http://localhost:8080/handle/123456789/2758 2026-04-18T16:17:04Z http://localhost:8080/handle/123456789/2840 DEVELOPMENT OF ARTIFICIAL LARVAL DIET AND OPTIMIZATION OF STERILE MALE RATIO OF ORIENTAL FRUIT FLY, BACTROCERA DORSALIS (HENDEL) ZAHAN, ASRIN A study was conducted to develop artifitial larval diet and optimization of the sterile male ratio of oriental fruit flies, Bactrocera dorsalis (Hendel) for possible field application of Sterile Insect Technique (SIT). Population fluctuations of the fruit fly were monitored in Atomic Energy Research Establishment campus, Ganakbari, Savar, Dhaka from January 2012 to December 2012 using methyl eugenol baited Mcphail traps. High level of fruit fly population was found throughout the year in all the study areas except February. Mean monthly capture was highest in May. Different ratios between irradiated and unirradiated male of fruit flies were allowed to mate with a fixed number of unirradiated females of fruit flies in different cages to find out the rate of suppression against wild population. In case of efficiency of artifitial larval diet the highest hatching percentage and the lowest larval duration was observed from the 4.87-4.89 pH. But based on the highest number of pupae, percent flier, percent adult emergence and lowest pupal duration, diet having 5.22-5.26 pH was found to be economical and suitable for mass scale rearing of B. dorsalis. Radiosensitivity of pupae was found to be decreased as age increased. Highest pupal duration and no normal adults were found after imposing gamma radiation in 5-days old pupae treated with 60 Gyga dose. Radiation significantly increased the unemergence and decreased the normal emergence of fruit fly. The sterilizing doses were recorded as 60 Gy for 5-days old pupae. The 1:9 ratio of unirradiated male and irradiated male was found as the best for suppression of wild population of B. dorsalis in both laboratory and field trials. A Thesis Submitted to the Department of Entomology Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2012 2012-12-01T00:00:00Z http://localhost:8080/handle/123456789/1338 PERFORMANCE OFTRICHOGRAMMA EVANESCENSFOR ECO-FRIENDLY MANAGEMENT OF LEPIDOPTEROUS INSECT PESTS OF CABBAGE GOSWAMY, SANJIB KUMAR A field experiment was conducted in the experimental farm of Sher-e-Bangla Agricultural University, Bangladesh during the period from October 2011 to March 2012 to evaluate the performance of Trichogramma evanescens for eco-friendly management of Lepidopterous insect pests of cabbage. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications and nine treatments viz. T1 (Tricho Paper Card @ 0.20 g/plot at 5 days interval), T2 (Tricho Paper Card @ 0.30 g/plot at 5 days interval), T3 (Tricho Paper Card @ 0.40 g/plot at 5 days interval), T4 (Tricho Paper Card @ 0.50 g/plot at 5 days interval), T5 (Tricho Paper Card @ 0.20 g/plot at 10 days interval), T6 (Tricho Paper Card @ 0.30 g/plot at10 days interval), T7 (Tricho Paper Card @ 0.40 g/plot at 10 days interval), T8 (Tricho Paper Card @ 0.50 g/plot at10 days interval) and T9 (untreated Control). It was observed that T4 treatment performed best in managing lepidopterous insect pests of cabbage based on the lowest % leaf infestation (27.70), lowest number of holes /leaf of a plant (3.30), lowest number of larva (3.50), lowest (%) leaf area damage (1.20), lowest % head infestation by number (10.50) and highest % infestation reduction over control on all parameters at vegetative stage of plant. Again, the lowest leaf infestation intensity (7.40%), lowest number of holes / infested head (13.00), lowest number of larva / infested head (1.30), lowest % infestation of head by number (3.30), lowest % head infestation by weight (1.70) were achieved at harvesting stage from the same treatment (T4) whereas the highest values of all these parameters was achieved from untreated Control treatment (T9) . The yield contributing characters provided best performance in yield which found in T4 where yield was increased (105 %) over control giving maximum yield 93.70 ton/ha. Form the study it was found that there is a strong negative relationship between leaf infestation intensity and single head weight and between leaf infestation intensity and yield (t/ha). It also observed that there is a strong positive relationship between number of larvae and leaf infestation intensity, between number of larvae and leaf area damage of cabbage and