Himangshu Mishra - Academia.edu (original) (raw)
Papers by Himangshu Mishra
Indian Journal of Entomology , 2015
Field experiments were conducted to study the population dynamics of banana leaf and fruit scarri... more Field experiments were conducted to study the population dynamics of banana leaf and fruit scarring beetle, Nodostoma subcostatum Jacoby on dwarf cavendish at the Horticultural Experimental Farm, Assam Agricultural University, Jorhat during 2011-12. Experimental results indicated that the highest population (32.2 beetles/plant) and scars (28.4 scars/5cm 2) were recorded during the second fortnight of August, 2011 which gradually decreased from September and again progressively increased in March, 2012. The fortnightly average population and scars produced by the beetles showed positive and significant correlation with various meteorological parameters except morning relative humidity. Multiple regression analysis of beetle population and scars produced by N. subcostatum with meteorological parameters showed 89.6 and 88.3% variations due to the combined effect of various parameters.
Journal of entomology and zoology studies, 2018
Studies on aquatic insect fauna were carried out at the largest river island of the world, Majuli... more Studies on aquatic insect fauna were carried out at the largest river island of the world, Majuli during 2016-17. Seasonal surveys conducted during pre monsoon, monsoon, post monsoon and winter covering 60 sampling sites revealed the occurrence of a wide array of aquatic insects. Altogether 48 aquatic insect species belonging to 6 orders and 20 families were recorded. At order level, Odonata was found to be the most dominant order (47.92%) with the highest numbers of species (23) followed by Coleoptera and Hemiptera (18.75% abundance with 9 species each). Comparatively, only few aquatic insect species were registered under Ephemeroptera (6.25%, 3), Tricoptera (4.17%, 2) and Diptera (4.17%, 2).
Ecology and Management of Mound Building Termites
Journal of entomology and zoology studies, 2017
Species diversity and abundance of scarab beetles was studied from Assam, northeast India from 20... more Species diversity and abundance of scarab beetles was studied from Assam, northeast India from 20072013. A total of 44 species of scarabs under 6 sub families and 21 genera were identified, out of which 41 species are new records. Majority of the phytophagous species belonged to the subfamily Melolonthinae and Rutelinae while the coprophagous species belonged to Dynastinae and Cetoniinae. Species profiling revealed that Apogonia ferruginea was the most predominant species and contributed 17.60 per cent out of the total number of beetles followed by Anomala chlorosoma (14.56%), Adoretus spp. (12.75%), Apogonia area (10.94%) and Sophrops irridipennis (10.63%) with peak population in the month of July (419.14). Multiple regression analysis with weather parameters revealed that beetle population was influenced by combined effects of maximum temperature, total rainfall and wind speed in all years with maximum variation in 2007 (78.66%) and minimum in 2012 (59.56%).
Journal of entomology and zoology studies, 2016
The present study was conducted at Farmers field near Regional Agricultural Research Station, Tit... more The present study was conducted at Farmers field near Regional Agricultural Research Station, Titabar, main rice bowl of the district Jorhat, Assam. Visual count and catch per unit effort was adopted to record the odonate diversity in the rice field. 68 individuals of odonate belonging to 14 species, equal number of species were recorded from each sub-order, Zygoptera and Anisoptera. The study revealed more number of damselfly population (40) than the dragonfly (28). Vegetative growth of rice crop support more number of Odonates (17 damselfly and 10 dragonfly) followed by reproductive (15 damselfly and 10 dragonfly) and ripening stage (8 damselfly and 8 dragonfly). The most dominant damselfly and dragonfly species were Ceriagrion coromandelianum and Diplacodes trivialis with 11 and 10 individuals respectively. Diversity of damselfly (1.73) was greater than dragonfly (1.42) same as in case of richness and evenness index in vegetative stage. But dragonfly diversity (1.75) was more tha...
