Promoting a Sustainable Future Through Research, Collaboration, and Education
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From Research to Action - Protecting Natural Resources and Fostering Sustainability
Collaboration, Education, and Advocacy for a Sustainable Future
Securing a Thriving Environment for Generations to Come Through Research and Education
ABSTRACT: Globally country bean (Lablab purpureus) is an excellent source of nutrients and an important delicious vegetable especially for the poor. But it is infested by various insects pests particularly leaf miner and leaf folder. A field experiment was conducted in RCBD from November 2021 to February 2022 to find out the potency of some novel formulated insecticides for managing the two major pests, leaf miners and leaf folders infesting BARI Shim-5 following RCBD. Five treatments with 3 different doses viz., T1 = Cyproflanilide 10% DC (ACC-Cy), T2 = Prophenophs 50% (Lambdacyhalothrin + Prophenos), T3 = Pyriproxyfen (Pyrifen 10.8 EC) and T4 = Noclaim 5 SG (Emamectin benzoate), and an untreated control were evaluated. Treatments were applied at 15 days interval and data were collected at 1st, 3rd, 5th, 7th days after treatments (DATs). All the treatments significantly reduced the infestation of leaf miners and leaf folders over untreated control. However, treated with Cyproflanilide 10% DC @ 0.60 ml L-1 of water was found to be effective against leaf miners (3.25, 3.42 and 3.33) and leaf folders (2.75, 2.92 and 3.34).
Keywords: Efficacy, insecticides, country bean, leaf miners, leaf folders.
Post Time: 1 year ago
ABSTARCT: The study was carried out to record the genotypic and seasonal influence on the population dynamics of okra sucking pests viz., Aphid (Aphis gossypii), whitefly (Bemisia tabaci), jassid (Amrasca biguttula biguttula) and red spider mite (Tetranychus urticae) during two cropping seasons (rabi 2019-2020 and kharif 2020) at Entomology Research Field, SAU campus, Sylhet, Bangladesh. In both seasons, four Japanese okra genotypes (JO3, JO5, JO7 and JO9) and two local okra varieties (BARI Dherosh-1 and BARI Dherosh-2) were used as treatments of the study. The genotype JO5 was found less susceptible to insect and mite pests in both seasons but its fruit bearing capacity was very low. The highest yield was found in BARI Dherosh-2 and JO7 in both seasons. Okra sucking pests were found more prevalent during kharif 2020 than those of the rabi 2019-2020. Red spider mites were absent during rabi 2019-2020. Aphid, whitefly, jassid and red spider mite showed significant negative relationship with rainfall during kharif 2020. To control the okra sucking pests, effective management techniques need to be adopted at the beginning of kharif-1 (March - April) when the pest infestation f irst appears.
Keywords: Accession, seasonality, weather parameter, correlation coefficient.
Post Time: 1 year ago
ABSTRACT: The study was conducted in the Department of Entomology of Bangabandhu Sheikh Mujibur Rahman Agricultural University during November 2020 to March 2021 to evaluate some selected eco-friendly management approaches against prodania caterpillar and diamondback moth (DBM) attacking cabbage. The treatments used in the study were Abom 1.8 EC (Abamectin) @ 1.2 ml l-1, Tracer 45 SC (Spinosad) @ 0.4 g l-1, Neem Seed kernel Extract (NSKE) @ 50 g l-1, Fytomax PM (0.1% Azadirachtin) @ 5 ml l-1 of water at 15 days interval. The untreated control and as a check Proclaim 5 SG (Emamectin Benzoate) @ 1ml l-1 was used for comparison. The study revealed that the treatment using Tracer 45 SC (Spinosad) @ 0.4 g l-1 of water at 15 days interval showed the best results. This treatment resulted the lowest number of diamondback moths (0.4 head-1) and prodania caterpillars (0.2 head-1), as well as the lowest rate of head infestation by prodania caterpillar and/or diamondback moth (3.9% by n/n and 3.7% by w/w). Additionally, Tracer 45 SC (Spinosad) @ 0.4 g l-1 showed the highest marketable head yield (59.8 t ha-1) and MBCR (7.8).
