Year 2018

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BIOLOGY AND DAMAGE ASSESSMENT OF PAPAYA MEALYBUG, PARACOCCUS MARGINATUS
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) AFROZE, MARINA
Two experiments were conducted to study the biology and damage assessment of papaya mealybug. Biology of papaya mealybug studied in the laboratory of the department of Entomology and damage assessment was conducted in the farm, Sher-e- Bangla Agricultural University, Dhaka-1207 during June, 2017 to August, 2018. In damage assessment study, T is covered with fine net and sprayed with imidacloprid, at 15 days interval to avoid mealybug infestation and T was infested by mealybug. The adult female laid 97-150 eggs with an average 122.8. The ovipositional period and incubation period was 6.0 ± 1.22 days and 5.8 ±1.09 days respectively. The female has three instars and male has four instars nymphs. At 1 2 instar male and female could not be distinguished. The average duration, length and breadth of 1 st instar nymph were 4.8± 0.83 days, 0.41± 0.08 mm, and 0.25 ± 0.03 mm. The average duration of 2 nd , 3 rd instar female nymph and adult female was 4.2±0.83 mm, 3.4±0.54 mm and 10± 2 days respectively. The average length of 2 nd , 3 rd female nymph and adult female was 0.69± 0.03 mm, 1±0.14 mm and 1.94±0.27 mm respectively. The average breadth of 2 , 3 rd female nymph and adult female was 0.44±0.02 mm, 0.72±0.05 mm and 1.38 ±0.05 mm respectively. The average duration of 2 nd , 3 rd instar, pupa and adult male was 3.6± 0.54 days, 2.8 ± 0.83 days, 3.6 ±0.54 days and 2.4 ±.54 days respectively. The average length of 2 instar, pupa and adult male was 0.70±0.06 mm, 0.85±0.02 mm, 0.94±0.04 mm and 0.98 ±0.03 mm respectively. The average breadth of 2 nd , 3 rd instar, 4 th instar and adult male was 0.38 ±0.04 mm, 0.41 ±.02 mm, 0.26 ±0.03 mm, and 0.26±0.01 mm respectively. Mealybug infestation reduced plant height (34.35%), number of leaves per plant (86.08%), petiole length (53.31%), number of flowers per plant (86.23%), number of fruits per plant (89.43%), individual fruit weight (88.01%) as well as total fruit yield per plant (98%). nd 1 st nd , 3 rd
BIOLOGY AND PREDATION EFFICIENCY OF LADYBIRD BEETLE ON MUSTARD APHID
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) SIDDIQUE, MD. ABUBAKAR
A laboratory experiment was conducted in the central laboratory of Sher-e-Bangla Agricultural University to find out the biology and predation efficiency of ladybird beetle on mustard aphid. Zigzag ladybird beetle st , 2 nd , 3 rd , 4 th instar grub period, pupal period, adult male and female longevity and ovipositional period of female for zigzag ladybird beetle were 2-3, 1-2, 1-3, 2-3, 2-3, 3-5, 17-22, 19-25 and 19-27 days, respectively; for black ladybird beetle 2-3, 1-2, 1-3, 2-3, 2-3, 3-5, 17-23, 20-25 and 18-27 days, respectively and 5-7, 2-3, 2-4, 3-5, 3-5, 6-10, 27-33, 31-36 and 30-41 days, respectivelyfor transverse ladybird beetle. The length of egg, 1 st , 2 nd , 3 instar grub, pupa and adult male and female were 0.92-1.12, 1.45-2.50, 2.6-3.8, 3.17-5.52, 5.6-7.5, 3.8-5.2, 3.8-4.4 and 4.1-5.4 mm, respectively for zigzag ladybird beetle; 0.96-1.15, 1.502.35, 2.35-4.15, 4.07-5.85, 5.5-6.84, 3.9-5.3, 3.8-4.6 and 4.16-5.5 mm, respectivelyfor black ladybird beetle; and 1.15-1.36, 1.66-2.23, 