Journal of entomology and zoology studies, 2017
Field efficacy of some newer insecticides was evaluated against Odontotermes obesus in preserved ... more Field efficacy of some newer insecticides was evaluated against Odontotermes obesus in preserved setts of sugarcane at Assam Agricultural University, Jorhat during 2014-15. Three budded setts were treated with insecticides for one hour and were preserved by adopting “deep trench trash cover” method, in which seed stalks were vertically kept in narrow trenches with depth equal to the length of the stalks. In case of untreated control the setts were preserved horizontally. Experimental results indicated that all the insecticidal treatments were significantly superior over the untreated control in reducing termite infestation. The setts treated with clothianidin 50 WDG at concentration of 1ml/ lit registered the lowest infestation of termites (5.55 and 6.18% as number and portion infested respectively) and this treatment showed statistical parity with the combined application of acephate 50 per cent and imidacloprid 1.8 per cent at concentration 1ml/ lit treated setts (7.49 and 8.59%)....
Journal of Krishi Vigyan, 2020
On farm trial on growth performance of Amur common carp i.e, Hungarian strain of common carp in c... more On farm trial on growth performance of Amur common carp i.e, Hungarian strain of common carp in composite fish culture system was conducted for the first time in Barak Valley Zone of Assam. The trial was conducted in eight numbers of ponds of total 3.56 ha area for twelve months period. Water quality parameters of cultured pond were observed in monthly intervals. Water temperature was found in the range of 16 to 34°C, pH was maintained in the optimum range of 7.0 to 7.5 and dissolve oxygen was found between 5.2 to 5.8 mg/l. After twelve months of culture, mean length and weight of Amur common carp was found 30.5 cm and 1010 g compared to 27 cm and 920 g of local common carp.
Journal of entomology and zoology studies, 2017
Field efficacy of six different insecticides were evaluated against the grubs of L. mansueta in p... more Field efficacy of six different insecticides were evaluated against the grubs of L. mansueta in potato at the farmer’s field of Pohadiya village, Majuli, Assam during 2013-15. The required amount of insecticides was applied in seed furrows by incorporating with pulverized soil before sowing of the potato tubers. Experimental results indicated that all the insecticidal treatments were significantly superior in respect of per cent reduction of tuber damage as well as reducing the number of grubs per square meter over the untreated control. However, the plots treated with chlorpyriphos 10 G @ 2 kg a.i./ ha recorded lowest per cent of tuber damage (3.11 and 2.74 % both in weight and number basis) as well as least number of grubs (3.50) resulting in a marked increase in tuber yield of 119.91 q/ ha. On the other hand, untreated control recorded lowest yield (91.80 q/ ha) with a very high levels of infestation (28.79 and 28.94 based on weight and number, respectively) of tubers caused by t...
Ecofriendly management of banana leaf and fruit scarring beetle Basilepta subcostatum Jacoby in Assam
Indian journal of entomology, 2018
Journal of entomology and zoology studies, 2018
An investigation was carried out during 2015-16 and 2016-17 using five biocontrol agents along wi... more An investigation was carried out during 2015-16 and 2016-17 using five biocontrol agents along with chlorpyriphos 20 EC @ 2ml/lit as insecticidal check, against O. obesus in preserved setts of sugarcane in Jorhat, Assam. All the treatments were significantly superior over untreated control which recorded the highest level of infestation and poor germination percentage. Among the biocontrol agents, Metarhizium anisopliae @ 10 spore/lit treated setts gave promising results and recorded lowest mean number (21.25 and 19.06%) and portion of setts (22.62 and 23.59%) infestation with germination percentage of 67.86 and 67.81 during 2015-16 and 2016-17 respectively. Insecticidal check chlorpyriphos treated preserved setts maintained its superiority by registering least mean number (15.16 and 14.84%) and portion of setts (14.81 and 16.10%) infestation coupled with a marked increase in per cent germination (78.02 and 76.82%) during both the years.
Sustainability, 2021
Land use change has a great impact in determining the diversity patterns of soil fauna. Adoption ... more Land use change has a great impact in determining the diversity patterns of soil fauna. Adoption of any land use pattern significantly affects the soil structure and its physico-chemical characteristics, which often leads to the loss of biodiversity. Considering the collembolans as the key organism in the indicator shopping basket of soil environment, the response of Collembola communities under three different land uses represented by forest, vegetable and tea ecosystems was studied. Collembolans were sampled at monthly intervals using Tullgren funnel and identified by standard taxonomic keys. Diversity analysis and soil chemo-edaphic factors were studied to establish the impact of different land uses on Collembola communities. Five genera of Collembola viz., Cyphoderus, Entomobrya, Isotoma, Folsomia and Hypogastrura were recorded from the forest ecosystem whereas Folsomia was completely absent in vegetable ecosystem and the tea ecosystem soil was devoid of both Folsomia and Hypoga...
