http://localhost:8080/handle/123456789/3846 Sat, 18 Apr 2026 21:02:39 GMT 2026-04-18T21:02:39Z http://localhost:8080/handle/123456789/3870 BIORATIONAL MANAGEMENT OF LEAF FEEDING INSECT PESTS OF CABBAGE AKTER, ASMA An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October, 2020 to February, 2021 to evaluate the effectiveness of some biorationals against leaf feeding insect pests of cabbage. The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications. Six treatments, viz. T 1 (Spinomax 45SC @ 0.5 ml/L of water at 7 days interval); T (Biomax 1.2EC @ 2 ml/L of water at 7 days interval); T (Bioneem plus 1EC @ 3 ml/L of water at 7 days interval); T 4 ii 3 (Antario @ 2 g/L of water at 7 days interval); T (Fytomax @ 2 ml/L of water at 7 days interval) and T 6 5 (untreated control) were used. Among the management practices, the lowest percentage of leaf infestation of cabbage by tobacco caterpillar (9.58%) and jute hairy caterpillar (6.88%) was found in T treated plot that reduced the highest leaf infestation over control (72.73% and 68.67%, respectively); whereas the highest percentage infestation by tobacco caterpillar (35.13%) and jute hairy caterpillar (21.96%) was found in untreated plot (T 1 ). The lowest mean incidence of tobacco caterpillar (5.74 larvae/6 plants) and jute hairy caterpillar (4.15 larvae/6 plants) was found in T that reduced highest incidence over control (49.52% and 58.95%, respectively); whereas the highest values of all these parameters were achieved from untreated control treatment (T 6 1 ). The lowest cabbage head infestation (23.64%) was recorded in T 1 , that gave the highest yield of cabbage (75.80 t ha -1 ) that increased the highest yield over control (96.93%). From the above study, it was found that the treatment T comprised of Spinomax 45SC @ 0.5 ml/L of water at 7 days interval gave the highest performance compared to those of all other treatments used in the present study. Spinomax 45SC may be used for the management of leaf feeding insect pests of cabbage. A Thesis Submitted to the Department of Entomology Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN ENTOMOLOGY Fri, 01 Jan 2021 00:00:00 GMT http://localhost:8080/handle/123456789/3870 2021-01-01T00:00:00Z http://localhost:8080/handle/123456789/3869 BIORATIONAL MANAGEMENT OF SUCKING INSECT PESTS OF OKRA CHAKMA, PRIYANKUR The study was conducted to investigate biorational management of sucking insect pests of okra in the research field of Sher-e-Bangla Agricultural University, Dhaka during the period from October, 2020 to February 2021. The experiment consisted of the management practices (T 1 = Spinosad @ 0.5 ml/L of water; T = Matrine @ 1.0 ml/L of water; T 3 = Thiamethoxam @ 0.2 g/L of water; T ii 4 2 = Neem oil @ 5.0 ml/L of water with detergent; T 5 = Abamectin @ 1.0 ml/L of water; T = Buprofezin @ 0.2 g/L of water and T 7 6 = Untreated control) are applied at 7 days interval. The experiment was designed with Randomized Complete Block Design (RCBD) with three replications. Data on different pest incidence level of infestation, yield attributes and yield were collected and recorded. At total fruiting stage, in number basis, considering the % fruit infestation, the lowest infested fruits per plant were recorded from Buprofezin @ 0.2 g/L of water (33.62%), while the highest infested fruits were recorded in control (44.21%). The lowest plant infestation was found from Buprofezin (34.25%), whereas the highest infested plants were recorded in untreated control (46.33%). The tallest plant was recorded from neem oil (244.9 cm), while the shortest plant was found from Spinosad (195.2 cm). The highest yield of fruits was observed from Buprofezin @ 0.2 g/L of water at 7 days interval (15.59 ton/ha), while the lowest yield per hectare was found from control (11.36 ton/ha). Among the treatments, Buprofezin @ 0.2 g/L of water at 7 days interval was more effective for the controlling of insect pests as well as highest yield contributing characters and yield of Okra. A Thesis Submitted