NAYAN ADHIKARY - Academia.edu (original) (raw)
Papers by NAYAN ADHIKARY
International Journal of Experimental Research and Review, 2024
A field experiment was carried out at ARS, Faculty of Agricultural Sciences, SOADU, Bhubaneswar, ... more A field experiment was carried out at ARS, Faculty of Agricultural Sciences, SOADU, Bhubaneswar, on Dynamics of weed and productivity in summer Green Gram (Vigna Radiata L.) by using different nitrogen levels and weed control techniques in south-eastern Odisha during summer, 2022. The experiment was conducted in split plot design with three replications comprising fifteen treatment combinations. The main plot had three levels of nitrogen, and the sub-plots used five weed control methods. The most prevalent weeds in the experimental plots were Poa annua, Digitaria sanguinalis, Echinochloa colona, Cleome viscose, Ageratum conyzoides, Portulaca oleracea and Melochia corchorifolia. According to the result, dry weight and weed density obtained for each crop growth stage were lower under 75% nitrogen. Similarly, two-hand weeding at 15 and 30 days after sowing reduced dry weight and weed density to the lowest level that was on par with ready-mix of pendimethalin + imazethapyr @ 0.75 kg ha-1 pre-emergence control. Similar to 100 % N application and maximum growth in terms of all yield parameters was observed under 125% nitrogen. In terms of weed control, pre-emergence treatment of the ready-mix herbicide was closely followed by two-hand weeding at 15 and 30 days after sowing, which produced the maximum seed yield (930.56 kg ha-1) and stover yield (2397.11 kg ha-1) for green gram. In comparison to the plots receiving two hand weeding and a ready-mix herbicide treatment, the seed yield in the untreated weed plots was 51.70 and 50.88% lower, respectively.
Environment and Ecology, 2017
Journal of Applied and Natural Science, Jun 1, 2017
Combination of chemical fungicides (viz., Carbendazim 50 WP and Tebuconazole 250 EC) and biocontr... more Combination of chemical fungicides (viz., Carbendazim 50 WP and Tebuconazole 250 EC) and biocontrol agents (viz., Pseudomonas fluorescens Psfl1, P. striata Pst1, Azotobacter chrococcum Azbc3, Bradyrhizobium japonicum Brj4, Trichoderma aureoviridae S12, T. harzianum JTV2, T. virens JPG1, Aspergillus niger AN15 strains respectively either singly or in consortium) were used to counteract Macrophomina phaseolina, the causal organism of stem and root rot of jute. In addition, suitable plant growth regulator viz., Indole-3-acetic acid (100-1.0 µg/ppm) and herbicide Quizalofop ethyl 5 % EC were used to augment the activity of Trichoderma. T. aureoviridae strain S12 was found to be the best among the eight isolates screened for tolerance against the two fungicides and herbicide at a concentration of 10000-500 µg respectively as well as against M. phaseolina (Inhibition=72.33 %) in-vitro. This strain showed best compatibility with other strains and highest tolerance to fungicide i.e., Carbendazim 50 % (up to 500 μg). Highest number (13.7×10 6) of active spores was recorded at a concentration of 25 ppm of IAA under invitro condition. S12 recorded a biocontrol efficiency of 61.8 % against stem rot of jute along with significant plant growth promotion and fibre production. Plant biomass also increased up to 7.5-12.1 % and fibre production 37.0-39.9 % with fungal and bacterial consortium + carbendazim seed dressing and soil drenching. These biocontrol fungi and PGPR consortium with high tolerance to fungicide, weedicide and plant growth regulator up to certain extent may be potentially exploited in IDM which may be a low cost technology in jute and allied fibre crops.
Journal of Applied and Natural Science, Dec 1, 2017
Bupirimate 25% Emulsifiable concentrate (EC) was evaluated for efficacy on Sphaerotheca pannosa, ... more Bupirimate 25% Emulsifiable concentrate (EC) was evaluated for efficacy on Sphaerotheca pannosa, the causal agent of rose powdery mildew in vivo. In this experiment Bupirimate 25% EC 6 ml/L and 4 ml/L effectively reduced the powdery mildew infection over rest of the treatments and improved the flower yield. Moreover, application of Bupirimate 25% EC at the doses of 2, 4 and 6 ml/L and even at higher dose 8 ml/L did not show any phytotoxic symptoms on rose plant. Thus, Bupirimate 25% EC may be considered as compared to other fungicides.