3.2-3.98, 4.81-6.07, 5.77-7.9, 5.0-6.6, 5.0-5.4 and 5.35-6.7 mm, respectivelyfor transverse ladybird beetle. The breadth of egg, 1 st , 2 nd , 3 rd , 4 th instar grub, pupa and adult male and female were 0.45-0.50, 0.45-0.6, 0.57-0.98, 1.4-2.25, 1.4-2.25, 3.0-4.1, 3.0-3.6 and 3.4-4.1 mm, respectivelyfor zigzag ladybird beetle; 0.47-0.50, 0.45-0.65, 0.59-1.1, 1.51-2.27, 1.51-2.27, 3.0-4.2, 3.0-3.9 and 3.25-4.8 mm, respectivelyfor black ladybird beetle and 0.46-0.54, 0.51-0.7, 0.9-1.2, 1.632.6, 1.63-2.6, 3.7-4.9, 3.8-4.2 and 3.9-5.0 mm, respectivelyfor transverse ladybird beetle. The predation efficiency of male and female of zigzag, black and transvers ladybird beetle were 847-899 and 972-1010; 835-915 and 958-1020; and 2073-2394 and 24032825 aphids, respectively. In case of predation efficiency, transvers ladybird beetle showed the best performance and zigzag and black ladybird beetle showed more or less similar. But the host range or diversity capacity of zigzag and black ladybird beetle were same and highest than transvers ladybird beetle. rd , 4 th
COMPARATIVE STUDY FOR THE MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER AND EPILACHNA BEETLE WITH BOTANICALS AND SOME SELECTED CHEMICAL INSECTICIDES
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) MALLIK, HAPPY
A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the effective as well as hazards free management practice(s) of brinjal, cultivated during Rabi season (November, 2017 to March, 2018). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental treatments were T 1 comprised of spraying of neem oil @ 3 ml neem oil and 10 ml trix mixed with 1 liter of water @ 7 days interval; T 2 comprised of spraying of neem seed kernel extract @ 5.0 ml/L of water at 7 days interval; T 3 comprised of spraying of bioneem plus @ 3.0 ml/L of water at 7 days interval; T 4 comprised of spraying of Marshal 25 EC@ 3.0 ml/L of water at 7 days interval; T 5 comprised of spraying of Ripcord 20 EC @ 1.0 ml/L of water at 7 days interval; T 6 comprised of spraying of Imitaf 20 SL @ 0.1 ml/L of water at 7 days interval; T 7 comprised of spraying of Actara 25 WG @ 0.2 gm/L of water at 7 days interval; T 8 comprised of untreated control. Treatment T 7 contributed to reduce the highest number of brinjal shoot and fruit borer (2.17 brinjal shoot and fruit borer/plant), number of bore (1.12 bores/five fruits), number of infested shoot (2.08 infested shoot/five plants), number of infested fruits caused by BSFB (1.39 fruit/plant), percent fruit infestation at early fruiting stage (4.93%), mid fruiting stage (10.00%) and late fruiting stage (13.84%) in number and early fruiting stage (19.52%), mid fruiting stage (16.11%) and late fruiting stage (15.31%) in weight, number of epilachna beetle (1.14 epilachna beetle/plant), percent leaf and plant infestation by epilachna beetle (9.20%) and (8.33%), percent of edible portion of infested fruit (90.49%), single fruit weight (39.00 gm) and yield (35.36 ton/ha). T 1 also contribute to reduce the incidence of infestation by considering the above mentioned parameters. The yield found in the T 1 treated plots was 28.58 ton/ha. Considering the environmental hazard and effect of incidence of beneficial arthropods T 1 was the best treatment against brinjal shoot and fruit borer and epilachna beetle of brinjal.
