disturbing pest in crop field. The success of cultivation mainly depends on proper management of weeds through different approaches. The study was conducted in boro (dry) season during the period from November 2010 to May 2011 to investigate effect of row direction and weeding regime on growth and yield of rice. The experiment was consisted of ten weeding regimes and two row directions. Almost all growth parameters, crop characters and yield parameters were influenced significantly due to weeding regimes and row directions. Weeding at 15 days interval was found to produce the tallest plant (88.70 cm), the greatest number of tiller hill-1 (14.79) and the longest panicle (23.87 cm) under East-West row direction. The highest amount of total dry matter production (63.88 g) was found from weeding at 15 days interval and East-West row direction at 60 days after transplanting. Grain yield (4.46 t ha-1) was 130% higher with weeding at 15 days interval over no weeding under East-West row direction. East-West row direction also produced 46% higher straw yield (5.06 t ha-1) from weeding at 15 days interval over no weeding.

Research & Reviews: Journal of Agricultural Science and Technology, 2014

A field experiment was conducted at the Regional Agricultural Research Station, Hathazari, Chitta... more A field experiment was conducted at the Regional Agricultural Research Station, Hathazari, Chittagong to study the effect of different mulch materials on the yield and quality of tomato. rice husk mulch was found superior to sawdust, garden leaves and black polyethylene mulch in producing higher yield of tomato. Higher number of fruits per plant and maximum yield was recorded with rice husk which was 17.93% higher than the control (without mulch). BARI Tomato 14 in combination with rice husk produced highest yield (79.74 t/ha) highest TSS (6.67).