International Journal of Enviornment and Climate Change, Aug 7, 2020
Sesame is one of the most important oilseed crops in India due to mainly its high quality seed oi... more Sesame is one of the most important oilseed crops in India due to mainly its high quality seed oil and antioxidant properties. Occurrence of foliar diseases, like Alternaria leaf spot and Cercospora leaf spot has become a major constraint in recent years for successful and profitable cultivation of sesame. Field experiments were conducted with sesame var. savitri in a factorial randomized block design with three different dates of sowing with 15 days interval and two different plant protection situations (Protected i.e., treated with disease control protocols and unprotected i.e., control), replicated four times, during two consecutive summer seasons of 2018 and 2019 at Agricultural
International Journal of Environment and Climate Change
Late blight of potato caused by Phytophthora infestans is one of the most destructive diseases of... more Late blight of potato caused by Phytophthora infestans is one of the most destructive diseases of potato world over. The devastation of the disease is very much related with climatic factors like temperature, relative humidity, fog or dew deposition and also sunshine hours. An experiment was conducted in Indo-Gangetic plains of West Bengal to know the effect of weather parameters on initiation and severity of the disease as well as progress and pattern of development of disease which will ultimately help to develop the effective spray schedule to manage the disease. From the experiment it is observed that 7 days prior to first appearance of late blight disease of potato the average maximum and minimum temperature varied between 24-26˚C and 7-8˚C respectively; average maximum and minimum relative humidity varied between 90-93% and 41-44% respectively; average sunshine hours per day varied between 6-8 hours. Correlation study of late blight disease severity with different weather para...
Innovative Approaches in Diagnosis and Management of Crop Diseases, 2021
Anthracnose disease caused by Colletotrichum gloeosporioides is one of the most serious diseases ... more Anthracnose disease caused by Colletotrichum gloeosporioides is one of the most serious diseases causing yield losses in mango. For controlling this disease much of attention and efforts has concentrated on the application of fungicides. The indiscriminate use of different fungicides possesses potential threat to human health, phytotoxicity, environmental hazards and development of pathogen resistance. Keeping this in view, the efficacy of azoxystrobin, one of the strobilurin class fungicides, which has broad-spectrum activity against large number of plant diseases, was evaluated both under in vitro and in vivo conditions. In in vitro tests, azoxystrobin significantly reduced both mycelial growth and conidial germination of C. gloeosporioides in PDA media. Although the mycelial growth and conidial germination of the fungus was declined continuously in 100, 200, 300 and 400ppm, the optimum rate was obtained at 100ppm where it responded continuously to climb with increasing rates. In ...
The present investigation was made to assess the antagonism of new potential bacterial isolates, ... more The present investigation was made to assess the antagonism of new potential bacterial isolates, Bacillus amyloliquefaciens of plant growth promoting rhizobacteria to control Macrophomina Phaseolina disease complex of jute. Bacillus spp. are well known rhizosphere residents of many crops and usually show plant growth promoting activities that include bio control capacity against some phytopatogenic fungi. Amongst the isolated microorganisms, three in which one Bacillus and two others were initially selected based on dual culture technique, production of volatile substance (HCN) in NA, indication towards phytohormone viz. indole 3 acetic acid along with siderophore production. Among the isolated strains Bacillus amyloliquefaciens showed the best effect in phosphate solubilisation efficiency (73.33%), seed germination (96.66%) and seedling growth of jute, almost near the highest ability to pathogen inhibition (74.26%), reduction of stem rot disease severity (62.9%) in the green house ...