Journal of Environmental Biology, 2020
Aim: To investigate the influence of soil physico-chemical properties on diversity and density of... more Aim: To investigate the influence of soil physico-chemical properties on diversity and density of Collembola in an undisturbed fallow land ecosystem. Methodology: Soil sampling was done at monthly intervals to explore the diversity, density and seasonal variation patterns of collembolan population in a fallow land ecosystem during March, 2015 to February, 2016. Collembolans were sampled using Tullgren funnel and identified by standard taxonomic keys. Finally, correlation studies were conducted to assess the influence of different soil physico-chemical properties on diversity and density of collembolans. Results: Five species of Collembola (Cyphoderus sp., Entomobrya sp., Isotoma sp., Folsomia sp. and Hypogastrura sp.) belonging to 4 families (Cyphoderidae, Entomobryidae, Isotomidae and Hypogastruridae) were identified. Cyphoderus sp. was recorded to be the most abundant species contributing 44.29 percent of population. Analysis of different diversity indices revealed higher diversit...
Effect of different tillage practices on the existence of beetle holes of white grub, Lepidiota mansueta B. (Coleoptera: Scarabaeidae) in Majuli river island, Assam
Journal of Entomological Research, 2020
Field studies were conducted to know the relationship between different tillage practices and the... more Field studies were conducted to know the relationship between different tillage practices and the existence as well as depth of beetle holes of Lepidiota mansueta in some selected endemic villages. The results revealed that the maximum number of beetle holes (13.91–15.94/sq.m.) were recorded in the areas where no tillage operations were carried out and kept as uncultivated land followed by conventional tillage by bullocks (8.64–9.67/sq.m.) and tillage operation done by power tillers (4.59–5.69/sq.m.). Minimum number of holes (3.16–3.67/sq.m.) was found in areas where tillage operation was performed by the tractors. There was no significant differences observed (P = 0.05) in terms of depth of beetle holes in soil irrespective of the tillage operations conducted.
Rearing of two entomopathogenic nematodes, Heterorhabditis Bacteriophora poinar and Steinernema sp. in termite (Odontotermes Obesus ramb.)
Applied Biological Research, 2018
Suppression of termite attack in tea ecosystem with biopesticides
Indian Journal of Entomology, 2019
Distribution and abundance of Lepidiota Albistigma in relation to soil physicochemical properties in lower brahmaputra valley of Assam
Indian Journal of Entomology, 2019
Linking soil physico-chemical properties with the recent upsurge of Lepidiota mansueta (Coleoptera: Scarabaeidae) in sugarcane ecosystem of Majuli river island, Assam, India
Journal of Entomological Research, 2018
Efficacy of different microbial agents against Lepidiota mansueta Burmeister (Coleoptera: Scarabaeidae) in green gram
Journal of Entomological Research, 2019
Results indicated that microbial treatments were significantly superior in reducing plant mortali... more Results indicated that microbial treatments were significantly superior in reducing plant mortality as well as grub population over the untreated control. However, among all the microbial tested, combined formulation of Heterorhabditis indica and Meterhizium anisopilae treated plots recorded significantly lower per cent of plant mortality (14.16 & 16.00% after 40 and 60 days of sowing, respectively) and lowest number of grubs per sq. m. (3.88) resulting in highest grain yield of 5.81 q/ha. Yield recorded in case of M. anisopliae, NBAII 04, Beauveria bassiana with H. indica and B. bassiana alone, NBAII 01 and NBAII 06 recorded a grain yield of 5.35, 4.77, 4.28, 4.29, 4.04 and 4.71 q/ha, respectively. The untreated control plots registered a very high level of plant mortality both at 40 and 60 days after sowing (29.95 & 32.06% respectively) having maximum population of grubs (7 numbers/sq.m.) with a grain yield of 4.03 q/ha.
