http://localhost:8080/handle/123456789/2748 2026-04-18T16:16:48Z http://localhost:8080/handle/123456789/2855 BIOLOGY, PEST STATUS AND MANAGEMENT OF JACK FRUIT BORER, Diaphania caesalis (Walker) MRIDHA, SAKHAOYAD HOSSAIN Experiments were conducted in the farmers orchard of Gazipur district and in the laboratory and Fruit Farm of Bangladesh Agriculture Research Institute, Gazipur during January, 2005 to August, 2005 to study biology, pest status and management of jackfruit borer, Diaphania caesalis Walker From the study it was found that a female moth laid on an average 31 29 eggs and the incubation period was 4 5 days The larval period, pupal period and the adult longevity were on an average 12 01 days, 6.83 days, and 4 67 days respectively The highest fruit infestation was recorded in Joydebpur (30 64%) and the lowest was in Sreepur (21.28%). In Joydebpur, farmers were the most conscious (95 5%) about the attact of jackfruit borer and the least in Kapasia (48 4 %) In view of farmers observation and experience; Joydebpur farmers had the highest fruit infestation (53 78%) and the lowest in Sreepur (28 96%) At 15 days after fruit setting (DAFS) the fruit infestation was the lowest while the infestation reached its peak at 60 DAFS at all locations. Fruit infestation level declined gradually from 60 DAFS to 120 DAFS Among the different control measures evaluated against jackfruit borer; the lowest infestation was obtained from bagging treatment (3 18%) followed by neem oil spray (3 94%)and there was no significant difference was observed between bagging and neem oil treatments. DEPARTMENT OF ENTOMOLOGY SHER- E- BANGLA AGRICULTURAL UNIVERSITY SHER-E-BANGLA NAGAR, DHAKA - 1207 2006-01-01T00:00:00Z http://localhost:8080/handle/123456789/2837 INTENSITY OF INFESTATION AND MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER (Leucinodes orbonalis Guenee) IN KHARIF SEASON AKTER, AYESHA An experiment was conducted at the Sher-e-Bangla Agricultural University (SAU), Dhaka, during January to July, 2005 to observe the infestation level and to evaluate the effectiveness of different management practices against brinjal shoot &fruit borer, Luc inodes orbonalis Guenee Seven treatments comprising mechanical & cultural control with different combinations of three promising insecticides eg, Sumialpha 5EC, Suntap 50WP and Furdan 5G were tested on a local brinjal variety “Khat khatia” laid out in RCBD with 3 replications Highest infestation of shoot (17%) & fruit (63% by wt & 75% by no ) was observed in the control plot, which was significantly highest from all other treatments. Treatment 6 consisting of mechanical & cultural control + Suntap 50WP @ 1 g/1 & Sumialpha 5EC @ I ml/1 of water at 5% infestation level gave the best performance resulting significantly lowest shoot (6%) & fruit (25%) infestation confirming highest yield (20 96 ton/ha). Treatment 3 -Furadan 5G @ 1.5 kg ai/ha single application + Sumialpha 5EC @ lml/1 of water at 7 days intervals also gave statistically similar results. The intensity of fruit infestation by BSFB was higher at later stages of crop growth for all the treatments A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2006 2006-06-01T00:00:00Z http://localhost:8080/handle/123456789/2836 MANAGEMENT OF SUCKING AND CHEWING PESTS OF HILL COTTON, Gossypium arboreum Linn. IN JHUM CULTURE MARMA, MONG SANUE Hill Cotton (Malvaceae, Gossypium arboreum Linn.) is an important cash crop grown by the tribal farmers on hill slopes in the Chittagong Hill Tracts, usually as a component crop in Jhum cultivation (traditional shifting cultivation). Farmers sow the cotton seed together with other crops, eg. rice, maize, ginger, turmeric, banana, sesame, cassava and various fruits (Farid and Mujibullah.1990). A variety of pests are responsible for reducing the growth and yield of hill cotton. Among the insects pests sap-sucking species like cotton aphid (Homoptera. Aphididae, Aphis gossypii Glover), Jassid (Homoptera, Cicadellidae, Amrasca biguttula Ishida), Whitefly (Homoptera, Aleyrodidae,Z?t'me‟.s/a tabaci Gennadius), Red Cotton Bug (Hemiptera. Pyrrhocoridae, Dysdercus cingulatus Fabricius) and chewing insects like the spotted bollworm (Lepidoptera, Noctuidae, Earias vittella Fabriciav) are the most damaging (Bohlen, 1984/85). This study evaluated the effect of two pesticides and a fungicide on the productivity of hill cotton in Jhum cultivation. A randomized complete block design experiment was conducted in the experimental fields of Hill Cotton Research Station, Balaghata, Bandarban Hill District to compare the effectiveness of a botanical pesticide (Neembacidin) and a synthetic organophosphorus insecticide (Roxiban 20EC) for the management of the infestation and damage by the above insect pests. Both products significantly reduced the number of psets; however, Neembacidin (derived from the tree. Azadirachta indica A.Juss, Meliaceae) provided better control of insect pests than Roxiban 20EC. The effectiveness of fungicide, Vitavax-200. was also evaluated for its role in cotton seedling emergence and mortality. Use of Vitavax-200 was found to have no effect on seedling emergence, but it significantly reduced subsequent seedling mortality in treated fields in comparison with the untreated controls. The results of the present experiment denoted that timely use of a fungicide, Vitavax-200 and a botanical pesticide, Neembacidin may prove to be of immense practical value for improving the production of hill cotton. Gossypium arboreum Linn, in the Chittagong Hill Tracts. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2006 2006-06-01T00:00:00Z http://localhost:8080/handle/123456789/1184 EFFECTIVENESS OF SOME INSECTICIDES FOR THE CONTROL OF MUSTARD APHID Lipaplais erysimi kalt. AND THEIR EFFECTS ON PREDATOR Coccinella septempunctata L. SIKDER, MOHAMMAD MAHBUB HASAN Studies were made in the field and laboratory condition to investigate the effects of insecticides viz.• Diazinon. Fenitrothion, Cypermethrin and Chlorpyrifos against mustard aphid Lipaphis erysirni (Kalt) and their toxicity to the predator Coccinella scpecnzpuncwla L. during the period from November 2004 to February 2005 at the Sher-e-l3angla Agricuhural University farm, Dhaka. The experimeni was laid out in a randomized block design and replicated five times. Insecticides were sprayed @ 0.05% on 27 December 2004 and on 12 January 2005. Records on control of mustard aphid and toxic effect to the predator under the different treatments were made at 1,4 and 7 days after first and second spraying of insecticides. Data on seed yield and yield parameters were taken at maturity. The percent reduction of aphid infested plant, percent reduction of aphid population and percent reduction of the predator varied significantly. Most of the crop characters and seed yield were significantly different due to usage of insecticides. Larva of C. sepiempuzciata consumed on an average 224.60 aphids during its 10 days of larval period and adult beetle consumed on an average of 885.40 aphids during 30 days period after emergence. The mortality of aphid, larvae and adult of the predator were significantly different. Mortality of the aphid reached highest after 24 hours of spraying. Cypermethrin was the most effective insecticide causing the highest mortality of mustard aphid and less toxic to the predator. Cypermethrin showed higher effectiveness than other three insecticides in increasing growth parameters and seed yield of mustard. Considering benefit cost ratio (BCR). Cypermethrin was found most economic and effective insecticide in controlling L. wjsitni. The overall effectiveness of Cypenncthrin on mustard aphid and predator were found to be the best. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulJIllinent of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2006 2006-06-01T00:00:00Z