International Journal of Current Microbiology and Applied Sciences
Environment and Ecology, 2017
Advanced Agriculture, 2020
Current Journal of Applied Science and Technology, 2020
Mango is a crop of economic importance for its high export potentiality and usage as fresh and pr... more Mango is a crop of economic importance for its high export potentiality and usage as fresh and processed products of many kinds. However, increase its shelf life with maintaining postharvest quality and acceptability for long period is prime concerned since mango is a climacteric crop and cannot store for more than 5-7 days after ripening at ambient condition. Low temperature storage along with controlled atmospheric condition is being practised to keep fruits fresh. Controlled atmospheric storage reduces physiological processes, delayed ripening, but, can cause off flavour, internal tissue degradation, poor colouration and other physiological disorders. With the growing consciousness on bad effect of various chemical techniques and environmental hazards emphasizes a need to develop consumer friendly and environment friendly technology to increase shelf life of mango fruits with maintaining its quality and general acceptability. Use of edible coating is now becoming popular because ...
![Research paper thumbnail of Genome characterisation of a distinct species of Begomovirus causing leaf curl disease in sweetpotato [Ipomoea batatas L. (Lam)] in India](https://attachments.academia-assets.com/95673647/thumbnails/1.jpg)
](The Journal of Horticultural Science and Biotechnology, 2020
A novel species of monopartite begomovirus was detected in sweetpotato [Ipomoea batatas L (Lam)] ... more A novel species of monopartite begomovirus was detected in sweetpotato [Ipomoea batatas L (Lam)] originating from the experimental field of ICAR-AICRP on Tuber Crops (West Bengal), India. The plants showed a typical upward curling of leaves symptoms and reduction in plant height and was easily transmitted through the tuber and vine cuttings of infected plant. PCR-mediated detection using specific primers confirmed the presence of begomovirus in the infected sweetpotato plants. The virus isolate was characterised genome level with 2823 nucleotide in size (GenBank accession FN432356) and designated as Sweet potato leaf curl Bengal virus (SPLCV) (India:West Bengal). The comparative analysis showed that SPLCV (India:West Bengal) clustered with distinct isolate of previously reported 35 SPLCV in the world. Six ORFs of the isolate were highly divergent from equivalent regions of other isolates. Sequence comparisons and population structure analysis of 35 SPLCV isolates revealed that SPLCV (India:West Bengal) showed 85-90% nucleotide sequence identity. Systematic examination revealed that SPLCV (India:West Bengal) isolate was shown to have a recombinant in origin. The results of the current study have uncovered the diversity and genetic structure of sweetpotato leaf curl virus and generated potentially useful information for developing management strategies for this virus.
International Journal of Current Microbiology and Applied Sciences, 2020
International Journal of Current Microbiology and Applied Sciences, 2019
Current Journal of Applied Science and Technology, 2020
Vegetable marketing has been affected by several production and marketing constraints, among thes... more Vegetable marketing has been affected by several production and marketing constraints, among these losses from pests, lack of quality seeds and irrigation facilities and high variation in yields. The post harvest losses are also high due to perishable nature of the product. Most of the vegetables produced in India are sold afresh. The processing structure is inadequate and value addition is low. Due to some inherent problem of poverty and constraints the small vegetable farmers have not been able to derive the same benefit of modern vegetable technologies as compared to bigger farmers. The high volume and perishability of vegetables causes several problems in their marketing. Other problems which already exist in the market are lack of marketing intelligence, price risk, delayed sale and payment, lack of processing and high cost of packaging. The different factors like literacy, fertilizer, institutional credits to agriculture, road density are observed to have positively influencin...
Current Journal of Applied Science and Technology, 2019
Mulching has become an important practice in modern field production. The use of mulches in veget... more Mulching has become an important practice in modern field production. The use of mulches in vegetable production is undergoing a radical change away from high input, nonrenewable resources, such as plastic, to the use of high-residue organic mulches from cover crop. The purpose of this present study was to compare the growth and yield of tomato when grown under different organic and inorganic mulches. The experiment was conducted with four treatments in two consecutive years (2016-2017 and 2017-2018) at instructional farm of Sasya Shyamala Krishi Vigyan Kendra, Arapanch and different blocks of South 24 Parganas district. Among the treatments, maximum yield 60.3 t/ha and 58.7 t/ha were recorded under poly mulches in the consecutive years.