Ecofriendly management of banana leaf and fruit scarring beetleBasilepta subcostatumjacoby (Coleoptera: Chrysomelidae)
Indian Journal of Entomology, 2016
An experiment was conducted during 2010–11 at Horticulture Experimental Farm, Assam Agricultural ... more An experiment was conducted during 2010–11 at Horticulture Experimental Farm, Assam Agricultural University, Jorhat to test the field efficacy of biopesticide (azadirachtin 0.15%), biocontrol agent (Beauveria bassiana, 1X 107 conidia/ml), chemical pesticide (carbaryl 0.3%), cultural practices (tilling and clean cultivation, bunch covering with plastic bag) and some combination of cultural and botanical treatments (tilling and clean cultivation + azadirachtin 0.15%), and azadirachtin 0.15% spray + bunch covering) against banana leaf and fruit scarring beetle. Observation on beetles, number of scars on leaf and fruit, finger characters (pulp-skin ratio and finger weight) and yield were recorded. The best results were obtained for reduction in damage from carbaryl 0.3% spray which was followed by azadirachtin 0.15% spray with bunch covering, tilling and clean cultivation with azadirachtin 0.15% spray, bunch covering with plastic bag, tilling and clean cultivation, azadirachtin 0.15% spray and Beauveria bassiana suspension spray. Fruit infestation was recorded lowest in azadirachtin 0.15% spray with bunch covering. The highest yield of 45.16 tonnes/ha was recorded in azadirachtin 0.15% spray with bunch covering.
Evaluation of some insecticides against white grub, Lepidiota masueta in Colocasia esculenta
Journal of Entomological Research, 2015
Eight insecticides were evaluated against white grub, Lepidiota mansueta in colocasia at the farm... more Eight insecticides were evaluated against white grub, Lepidiota mansueta in colocasia at the farmer's field of Majuli river island. Fipronil 5 Sc @ 100 g a.i./ha treated plot registered lowest per cent of corm damage (7.02 and 6.95%), lowest grub population (3.33 and 3.00 numbers/sq.m) and highest yield (15.33 and 15.34 q/ha) during 1st and 2nd year respectively as compared to 20.87 and 20.43% corm damage with a corm yield of 10.38 and 10.39 q/ha. The highest B: c ratio (3.89 and 3.90) was observed in quinalphos 25 Ec@ 400 g a.i./ha followed by chlorpyriphos 20 Ec @ 400 g a.i./ha (2.90 and 2.96).
Indian Journal of Entomology , 2015
Field experiments were conducted to study the population dynamics of banana leaf and fruit scarri... more Field experiments were conducted to study the population dynamics of banana leaf and fruit scarring beetle, Nodostoma subcostatum Jacoby on dwarf cavendish at the Horticultural Experimental Farm, Assam Agricultural University, Jorhat during 2011-12. Experimental results indicated that the highest population (32.2 beetles/plant) and scars (28.4 scars/5cm 2) were recorded during the second fortnight of August, 2011 which gradually decreased from September and again progressively increased in March, 2012. The fortnightly average population and scars produced by the beetles showed positive and significant correlation with various meteorological parameters except morning relative humidity. Multiple regression analysis of beetle population and scars produced by N. subcostatum with meteorological parameters showed 89.6 and 88.3% variations due to the combined effect of various parameters.
Journal of entomology and zoology studies, 2018
Studies on aquatic insect fauna were carried out at the largest river island of the world, Majuli... more Studies on aquatic insect fauna were carried out at the largest river island of the world, Majuli during 2016-17. Seasonal surveys conducted during pre monsoon, monsoon, post monsoon and winter covering 60 sampling sites revealed the occurrence of a wide array of aquatic insects. Altogether 48 aquatic insect species belonging to 6 orders and 20 families were recorded. At order level, Odonata was found to be the most dominant order (47.92%) with the highest numbers of species (23) followed by Coleoptera and Hemiptera (18.75% abundance with 9 species each). Comparatively, only few aquatic insect species were registered under Ephemeroptera (6.25%, 3), Tricoptera (4.17%, 2) and Diptera (4.17%, 2).