between number of larvae/infested head and numbers of holes/infested head. A Thesis Submitted to theDepartment of Entomology, Faculty of Agriculture, Sher-e-BanglaAgricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN ENTOMOLOGY SEMESTER: JULY-DECEMBER,2012 2012-12-01T00:00:00Z http://localhost:8080/handle/123456789/1337 USE OF PLANT MATERIALS FOR THE MANAGEMENT OF SUCKING INSECT PESTS OF OKRA SHIL, SAUTAM KUMAR The present experiment was conducted at the field laboratory of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from April to August, 2011 to find out the efficacy of different plant materials against sucking pest of okra. The treatments comprised seven botanical products, one synthetic chemical insecticide and one untreated control and these were T1 = Ripcord 10EC @ 1 ml/L of water, T2 = Tamarind fruit juice @ 100 g/4L of water, T3 = Neem leaf extract @ 0.5 kg/4L of water, T4 = Bullock’s heart leaf extract @ 0.5 kg/4L of water, T5 = Dodder extract @ 0.5 kg/4L of water, T6 = Oleander leaf extract @ 0.5 kg/4L of water, T7= Dhutra leaf extract @ 0.5 kg/4L of water, T8 = Dholkolmi leaf extract @ 0.5 kg/4L of water, T9 = Control. Plant extracts and insecticide were applied at 7 days interval. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Among the treatments, oleander leaf extract gave the highest percent reduction of aphid infestation (21.69%) over control. Dhutra leaf extract gave the highest percent reduction of jassid infestation (35.42%) over control. Ripcord showed the best efficacy by reducing 66.35% and 31.31% population of mealybug and whitefly, respectively over control. Considering plant and yield related attributes, dholkolmi leaf extract increased the highest percent of plant height (18.21%), leaf per plant (19.81%) and number of branch per plant (39.17%), where neem leaf extract and bullock’s heart leaf extract respectively showed the least performance. Similarly, highest number of fruit per plant, fruit weight, fruit length and fruit diameter (9.83 g, 29.33 g, 15.06 cm and 6.60 cm, respectively) was obtained by application of dhutra leaf extract, tamarind fruit juice and neem leaf extract respectively with the increase of 40.85%, 28.58%, 17.18 % and 30.09 % over control, whereas neem leaf extract (9.73%), dodder extract (11.45%), bullock’s heart leaf extract (23.20%) and dhutra leaf extract (18.07%) showed the least performance. Finaly, the highest yield increase over control was achieved in bullock’s heart leaf extract (40.35%), whereas the lowest increase showed in ripcord (24.34%). All plant materials have great impact on okra yield attributing character and better impact on aphid and jassid and moderate effect on other sucking pests. A Thesis Submitted to the faculty of Agriculture, Sher-e-BanglaAgricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN ENTOMOLOGY SEMESTER:JULY-DECEMBER, 2012 2012-12-01T00:00:00Z http://localhost:8080/handle/123456789/1336 EFFECTIVENESS OF DIFFERENT PHEROMONE-TRAP DESIGNS FOR MANAGEMENT OF CUCURBIT FRUIT FLY, BACTROCERA CUCURBITAE (Coquillett) HOSSEN, MD. SHAHRIAR A field experiment was conducted at Sher-e-Bangla Agricultural University farm to find out the effectiveness of different pheromone-trap design for management of cucurbit fruit fly during January to July 2012. The treatments of the experiment were, T1 = Pheromone trap (Conventional ), T2 = Pheromone trap with adhesive, T3 = Pheromone trap with funnel, T4 = Pheromone trap with adhesive + Bait trap, T5 = Pheromone trap with funnel + Bait trap, T6 = Pheromone trap with adhesive + Bait trap + Polybag and T7 = Untreated (Control). The experiment was laid out in a Randomized Complete Block Design with three replications. Among the treatments the Pheromone trap with funnel +Bait trap(T5) showed the best performance in controlling cucurbit fruit fly. Consequently highest yield (38.44 t/ha),highest healthy fruit (35.23 t/ha) and lowest infested fruit(3.21 t/ha) were achieved from the treatment. Also the highest number of fruit fly was trapped in T5 at early,mid and late fruiting stage while lowest performance showed by T1.The performance of Pheromone trap with funnel(T3) was superior to other treatments but significantly lower than T5 treatment. The experiment revealed that pheromone trap with funnel could be effectively utilized in fruit fly management. 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: JUNUARY-JUNE, 2011 2012-12-01T00:00:00Z