International Journal of Experimental Research and Review, 2024
A field experiment was carried out at ARS, Faculty of Agricultural Sciences, SOADU, Bhubaneswar, ... more A field experiment was carried out at ARS, Faculty of Agricultural Sciences, SOADU, Bhubaneswar, on Dynamics of weed and productivity in summer Green Gram (Vigna Radiata L.) by using different nitrogen levels and weed control techniques in south-eastern Odisha during summer, 2022. The experiment was conducted in split plot design with three replications comprising fifteen treatment combinations. The main plot had three levels of nitrogen, and the sub-plots used five weed control methods. The most prevalent weeds in the experimental plots were Poa annua, Digitaria sanguinalis, Echinochloa colona, Cleome viscose, Ageratum conyzoides, Portulaca oleracea and Melochia corchorifolia. According to the result, dry weight and weed density obtained for each crop growth stage were lower under 75% nitrogen. Similarly, two-hand weeding at 15 and 30 days after sowing reduced dry weight and weed density to the lowest level that was on par with ready-mix of pendimethalin + imazethapyr @ 0.75 kg ha-1 pre-emergence control. Similar to 100 % N application and maximum growth in terms of all yield parameters was observed under 125% nitrogen. In terms of weed control, pre-emergence treatment of the ready-mix herbicide was closely followed by two-hand weeding at 15 and 30 days after sowing, which produced the maximum seed yield (930.56 kg ha-1) and stover yield (2397.11 kg ha-1) for green gram. In comparison to the plots receiving two hand weeding and a ready-mix herbicide treatment, the seed yield in the untreated weed plots was 51.70 and 50.88% lower, respectively.
Environment and Ecology, 2017
Journal of Applied and Natural Science, Jun 1, 2017
Combination of chemical fungicides (viz., Carbendazim 50 WP and Tebuconazole 250 EC) and biocontr... more Combination of chemical fungicides (viz., Carbendazim 50 WP and Tebuconazole 250 EC) and biocontrol agents (viz., Pseudomonas fluorescens Psfl1, P. striata Pst1, Azotobacter chrococcum Azbc3, Bradyrhizobium japonicum Brj4, Trichoderma aureoviridae S12, T. harzianum JTV2, T. virens JPG1, Aspergillus niger AN15 strains respectively either singly or in consortium) were used to counteract Macrophomina phaseolina, the causal organism of stem and root rot of jute. In addition, suitable plant growth regulator viz., Indole-3-acetic acid (100-1.0 µg/ppm) and herbicide Quizalofop ethyl 5 % EC were used to augment the activity of Trichoderma. T. aureoviridae strain S12 was found to be the best among the eight isolates screened for tolerance against the two fungicides and herbicide at a concentration of 10000-500 µg respectively as well as against M. phaseolina (Inhibition=72.33 %) in-vitro. This strain showed best compatibility with other strains and highest tolerance to fungicide i.e., Carbendazim 50 % (up to 500 μg). Highest number (13.7×10 6) of active spores was recorded at a concentration of 25 ppm of IAA under invitro condition. S12 recorded a biocontrol efficiency of 61.8 % against stem rot of jute along with significant plant growth promotion and fibre production. Plant biomass also increased up to 7.5-12.1 % and fibre production 37.0-39.9 % with fungal and bacterial consortium + carbendazim seed dressing and soil drenching. These biocontrol fungi and PGPR consortium with high tolerance to fungicide, weedicide and plant growth regulator up to certain extent may be potentially exploited in IDM which may be a low cost technology in jute and allied fibre crops.