DAMAGE POTENTIALITY AND ECO-FRIENDLY MANAGEMENT OF RED PUMPKIN BEETLE AND CUCURBIT FRUIT FLY ON SQUASH VEGETABLE
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) MIAH, MOHAMMAD RUBEL
The experiment was conducted to study the damage potentiality and eco-friendly management of red pumpkin beetle and cucurbit fruit fly on squash during the period from October, 2018 to March, 2019. The experiment consisted of seven different treatments vizT = Cultural method 2 1 = Applying Sevin 50 WP @ 1.5g/pit + using vineger trap.T = Mechanical control method at 7 days interval + using Pheromone trap.T = Applying Sevin 50 [email protected]/pit+ Spraying Folithion 50 EC@ 1.0 ml/L of water at 15 days interval.T 4 = Spraying Pychlorex 20 EC @ 1.0 ml/L of water at 15 days interval + using Funnel Pheromone trap.T = Spraying Predator 50 EC @ 1.0 ml/L of water at 15 days interval + using mashed sweet gourd trap.T 6 = Untreated control. The experiment was laid out in Randomized Complete Block Design 7 -1 . The lowest percentage of leaf infestation and long petiole plant -1 4 was at 5, 15, 25, 35, 45 and 55 DAT. At 25,35,45 and 55DAT, the highest number of healthy flowers plant 4 -1 and the lowest percentage of infested flowers 4 4 . At 45 and 55DAT, the highest number of healthy fruit plant and lowest infestation was recorded from T . The highest control percentage of cucurbit fruit fly 5 . The highest single fruit weight 5 -1 -1 3 -1 was satisfactory for controlling Red pumpkin beetle and T manifested better result and control for Cucurbit fruit fly with desired yield contributing characters than the other 6 treatments. 5 -1 4 5 5
DEVELOPMENT OF EFFECTIVE INTEGRATED MANAGEMENT PACKAGE OF SWEET POTATO WEEVIL
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) NIPA, NURJAHAN
The present study on integrated management package of sweet potato weevil infesting sweet potato was conducted during rabi season (Nov-2017 to Mar-2018) in the experimental field of Department of Entomology at Sher-e-Bangla Agricultural University, Dhaka. The variety of sweet potato BARI Mistialu-8 was used as test crop. The experiment consisted of six treatments and one untreated control, they are T 1 : Sex pheromone trap + Earthing up one time + Mulching (straw) + One irrigation, T 2 : Sex pheromone trap + Earthing up two times + Two light irrigation , T 3 : Sex pheromone trap + Earthing up three times + Three light irrigation, T 4 : Earthing up two times + Sevin 85WP @ 3g\L of water at 15 days interval (2 times application), T 5 : Earthing up two times + Diazinon 10G @ 15 kg\ha (one time soil application), T 6 : Earthing up two time + Fenthion 2ml\L of water, T 7 : Untreated control. The experiment was laid out in Randomized Complete Block Design (RCBD) with three (3) replications. The result revealed that sex pheromone trap with earthing up three times and three light irrigation (T 3 ) showed the best control measure against sweet potato weevil compared to other treatments. Highest number of sweet potato weevil adult was found in T 7 (9.46 weevil/plot) and highest damage result was observed in T 7 (15.4%). Whereas the lowest number of adult weevil was observed in T 3 (0.392 weevil/plot) and lowest damage was noticed in T 3 (5.04%). At 15 days early harvest, in consideration of infestation level of storage tubers in number and weight basis, the lowest infestation was recorded from T 3 (3.68% and 5.68%), whereas the highest infestation (12.24% and 12.98%) was observed in T 7 . At optimum days harvest, for infestation level of tubers in number and weight basis, the lowest infestation was recorded from T 3 (4.49% and 6.48%), whereas the highest infestation (13.55% and 14.15%) was observed from T 7 treatment. After 15 days from optimum harvest, in case of infestation level of tubers in number and weight basis, the lowest infestation was recorded from T 3 (5.32% and 6.92%), whereas the highest infestation (16.35% and 17.04%) was observed from T 7 treatment. Besides, highest deformed tuber was found in T 7 (11.960%) and lowest in T 3 (2.362%). The highest yield was recorded from T 3 (41.87 t/ha), whereas, the lowest from T 7 (30.28 t/ha) treatment. These findings illustrated that, the Sex pheromone trap with earthing up three times and three light irrigation (T 3 ) treatment was more effective for controlling of sweet potato weevil.