to the Department of Entomology Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN ENTOMOLOGY Fri, 01 Jan 2021 00:00:00 GMT http://localhost:8080/handle/123456789/3869 2021-01-01T00:00:00Z http://localhost:8080/handle/123456789/3868 MANAGEMENT OF MAJOR INSECT PESTS OF MAIZE IN RABI SEASON ALI, MD. NOYON The study was conducted in the research field of Sher-e-Bangla Agricultural University, Dhaka in order to study the major insect pests of maize and their management. There were seven treatments and three replications used in a randomized complete block design (RCBD). The treatments were T 1 (Success @ 0.5 ml/L of water at 7 days interval); T (Matrine @ 1 ml/L of water at 7 days interval); T 3 (Virtaco @ 0.2 g/L of water at 7 days interval); T (Neem oil @ 5 ml/L of water with detergent at 7 days interval); T (Emamectin Benzoate @ 1 ml/L of water at 7 days interval); T 6 viii 5 (Seed treatment with Fortenza+Sunfezin @ 0.2 g/L of water at 7 days interval); and T 7 (untreated control). Treatment T showed the lowest fall armyworm infestation 0.11 larvae per plot during 3 days after spray, 0.17 larvae per plot during 7 days after spray. Similarly, Treatment T 6 6 showed the lowest aphid infestation 14.54 aphids per piot during 3 days after spray, 9.06 aphids per plot during 7 days after spray. Lowest plant infestation (1.91% per plot) of stem borer was obatained from treatment T . in case of % dead heart, Fortenza+Sunfezin showed the lowest infestation i.e. 1.60%. The lowest number of insects was observed in treatment T 6 6 and produced the maximum yield. Seed treatment with Fortenza+Sunfezin was the most effective insecticide against pest complex of maize. A Thesis Submitted to the Department of Entomology Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN ENTOMOLOGY Fri, 01 Jan 2021 00:00:00 GMT http://localhost:8080/handle/123456789/3868 2021-01-01T00:00:00Z http://localhost:8080/handle/123456789/3867 NSECT PESTS OF LETTUCE AND THEIR BIORATIONAL MANAGEMENT ISLAM, MD. OBAIDUL The experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from 10 November, 2019 to 20 February, 2020 to record the insect pests of lettuce and to evaluate their biorational management practices. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. There were six treatments viz.; T 1 = Abamectin @ 1.0 ml/L of water, T 2 = Bacillus thuringiensis and abamectin @ 1.0 ml/L of water, T 3 = Spinosad @ 0.5 ml/L of water, T 4 = Azadirachtin @ 1.0 ml/L of water, T 5 = Potassium salt of fatty acid @ 1.0 ml/L of water and T 6 = untreated control were used at 7 day interval. Flea beetle (Monolepta signata Olivier), Tobacco caterpillar (Spdoptera litura Fabricius), Aphid (Lipaphis erysimi Kaltenbach), Jute hairy caterpillar (Spilosoma obliqua Walker), Grasshopper (Oxya velox Fabricius) and Red pumpkin beetle (Raphidopalpa foveicollis Lucas) were recorded. The lowest percent of leaf infestation (10.70, 4.67, 4.76, 5.07, 5.03 and 8.74% respectively) of Flea beetle, Tobacco caterpillar, Aphid, Jute hairy caterpillar, Grasshopper and Red pumpkin beetle were observed in T 3 (Spinosad 45SC) treatments as against the highest (26.93, 18.81, 18.22, 37.67, 24.70 and 26.93%) was observed in T 6 treatment (untreated control). The highest single (0.91 kg plant ii -1 ) and healthy plant weight (0.76 kg plant -1 ) and highest yield (16.43 ton ha -1 ) were observed in the same treatment (T 3 ). In contrast, the highest leaf infestation (21.50%), the lowest single plant weight (0.24 kg), healthy plant weight (0.29 kg plant -1 ) and lowest total yield (7.08 ton ha -1 ) were obtained from T 6 (untreated control). Spinosad 45SC @ 1.0 ml/L of water at 7 days interval gave the highest performance against insect pests of lettuce compared to all other treatments and may be used for the management insect pests of lettuce. A Thesis Submitted to the Department of Entomology Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN ENTOMOLOGY Fri, 01 Jan 2021 00:00:00 GMT http://localhost:8080/handle/123456789/3867 2021-01-01T00:00:00Z