Ecology and Management of Mound Building Termites
Journal of entomology and zoology studies, 2017
Species diversity and abundance of scarab beetles was studied from Assam, northeast India from 20... more Species diversity and abundance of scarab beetles was studied from Assam, northeast India from 20072013. A total of 44 species of scarabs under 6 sub families and 21 genera were identified, out of which 41 species are new records. Majority of the phytophagous species belonged to the subfamily Melolonthinae and Rutelinae while the coprophagous species belonged to Dynastinae and Cetoniinae. Species profiling revealed that Apogonia ferruginea was the most predominant species and contributed 17.60 per cent out of the total number of beetles followed by Anomala chlorosoma (14.56%), Adoretus spp. (12.75%), Apogonia area (10.94%) and Sophrops irridipennis (10.63%) with peak population in the month of July (419.14). Multiple regression analysis with weather parameters revealed that beetle population was influenced by combined effects of maximum temperature, total rainfall and wind speed in all years with maximum variation in 2007 (78.66%) and minimum in 2012 (59.56%).
Journal of entomology and zoology studies, 2016
The present study was conducted at Farmers field near Regional Agricultural Research Station, Tit... more The present study was conducted at Farmers field near Regional Agricultural Research Station, Titabar, main rice bowl of the district Jorhat, Assam. Visual count and catch per unit effort was adopted to record the odonate diversity in the rice field. 68 individuals of odonate belonging to 14 species, equal number of species were recorded from each sub-order, Zygoptera and Anisoptera. The study revealed more number of damselfly population (40) than the dragonfly (28). Vegetative growth of rice crop support more number of Odonates (17 damselfly and 10 dragonfly) followed by reproductive (15 damselfly and 10 dragonfly) and ripening stage (8 damselfly and 8 dragonfly). The most dominant damselfly and dragonfly species were Ceriagrion coromandelianum and Diplacodes trivialis with 11 and 10 individuals respectively. Diversity of damselfly (1.73) was greater than dragonfly (1.42) same as in case of richness and evenness index in vegetative stage. But dragonfly diversity (1.75) was more tha...
Journal of entomology and zoology studies, 2017
Field efficacy of some newer insecticides was evaluated against Odontotermes obesus in preserved ... more Field efficacy of some newer insecticides was evaluated against Odontotermes obesus in preserved setts of sugarcane at Assam Agricultural University, Jorhat during 2014-15. Three budded setts were treated with insecticides for one hour and were preserved by adopting “deep trench trash cover” method, in which seed stalks were vertically kept in narrow trenches with depth equal to the length of the stalks. In case of untreated control the setts were preserved horizontally. Experimental results indicated that all the insecticidal treatments were significantly superior over the untreated control in reducing termite infestation. The setts treated with clothianidin 50 WDG at concentration of 1ml/ lit registered the lowest infestation of termites (5.55 and 6.18% as number and portion infested respectively) and this treatment showed statistical parity with the combined application of acephate 50 per cent and imidacloprid 1.8 per cent at concentration 1ml/ lit treated setts (7.49 and 8.59%)....
Journal of Krishi Vigyan, 2020
On farm trial on growth performance of Amur common carp i.e, Hungarian strain of common carp in c... more On farm trial on growth performance of Amur common carp i.e, Hungarian strain of common carp in composite fish culture system was conducted for the first time in Barak Valley Zone of Assam. The trial was conducted in eight numbers of ponds of total 3.56 ha area for twelve months period. Water quality parameters of cultured pond were observed in monthly intervals. Water temperature was found in the range of 16 to 34°C, pH was maintained in the optimum range of 7.0 to 7.5 and dissolve oxygen was found between 5.2 to 5.8 mg/l. After twelve months of culture, mean length and weight of Amur common carp was found 30.5 cm and 1010 g compared to 27 cm and 920 g of local common carp.
Journal of entomology and zoology studies, 2017
Field efficacy of six different insecticides were evaluated against the grubs of L. mansueta in p... more Field efficacy of six different insecticides were evaluated against the grubs of L. mansueta in potato at the farmer’s field of Pohadiya village, Majuli, Assam during 2013-15. The required amount of insecticides was applied in seed furrows by incorporating with pulverized soil before sowing of the potato tubers. Experimental results indicated that all the insecticidal treatments were significantly superior in respect of per cent reduction of tuber damage as well as reducing the number of grubs per square meter over the untreated control. However, the plots treated with chlorpyriphos 10 G @ 2 kg a.i./ ha recorded lowest per cent of tuber damage (3.11 and 2.74 % both in weight and number basis) as well as least number of grubs (3.50) resulting in a marked increase in tuber yield of 119.91 q/ ha. On the other hand, untreated control recorded lowest yield (91.80 q/ ha) with a very high levels of infestation (28.79 and 28.94 based on weight and number, respectively) of tubers caused by t...