Keywords: Bio-rational insecticides, botanicals, Spinosad, Spodoptera, Plutella xylostella.
Post Time: 1 year ago
ABSTRACT: Pulse beetle, Callosobruchus chinensis L. is a major stored grain pest of Bangladesh and it is difficult to manage as infestation starts from the field. A laboratory study was carried out to protect the chickpea seeds in storage against C. chinensis by using clove powder as seed protectant at 1, 3, 5, 7, 9, 11 and 13 g kg-1 seeds of chickpea on the basis of adult mortality (%), number of eggs laid (%), adult emergence (%) and seed weight loss (%). Treated seeds did not show any egg on their surface and no adult was emerged when they were mixed with 9, 11 and 13 g clove powder kg-1 of chickpea seeds. Seed weight loss was lowest at 11 and 13 g powder kg-1 seeds, whereas the highest adult mortality (100%) was recorded at 9 and 13 g powder kg-1 seeds. In contrast, control seeds had maximum number of eggs laid (229.67), adult emergence (77.86%) and seed weight loss (30.38%) with the minimum adult mortality of 6.7%. It was found that total number of eggs laid, adult emergence (%) and seed weight loss (%) were markedly reduced whereas adult mortality increased with increasing the doses of clove powder. The results reported here that the clove powder could be a potential alternative option for pulse beetle management in chickpea storage.
Keywords: Storage pest, pulse beetle, mortality, adult emergence, weight loss.
Post Time: 1 year ago
ABSTRACT: A field experiment was conducted to study the seasonal incidence and fluctuation pattern of different insect pests and their natural enemies in winter brinjal grown in the experimental farm of Department of Entomology, Sylhet Agricultural University, Sylhet during October 2019 to March 2020. Observation was made in natural condition i.e.; no plant protection measures was taken. The counting of individual arthropod was performed by using visual searching. Eleven arthropod species were observed out of which 6 were insect pests (7 families under 3 orders) and 5 were natural enemies (10 families, 5 orders). The aphid (Aphis gossypii Glover), brinjal shoot and fruit borer (Leucinodes orbonalis Guenee), jassid (Amrasca biguttula biguttula), whitefly (Bemicia tabaci Genn.), epilachna beetle (Epilachna vigintioctopunctata Fab., Epilachna dodecastigma Most.), and leaf roller (Anobata olevacea) were observed as insect pests of brinjal field. Among the natural enemies, ladybird beetles (Micraspis crocera Muls., Menochilus sexmaculatus), spiders (Lycosa pseudoannulata, Oxyopes javanus, Atypena formosana), black ant (Camponotus compressus), dragonflies (Crocothemis servilia) were common. The total number of phytophagous insect was 2508 and their relative abundance was observed as aphid (15.31%) > epilachna beetle (10.06%) > leaf roller (7.39%) > jassid (6.30%) > whitefly (5.05%) > brinjal shoot and fruit borer (0.64%). On the other hand, the total number of all beneficial arthropods were 3093 and their relative abundance was found as ladybird beetle (40.22%) > black ant (10.65%) > dragonfly (1.55%) > spider (1.42%) > preying mantid (1.35%). Consequently, the highest number of Aphid (5.80), epilachna beetle (6.60), leaf roller (3.50), jassid (3.40) and whitefly (3.40) was found at 140 days after transplanting (DAT) on 170 days after sowing (DAS) while binjal shoot and fruit borer (0.45) was found at 130 DAT on 160 DAS. Subsequently, the highest number of ladybird beetle (13.85), black ant (4.0), dragonfly (1.15), spider (0.9) and preying mantid (0.95) was observed at 140 DAT on 170 DAS. Proper knowledge and monitoring of seasonal incidence and fluctuation of pest population and status of natural enemies are essential to manage the insect pest of brinjal.