ECO FRIENDLY PEST MANAGEMANT OF TOMATO
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) RAHMAN, ISTIKA
The experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207 during the period from October 2018 to March, 2019 to evaluate the ecofriendly pest management of tomato (BARI Tomato-14). The experiment consisted of six different ecofriendly treatment along with untreated control and was laid out in Randomized Complete Block Design (RCBD) with three replications. The seven treatments were T 1 = Untreated control, T = Neemoil suspension spray, T 3 = Garlic oil, T 4 = Black seed oil, T 5 2 = Marigold intercropping, T = Netting at seedling stage, T =Tobacco leaf powder extract spray. The data were statistically analyzed by MSTAT-C and means were separated by Duncan’s Multiple Range Test (DMRT) test at 5% levels of probability. Four insect pests were found in tomato cultivation viz. white fly, aphid, fruit borer and leaf miner. The lowest number of white fly per plant (3.13, 3.01 and 2.49) and the highest control percentage of white fly (87.89, 89.31 and 89.31) was observed in treatment T 7 at vegetative, flowering and reproductive stage. The lowest number of aphid per plant (1.20, 1.20 and 1.01) and the highest control percentage of aphid per plant (94.23, 94.41 and 94.98) was found from treatment T 2 2 at all stages of plant. At the vegetative, flowering and reproductive stage, the lowest number of fruit borer per plant (1.02, 1.61 and 0.90) and the highest control percentage of fruit borer per plant (90.04, 90.65 and 91.59) was found from treatment T 2 . The lowest number of leaf minerper plant (0.69, 0.60 and 0.65) in treatment T and the highest control percentage of leaf minerper plant (93.52, 87.27 and 84.69) was found from treatment T . Number of fruit, Individual fruit weightand yieldof tomato varied significantly due to different treatment and the highest yield (55.28 t ha 2 ) wasobtained from T 2 .Treatment T was the most suitable for controlling white fly, aphid, fruit borer and leaf minerand yield of tomato was also highest in treatment T 2 as compared to other 6 treatments. 2 2 6 -1
ECO-FRIENDLY MANAGEMENT OF SUCKING AND OTHER FOLIAR INSECT PESTS OF BRINJAL
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) BISWAS, SANJUKTA
A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the effective environment friendly management practice(s) of brinjal, cultivated during Rabi season (November, 2017 to March, 2018). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental treatments were T (spraying of neem oil @ 3 ml neem oil and 10 ml trix mixed with 1 liter of water @ 7 days interval); T 1 (spraying of neem seed kernel extract @ 5.0 ml/L of water at 7 days interval); T 3 2 (spraying of bioneem plus @ 3.0 ml/L of water at 7 days interval); T (spraying of Marshal 25 EC@ 3.0 ml/L of water at 7 days interval); T (spraying of Actara 25 WG @ 0.2 gm/L of water at 7 days interval); T 6 5 (spraying of Imitaf 20 SL @ 0.1 ml/L of water at 7 days interval); T 7 (spraying of Ripcord 20 EC @ 1.0 ml/L of water at 7 days interval) and T (untreated control). Treatment T contributed to reduce the highest number of leaf hopper, aphid, epilachna beetle, leaf roller, percent leaf infestation and plant infestation by leaf hopper, aphid, epilachna beetle, leaf roller were 5.72 leaf hopper/plant, 2.79 aphid/plant, 1.14 epilachna beetle/plant, 2.12 leaf roller/plant, 13.45%leaf/ five plant, 12.03 %leaf/ five plants, 9.20% leaf/five plants, 5.66% leaf/five plants, 13.89% plant/plot, 13.89% plant/plot, 8.33% plant/plot, 8.33% plant/plot respectively. Similarly, T 7 also contribute to reduce the number of leaf hopper (6.91), aphid (3.89), epilachna beetle (2.03), leaf roller (3.03), percent infestation of leaf and plant respectively by them. According to