Ecofriendly management of banana leaf and fruit scarring beetle Basilepta subcostatum Jacoby in Assam
Indian journal of entomology, 2018
Journal of entomology and zoology studies, 2018
An investigation was carried out during 2015-16 and 2016-17 using five biocontrol agents along wi... more An investigation was carried out during 2015-16 and 2016-17 using five biocontrol agents along with chlorpyriphos 20 EC @ 2ml/lit as insecticidal check, against O. obesus in preserved setts of sugarcane in Jorhat, Assam. All the treatments were significantly superior over untreated control which recorded the highest level of infestation and poor germination percentage. Among the biocontrol agents, Metarhizium anisopliae @ 10 spore/lit treated setts gave promising results and recorded lowest mean number (21.25 and 19.06%) and portion of setts (22.62 and 23.59%) infestation with germination percentage of 67.86 and 67.81 during 2015-16 and 2016-17 respectively. Insecticidal check chlorpyriphos treated preserved setts maintained its superiority by registering least mean number (15.16 and 14.84%) and portion of setts (14.81 and 16.10%) infestation coupled with a marked increase in per cent germination (78.02 and 76.82%) during both the years.
Sustainability, 2021
Land use change has a great impact in determining the diversity patterns of soil fauna. Adoption ... more Land use change has a great impact in determining the diversity patterns of soil fauna. Adoption of any land use pattern significantly affects the soil structure and its physico-chemical characteristics, which often leads to the loss of biodiversity. Considering the collembolans as the key organism in the indicator shopping basket of soil environment, the response of Collembola communities under three different land uses represented by forest, vegetable and tea ecosystems was studied. Collembolans were sampled at monthly intervals using Tullgren funnel and identified by standard taxonomic keys. Diversity analysis and soil chemo-edaphic factors were studied to establish the impact of different land uses on Collembola communities. Five genera of Collembola viz., Cyphoderus, Entomobrya, Isotoma, Folsomia and Hypogastrura were recorded from the forest ecosystem whereas Folsomia was completely absent in vegetable ecosystem and the tea ecosystem soil was devoid of both Folsomia and Hypoga...
Journal of Environmental Biology, 2020
Aim: To investigate the influence of soil physico-chemical properties on diversity and density of... more Aim: To investigate the influence of soil physico-chemical properties on diversity and density of Collembola in an undisturbed fallow land ecosystem. Methodology: Soil sampling was done at monthly intervals to explore the diversity, density and seasonal variation patterns of collembolan population in a fallow land ecosystem during March, 2015 to February, 2016. Collembolans were sampled using Tullgren funnel and identified by standard taxonomic keys. Finally, correlation studies were conducted to assess the influence of different soil physico-chemical properties on diversity and density of collembolans. Results: Five species of Collembola (Cyphoderus sp., Entomobrya sp., Isotoma sp., Folsomia sp. and Hypogastrura sp.) belonging to 4 families (Cyphoderidae, Entomobryidae, Isotomidae and Hypogastruridae) were identified. Cyphoderus sp. was recorded to be the most abundant species contributing 44.29 percent of population. Analysis of different diversity indices revealed higher diversit...
Effect of different tillage practices on the existence of beetle holes of white grub, Lepidiota mansueta B. (Coleoptera: Scarabaeidae) in Majuli river island, Assam
Journal of Entomological Research, 2020
Field studies were conducted to know the relationship between different tillage practices and the... more Field studies were conducted to know the relationship between different tillage practices and the existence as well as depth of beetle holes of Lepidiota mansueta in some selected endemic villages. The results revealed that the maximum number of beetle holes (13.91–15.94/sq.m.) were recorded in the areas where no tillage operations were carried out and kept as uncultivated land followed by conventional tillage by bullocks (8.64–9.67/sq.m.) and tillage operation done by power tillers (4.59–5.69/sq.m.). Minimum number of holes (3.16–3.67/sq.m.) was found in areas where tillage operation was performed by the tractors. There was no significant differences observed (P = 0.05) in terms of depth of beetle holes in soil irrespective of the tillage operations conducted.
