http://localhost:8080/handle/123456789/2772 2026-04-18T16:31:26Z 2026-04-18T16:31:26Z FERDUS, JANNATUL http://localhost:8080/handle/123456789/2565 2019-10-17T12:00:33Z 2017-01-01T00:00:00Z

INCIDENCE OF MAJOR INSECT PESTS OF OKRA AND THEIR MANAGEMENT FERDUS, JANNATUL The experiment was conducted in the field of Sher-e-Bangla Agricultural University farm, Dhaka, Bangladesh during October 2017 to January 2018. The experiment consists of eight treatments such as T 1 = Actara 25 WG @ 1g/Litre of water sprayed; T = Neem oil @3ml/Litre of water mixed with 10ml of trix liquid sprayed; T ii 3 2 = Water based neem seed kernel extract @ 5g/Litre of water sprayed; T 4 = Bioneem plus 1.0EC @ 1ml/Litre of water sprayed; T = Ostad 10 EC @ 2ml/Litre of water sprayed; T 6 = Sevin 85 WP @ 1.2g/ Litre of water sprayed; T = Marshal 100EC @ 1.5ml/ Litre of water sprayed; T =Untreated control. The experiment was laid out in Randomized Complete Block Design 1 8 treatment. In case of leaf infestation, the lowest percent leaf infestation was caused by whitefly 1 treatment. Beside this, natural enemies also observed in the research field such as, the highest lady bird beetle 1 treatment and the lowest lady bird beetle treatment during the study period . The highest okra yield 1 1 treatment. These findings illustrated that, the Actara 25 WG treatment was more effective for the reduction of incidence of major insect pests of okra. DEPARTMENT OF ENTOMOLOGY SHER-E-BANGLA AGRICULTURAL UNIVERSITY SHER-E-BANGLA NAGAR, DHAKA, BANGLADESH

2017-01-01T00:00:00Z SARKER, NITAI CHANDRA http://localhost:8080/handle/123456789/2564 2019-10-17T12:00:59Z 2017-01-01T00:00:00Z

INCIDENCE AND DAMAGE SEVERITY OF CHEWING INSECT PESTS AND FRUIT FLY ON BOTTLE GOURD AND THEIR MANAGEMENTS SARKER, NITAI CHANDRA The experiment was conducted in the central farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from September, 2017 to May, 2018 to assess the incidence and damage severity of chewing insect pests and fruit fly on bottle gourd and their managements. BARI Lau 4 were used as the test crop for this study. The experiments consists of different management practices as treatment and they were T 1 : Mechanical and Cultural practices at 7 days interval, T 2 : Field sanitation + Spraying Sevin 85 SP @ 1.5 g/L of water at 7 days interval, T 3 : Spraying Folithion 50 EC @ 1.12 ml/L of water at 7 days interval, T 4 : Mechanical control + Spraying Rogor 40 L @ 1.0 ml/L of water at 7 days interval, T 5 : Spraying Dizol 60 EC @ 1.0 ml/L of water at 7 days interval, T 6 : Field sanitation + Spraying Proclaim 5 SG @ 1.0 g/L of water at 7 days interval and T 7 : Untreated control. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Red pumpkin beetle, epilachna beetle, green leaf eating caterpillar, cutworm, grasshopper and fruit fly were observed during the study period. At vegetative and reproductive stage, the lowest leaf infestation (3.49% and 5.38%) was observed from T 4 treatment, whereas the highest infestation (15.56% and 15.02%) in T 7 treatment. In number and weight basis at early, mid and late fruiting stage the lowest fruit infestation (2.67% and 4.40%, 2.22% and 5.97%, 3.13% and 5.13%) was observed from T 4 treatment, whereas the highest infestation (10.65% and 10.53%, 10.15% and 16.24%, 11.92% and 14.54%) in T 7 treatment. The highest healthy fruit yield (69.96 t/ha) was recorded from T 4 , whereas the lowest (57.32 t/ha) from T 7 treatment. From the above findings it can be concluded that among the treatments, T 4 (Mechanical control + Spraying Rogor 40 L @ 1.0 ml/L of water at 7 days interval) may be revealed as the best treatments in respect of higher healthy fruit yield by reducing leaf and fruit infestation of bottle gourd. DEPARTMENT OF ENTOMOLOGY SHER-E-BANGLA AGRICULTURAL UNIVERSITY DHAKA-1207