Journal of Applied and Natural Science, Dec 1, 2017
Bupirimate 25% Emulsifiable concentrate (EC) was evaluated for efficacy on Sphaerotheca pannosa, ... more Bupirimate 25% Emulsifiable concentrate (EC) was evaluated for efficacy on Sphaerotheca pannosa, the causal agent of rose powdery mildew in vivo. In this experiment Bupirimate 25% EC 6 ml/L and 4 ml/L effectively reduced the powdery mildew infection over rest of the treatments and improved the flower yield. Moreover, application of Bupirimate 25% EC at the doses of 2, 4 and 6 ml/L and even at higher dose 8 ml/L did not show any phytotoxic symptoms on rose plant. Thus, Bupirimate 25% EC may be considered as compared to other fungicides.
International Journal of Enviornment and Climate Change, Aug 7, 2020
Sesame is one of the most important oilseed crops in India due to mainly its high quality seed oi... more Sesame is one of the most important oilseed crops in India due to mainly its high quality seed oil and antioxidant properties. Occurrence of foliar diseases, like Alternaria leaf spot and Cercospora leaf spot has become a major constraint in recent years for successful and profitable cultivation of sesame. Field experiments were conducted with sesame var. savitri in a factorial randomized block design with three different dates of sowing with 15 days interval and two different plant protection situations (Protected i.e., treated with disease control protocols and unprotected i.e., control), replicated four times, during two consecutive summer seasons of 2018 and 2019 at Agricultural
International Journal of Environment and Climate Change
Late blight of potato caused by Phytophthora infestans is one of the most destructive diseases of... more Late blight of potato caused by Phytophthora infestans is one of the most destructive diseases of potato world over. The devastation of the disease is very much related with climatic factors like temperature, relative humidity, fog or dew deposition and also sunshine hours. An experiment was conducted in Indo-Gangetic plains of West Bengal to know the effect of weather parameters on initiation and severity of the disease as well as progress and pattern of development of disease which will ultimately help to develop the effective spray schedule to manage the disease. From the experiment it is observed that 7 days prior to first appearance of late blight disease of potato the average maximum and minimum temperature varied between 24-26˚C and 7-8˚C respectively; average maximum and minimum relative humidity varied between 90-93% and 41-44% respectively; average sunshine hours per day varied between 6-8 hours. Correlation study of late blight disease severity with different weather para...
Innovative Approaches in Diagnosis and Management of Crop Diseases, 2021
Anthracnose disease caused by Colletotrichum gloeosporioides is one of the most serious diseases ... more Anthracnose disease caused by Colletotrichum gloeosporioides is one of the most serious diseases causing yield losses in mango. For controlling this disease much of attention and efforts has concentrated on the application of fungicides. The indiscriminate use of different fungicides possesses potential threat to human health, phytotoxicity, environmental hazards and development of pathogen resistance. Keeping this in view, the efficacy of azoxystrobin, one of the strobilurin class fungicides, which has broad-spectrum activity against large number of plant diseases, was evaluated both under in vitro and in vivo conditions. In in vitro tests, azoxystrobin significantly reduced both mycelial growth and conidial germination of C. gloeosporioides in PDA media. Although the mycelial growth and conidial germination of the fungus was declined continuously in 100, 200, 300 and 400ppm, the optimum rate was obtained at 100ppm where it responded continuously to climb with increasing rates. In ...
The present investigation was made to assess the antagonism of new potential bacterial isolates, ... more The present investigation was made to assess the antagonism of new potential bacterial isolates, Bacillus amyloliquefaciens of plant growth promoting rhizobacteria to control Macrophomina Phaseolina disease complex of jute. Bacillus spp. are well known rhizosphere residents of many crops and usually show plant growth promoting activities that include bio control capacity against some phytopatogenic fungi. Amongst the isolated microorganisms, three in which one Bacillus and two others were initially selected based on dual culture technique, production of volatile substance (HCN) in NA, indication towards phytohormone viz. indole 3 acetic acid along with siderophore production. Among the isolated strains Bacillus amyloliquefaciens showed the best effect in phosphate solubilisation efficiency (73.33%), seed germination (96.66%) and seedling growth of jute, almost near the highest ability to pathogen inhibition (74.26%), reduction of stem rot disease severity (62.9%) in the green house ...