Keywords: Seasonal incidence, Solanum melongena, phytophagous pests and beneficial arthropods
Post Time: 1 year ago
ABSTRACT: A chemodynamics study was undertaken to determine the pre-harvest interval (PHI) of the selected synthetic pyrethroid insecticide (cypermethrin 10EC) in eggplant. The study was conducted in the experimental farm and Pesticide Toxicology Laboratory of the Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during summer (February-June 2016). The fate of cypermethrin after application, consisted of receiving insecticide by eggplant plant and disseminating it to air and soil was evaluated. Cypermethrin residue was determined from eggplant and soil sample sprayed @ 1ml l-1 of water in the field and it was 0.022 mg/kg up to 7 days after spraying (DAS) and 0.107ppm up to 5 DAS individually. The quantities were above the CODEX maximum residue limit (MRL) up to 3 DAS (0.408 ppm & 0.461 ppm) both in eggplant and soil samples. When cypermethrin 10EC sprayed @ 2ml l-1 of water, the residue of cypermethrin was detected in soil and eggplant samples up to 0.028ppm at 7 DAS and 0.030ppm at 10 DAS, separately, where MRL exceeds at 5 DAS (0.421ppm) for soil sample and at 3 DAS (0.452ppm) for eggplant sample, respectively. The residue degradation observed at early period was lower (42.18% in eggplant and 27.95% in soil at 1 DAS, when cypermethrin was applied @ 1ml l-1 of water and conversely 40.83% in eggplant and 56.02% in soil at 1 DAS, when cypermethrin was applied @ 2ml l-1), however, at the later period it was higher (97.80%in eggplant and 89.13%in soil when cypermethrin was applied @ 1ml l-1 of water, these were 97.03% in eggplant and 98.67% in soil when cypermethrin was applied @ 2ml l-1 of water). The Pre-Harvest Interval (PHI) was found 04 days for cypermethrin in eggplant.
Keywords: Cypermethrin, chemodynamics, eggplant plant, pesticide residue.
Post Time: 1 year ago
ABSTRACT: Tea Camellia sinensis L. is an aromatic crop that has become the most popular non-alcoholic beverage drink for two-thirds of the world’s population. Bangladesh contributes almost 3.0% of global tea production with high export potential through increasing the production using proper management of insect and mite pests. Tea mosquito bug, termite, thrips and looper caterpillar are the major insect pests of tea and red spider mite (RSM) is the number one mite pest. RSM draws special attention to the tea planters because of its year-round presence causing 17 to 46% crop loss. The tea gardeners use a large number of broad spectrum synthetic pesticides to control major soil-dwelling pests (termite and other soil pests), sucking pests (thrips, jassid and scale insects), chewing pests (leaf roller, looper caterpillar and flush worm) and other minor pests. The overuse of highly toxic pesticides has incurred high pest management costs, killing beneficial arthropods, causing secondary pest outbreaks, pesticide residue and other complications in tea production. Adoption of Integrated Pest Management (IPM) programs could be possible solutions for these problems. The use of resistant varieties, timely adoption of cultural and mechanical practices (plucking, pruning, cleaning, sanitation, irrigation, drainage, weeding, etc.), physical practices (destruction of pests, yellow trap, light trap, etc.), biological control (conservation of predators, parasitoids), use of bio-pesticides, sex pheromones, entomopathogenic microbes (bacteria, virus, fungi), extracts of plant parts (neem seed kernel,mahogany, nishinda, ghato, michania, etc.) have been reported as eco friendly pest management techniques for RSM management. In this review paper, IPM strategies for major pests especially for RSM have been suggested.
Keywords: Tea mosquito bug, tea red spider mite, termite, thrips, looper caterpillar.