2017-01-01T00:00:00Z NASIF, SAIFULLAH OMAR http://localhost:8080/handle/123456789/2563 2019-10-17T12:01:13Z 2017-01-01T00:00:00Z

COMPARING INCIDENCE AND INFESTATION OF INSECT PESTS IN BT AND NON-BT BRINJAL AND THEIR CHEMICAL MANAGEMENT NASIF, SAIFULLAH OMAR This study compared the incidence and infestation of the major insect pests and their susceptibility to insecticides in two different genotypes of brinjal; BARI Bt brinjal 2 and BARI brinjal 4. The experiment was conducted on central farm of Sher-eBangla Agricultural University, Dhaka in rabi season 2017-18. The experiment used a completely randomized 2 x 4 factorial design, with four replications. The first factor refers to the corresponding Bt and non-Bt brinjals, and the second factor refers to the different chemical treatments (imidacloprid 0.5 mlL -1 water, Spinosad 0.4 mlL -1 water, malathion 2 mlL -1 water and control). Both the varieties showed lower infestation in vegetative stage and peak infestation in reproductive stage. Results revealed that the lowest population of sucking pests such as jassid, aphid and whitefly (6.41, 8.22, 6.52 and 10.8, 8.33, 8.45 per six leaves at vegetative and fruiting stage respectively) occurred in non-Bt brinjal and from imidacloprid. Spinosad and Bt brinjal showed higher efficiency in controlling epilachna beetle and brinjal shoot and fruit borer (1.25 plants -1 , 0.93% and 1.31 plants , 2.71% in shooting and fruiting stage respectively). So, imidacloprid and spinosad can be used in controlling sucking pests and chewing pests of brinjal respectively. DEPARTMENT OF ENTOMOLOGY SHER-E-BANGLA AGRICULTURAL UNIVERSITY DHAKA-1207

2017-01-01T00:00:00Z RAHMAN, MD. MEZBAH UR http://localhost:8080/handle/123456789/2562 2019-10-17T12:01:38Z 2017-01-01T00:00:00Z

STUDY ON BIOLOGY AND EFFECTIVENESS OF SOME CHEMICAL INSECTICIDES AGAINST JUTE HAIRY CATERPILLAR, SPILOSOMA OBLIQUA (WALKER) RAHMAN, MD. MEZBAH UR Study on biology of jute hairy caterpillar, Spilosoma obliqua (walker) and insecticidal tests were made in the laboratory and in the field of Central station, Bangladesh Jute Research Institute (BJRI), Dhaka and JAES, Manikganj during March to September, 2017. The study revealed that the incubation period was 5.5 ± 0.29 day, total larval period of jute hairy caterpillar was 19.91 ± 0.47 days, pupal period 9.83 ± 0.42 days, eggadult (female) 42.67 ± 0.69 days and egg-adult (male) 38.67 ± 0.75 days. The preoviposition and oviposition periods were 1.42 ± 0.15 days and 3.5 ± 0.29 days respectively. The longevity of female and male moths was 7.41 ± 0.34 days and 3.42 ± 0.26 days. Treatment with Quinalphos: Mekalux 25EC gave the best performance with more than 95% mortality followed by Spinosad: Base 45SP. Emacto 5WDG @ 1.5 kg/ha, Fusion @ 500ml/ha, Rescue 6WDG @ 250/ha, Hayron 5EC @ 500ml/ha, Base 45SP @ 250 ml/ha, Perfect 30 WDG @ 100gm/ha and Mekalux 25EC @ 1.5/ha performed more than 85% mortality of jute hairy caterpillar. All selected doses of insecticides showed more than 80% reduction of plant infestation over control in both two locations Central station, BJRI, Dhaka and JAES, Manikganj. The result of trial in two locations clearly indicated that all the insecticides were effective against jute hairy caterpillar. The application of insecticides had effects on plant height, base diameter and fibre yield of jute in the field. DEPARTMENT OF ENTOMOLOGY SHER-E-BANGLA AGRICULTURAL UNIVERSITY SHER-E-BANGLA NAGAR, DHAKA-1207, BANGLADESH

2017-01-01T00:00:00Z