Rearing of two entomopathogenic nematodes, Heterorhabditis Bacteriophora poinar and Steinernema sp. in termite (Odontotermes Obesus ramb.)
Applied Biological Research, 2018
Suppression of termite attack in tea ecosystem with biopesticides
Indian Journal of Entomology, 2019
Distribution and abundance of Lepidiota Albistigma in relation to soil physicochemical properties in lower brahmaputra valley of Assam
Indian Journal of Entomology, 2019
Linking soil physico-chemical properties with the recent upsurge of Lepidiota mansueta (Coleoptera: Scarabaeidae) in sugarcane ecosystem of Majuli river island, Assam, India
Journal of Entomological Research, 2018
Efficacy of different microbial agents against Lepidiota mansueta Burmeister (Coleoptera: Scarabaeidae) in green gram
Journal of Entomological Research, 2019
Results indicated that microbial treatments were significantly superior in reducing plant mortali... more Results indicated that microbial treatments were significantly superior in reducing plant mortality as well as grub population over the untreated control. However, among all the microbial tested, combined formulation of Heterorhabditis indica and Meterhizium anisopilae treated plots recorded significantly lower per cent of plant mortality (14.16 & 16.00% after 40 and 60 days of sowing, respectively) and lowest number of grubs per sq. m. (3.88) resulting in highest grain yield of 5.81 q/ha. Yield recorded in case of M. anisopliae, NBAII 04, Beauveria bassiana with H. indica and B. bassiana alone, NBAII 01 and NBAII 06 recorded a grain yield of 5.35, 4.77, 4.28, 4.29, 4.04 and 4.71 q/ha, respectively. The untreated control plots registered a very high level of plant mortality both at 40 and 60 days after sowing (29.95 & 32.06% respectively) having maximum population of grubs (7 numbers/sq.m.) with a grain yield of 4.03 q/ha.
Ecofriendly management of banana leaf and fruit scarring beetleBasilepta subcostatumjacoby (Coleoptera: Chrysomelidae)
Indian Journal of Entomology, 2016
An experiment was conducted during 2010–11 at Horticulture Experimental Farm, Assam Agricultural ... more An experiment was conducted during 2010–11 at Horticulture Experimental Farm, Assam Agricultural University, Jorhat to test the field efficacy of biopesticide (azadirachtin 0.15%), biocontrol agent (Beauveria bassiana, 1X 107 conidia/ml), chemical pesticide (carbaryl 0.3%), cultural practices (tilling and clean cultivation, bunch covering with plastic bag) and some combination of cultural and botanical treatments (tilling and clean cultivation + azadirachtin 0.15%), and azadirachtin 0.15% spray + bunch covering) against banana leaf and fruit scarring beetle. Observation on beetles, number of scars on leaf and fruit, finger characters (pulp-skin ratio and finger weight) and yield were recorded. The best results were obtained for reduction in damage from carbaryl 0.3% spray which was followed by azadirachtin 0.15% spray with bunch covering, tilling and clean cultivation with azadirachtin 0.15% spray, bunch covering with plastic bag, tilling and clean cultivation, azadirachtin 0.15% spray and Beauveria bassiana suspension spray. Fruit infestation was recorded lowest in azadirachtin 0.15% spray with bunch covering. The highest yield of 45.16 tonnes/ha was recorded in azadirachtin 0.15% spray with bunch covering.
Evaluation of some insecticides against white grub, Lepidiota masueta in Colocasia esculenta
Journal of Entomological Research, 2015
Eight insecticides were evaluated against white grub, Lepidiota mansueta in colocasia at the farm... more Eight insecticides were evaluated against white grub, Lepidiota mansueta in colocasia at the farmer's field of Majuli river island. Fipronil 5 Sc @ 100 g a.i./ha treated plot registered lowest per cent of corm damage (7.02 and 6.95%), lowest grub population (3.33 and 3.00 numbers/sq.m) and highest yield (15.33 and 15.34 q/ha) during 1st and 2nd year respectively as compared to 20.87 and 20.43% corm damage with a corm yield of 10.38 and 10.39 q/ha. The highest B: c ratio (3.89 and 3.90) was observed in quinalphos 25 Ec@ 400 g a.i./ha followed by chlorpyriphos 20 Ec @ 400 g a.i./ha (2.90 and 2.96).