Post Time: 1 year ago
A comprehensive survey was conducted by extensive tour in Patuakhali, Barguna, Barisal, Jalokathi and Pirojpur coastal districts of Bangladesh to know the farmer’s perception on the insect pests attacking mung bean and their management practices adopted by them during January to April 2019. Results of survey revealed that among the respondents (farmer’s) the highest rate of mungbean farmers (66.00%) cultivated local mung bean variety followed by BARImung 6 (8.00%) and BARImung 5 (6.00%). Most (90.00%) of the mung bean growers opined that insect pests viz., flea beetle, leaf roller, whitefly, jassid, aphid, thrips and pod borer complex (Maruca sp and Helicoverpa sp.) attacked mung bean at different growth stages, among which flea beetle and pod borer were the most damaging insect pests. The rate of knowledge of farmers about mung bean insect pest infestation was 48.00% (thrips), 40.50% (aphid), 37.00% (leaf roller), 31.00% (white fly), 21.00% (jassids) and 15.50% (hairy caterpillar). Mung bean growers applied only chemical pesticides where majority (18.50%) of the growers sprayed virtako 40 WG followed by karate 2.5EC (13.80%) and voliam f lexi 300SC (12.50%) while 1.50% growers applied actara for the management mungbean insect pests.
Keywords: Farmers’ response, insect pest problems, pest management, pesticides
Post Time: 1 year ago
Rice is the staple food of Bangladesh grown in Aus, Aman and Boro seasons. Most of the cultivable lands are occupied by rice in Aman season. Insect pests are the major concern of rice cultivation. Different species of insects are found in rice field based on growing seasons and localities. The study was conducted in T. Aman season around Patuakhali Science and Technology University (PSTU) to know the prevalence and abundance of insect pests in T. Aman rice ecosystem. Sweeping net was used to collect the insect samples. The prevailing insect pests were rice bug (Leptocorisa acuta Thun.), green leafhopper (Nephotettix virescens Dis.), brown planthopper (Nilaparvata lugens Stal), short horned grasshopper (Hieroglyphus daganensis Krauss), long horned grasshopper (Tettigonia viridissima Krauss), leaf roller caterpillar (Cnaphalocrocis medinalis Guenee), green horned caterpillar (Melanitis leda Lin.), yellow stem borer (Scirpophaga incertulas Walker), rice caseworm (Parapoynx stagnalis Zeller), rice pollen beetle (Chiloloba acuta Wied.) and rice skipper (Pelopidas mathias Fab.). Among these pests, green leafhopper (51.96% relative abundance) and brown planthopper (21.79% relative abundance) were the most abundant while rice pollen beetle was the least abundant (0.565%). These insect pests belong to 9 different families under the orders of Hemiptera, Orthoptera, Lepidoptera and Coleoptera.
Keywords: Rice, Aman season, Insect pests, Prevalence, Relative abundance
Post Time: 1 year ago
ABSTRACT: The red pumpkin beetle (Aulacophora foveicollis) is the critical insect pests of sweet gourd according to their high relative abundance in the field. To evaluate the effectiveness of different biorational insecticides against red pumpkin beetle the present study was conducted in the experimental field of entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during January 2023 to June 2023. With average temperature of 25.8°C and relative humidity of 91.2% during experimental period, seven different biorational insecticides were applied for field evaluation. The treatments of the experiment were Neem oil, Mahogony oil, Bio-clean 5 SL (De-limonin 5%), Bio-action 1.5 SL (Matrine 1.5%), Biotrin 0.5 AS (Matrine 0.5%), Spinomax 44.03 SC (Spinosad 44.03% w/w), BiomaxM 1.2 EC (Abamectine 1.2%) with an untreated control (using water only) for comparison. The lowest abundance of red pumpkin beetle at early cropping stage (4.0) and late cropping stage (2.7); rate of infestation at early cropping stage (89.7%) and late cropping stage (91.3%); leaf area damage (10.0%) and late cropping stage (3.7%) was observed in Biotrin 0.5 AS treated plot. The lowest floral infestation (8.3%) was also observed in Biotrin 0.5 AS treated plot. Biotrin 0.5 AS performed better than other biorational insecticides in all the aspects of controlling red pumpkin beetle.
Keywords: Red pumpkin beetle, sweet gourd, biorational insecticides, Biotrin 0.5 AS.
Post Time: 1 year ago
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