International Journal of Current Microbiology and Applied Sciences
Environment and Ecology, 2017
Advanced Agriculture, 2020
Current Journal of Applied Science and Technology, 2020
Mango is a crop of economic importance for its high export potentiality and usage as fresh and pr... more Mango is a crop of economic importance for its high export potentiality and usage as fresh and processed products of many kinds. However, increase its shelf life with maintaining postharvest quality and acceptability for long period is prime concerned since mango is a climacteric crop and cannot store for more than 5-7 days after ripening at ambient condition. Low temperature storage along with controlled atmospheric condition is being practised to keep fruits fresh. Controlled atmospheric storage reduces physiological processes, delayed ripening, but, can cause off flavour, internal tissue degradation, poor colouration and other physiological disorders. With the growing consciousness on bad effect of various chemical techniques and environmental hazards emphasizes a need to develop consumer friendly and environment friendly technology to increase shelf life of mango fruits with maintaining its quality and general acceptability. Use of edible coating is now becoming popular because ...
The Journal of Horticultural Science and Biotechnology, 2020
A novel species of monopartite begomovirus was detected in sweetpotato [Ipomoea batatas L (Lam)] ... more A novel species of monopartite begomovirus was detected in sweetpotato [Ipomoea batatas L (Lam)] originating from the experimental field of ICAR-AICRP on Tuber Crops (West Bengal), India. The plants showed a typical upward curling of leaves symptoms and reduction in plant height and was easily transmitted through the tuber and vine cuttings of infected plant. PCR-mediated detection using specific primers confirmed the presence of begomovirus in the infected sweetpotato plants. The virus isolate was characterised genome level with 2823 nucleotide in size (GenBank accession FN432356) and designated as Sweet potato leaf curl Bengal virus (SPLCV) (India:West Bengal). The comparative analysis showed that SPLCV (India:West Bengal) clustered with distinct isolate of previously reported 35 SPLCV in the world. Six ORFs of the isolate were highly divergent from equivalent regions of other isolates. Sequence comparisons and population structure analysis of 35 SPLCV isolates revealed that SPLCV (India:West Bengal) showed 85-90% nucleotide sequence identity. Systematic examination revealed that SPLCV (India:West Bengal) isolate was shown to have a recombinant in origin. The results of the current study have uncovered the diversity and genetic structure of sweetpotato leaf curl virus and generated potentially useful information for developing management strategies for this virus.
International Journal of Current Microbiology and Applied Sciences, 2020
International Journal of Current Microbiology and Applied Sciences, 2019
Current Journal of Applied Science and Technology, 2020
Vegetable marketing has been affected by several production and marketing constraints, among thes... more Vegetable marketing has been affected by several production and marketing constraints, among these losses from pests, lack of quality seeds and irrigation facilities and high variation in yields. The post harvest losses are also high due to perishable nature of the product. Most of the vegetables produced in India are sold afresh. The processing structure is inadequate and value addition is low. Due to some inherent problem of poverty and constraints the small vegetable farmers have not been able to derive the same benefit of modern vegetable technologies as compared to bigger farmers. The high volume and perishability of vegetables causes several problems in their marketing. Other problems which already exist in the market are lack of marketing intelligence, price risk, delayed sale and payment, lack of processing and high cost of packaging. The different factors like literacy, fertilizer, institutional credits to agriculture, road density are observed to have positively influencin...
Current Journal of Applied Science and Technology, 2019
Mulching has become an important practice in modern field production. The use of mulches in veget... more Mulching has become an important practice in modern field production. The use of mulches in vegetable production is undergoing a radical change away from high input, nonrenewable resources, such as plastic, to the use of high-residue organic mulches from cover crop. The purpose of this present study was to compare the growth and yield of tomato when grown under different organic and inorganic mulches. The experiment was conducted with four treatments in two consecutive years (2016-2017 and 2017-2018) at instructional farm of Sasya Shyamala Krishi Vigyan Kendra, Arapanch and different blocks of South 24 Parganas district. Among the treatments, maximum yield 60.3 t/ha and 58.7 t/ha were recorded under poly mulches in the consecutive years.