eco-friendly management T 1 showed the highly incidence of beneficial arthropods like lady bird beetle (5.21 lady bird beetle/plant), field spider (3.53 field spider/plant), ants (4.05 ants/plant) etc. in the brinjal field throughout the growing season. T 7 1 showed best performance for high single fruit weight (39.00 gm) and yield (25.57 ton/ha) of brinjal. T also showed more or less similar performance in case of single fruit weight (34.66 gm) and yield (24.59 ton/ha). Considering the environmental hazard and effect of incidence of beneficial arthropods T 1 was the best treatment against sucking and other foliage insect pests of brinjal. 1 4 8
EFFECT OF BIOPESTICIDES ON MAJOR INSECT PESTS OF CABBAGE AND THEIR NATURAL ENEMIES
(DEPARTMENT OF ENTOMOLOGY, 2018) BEGUM, AKLIMA
The study was conducted in the central farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during October 2018 to March, 2019 to know the effect of biopesticides on major insect pests of cabbage and their natural enemies. Six treatments were used under the experiment. They were T 1 = Spinosad, T 2 = SNPV (Spodoptera litura nuclear polyhedrosis virus), T 3 ii = Spodolure trap, T 4 = Spodolure trap + Spinosad spray, T 5 = Spodolure trap + SNPV spray and T 6 = untreated control. The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications. Results revealed that the lowest number of infested leaves by flea beetle (0.33/ 5 plants), tobacco cutworm (0.33/ 5 plants), semilooper (0.33/ 5 plants), diamondback moth (1.33/ 5 plants) and aphid (7.50/ 5 plants) were found in T 4 treatment (Spodolure trap + Spinosad). In case of incidence of natural enemies, the highest number of lady bird beetle (8.00/plot) and spider (8.60/plot) was also found from T 4 (Spodolure trap + Spinosad) treatment compared to untreated control. The highest percentage of healthy plants (91.67%), highest weight of healthy cabbge head plant -1 (1.20 kg), marketable cabbage head plot (19.48 kg) and marketable yield of healthy cabbage head (45.08 t ha ) was found in T 4 (Spodolure trap + Spinosad) treatment. Spodolure trap in combination with Spinosad spray may be considered as effective practice for the management of cabbage insect pests and conservation of natural enemies.
EFFECT OF BOTANICALS ON OKRA (Abelmoschus esculentus L.) ATTACKING INSECT PEST
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) HUDA, NAZMUL
The experiment was conducted in the field of Sher-e-Bangla Agricultural University, Dhaka during the period from mid April to August 2017 to find out the efficacy of different management against different okra pest. The treatments comprised four botanical products. These treatments are T 1 =untreated control ,T 2 = Spraying of Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T 3 = Spraying of 10ml garlic oil@ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T 4 = Spraying of 10ml black seed oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T 5 = Spraying of turmeric powder @ 200g/L of water at 7 days interval. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. The data were recorded on fruit and plant infestation by number, weight and length of individual fruit at early, mid and late fruiting stages; and yield related attributes as well as yield of okra. Spraying of Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval reduced highest aphid infestation at both vegetative (51.1%) and fruiting stages (54.1%). Highest reduction of plant infestation was (80.4%), highest shoot and fruit borer infestation reduction at different fruiting stage was (61.1%), highest jassid infestation at both vegetative and fruiting stages reduction was (47.2%) and (49.2%) respectively, highest white fly infestation at both vegetative and fruiting stages were (59.6%) and (59.8%) respectively. On the other hand it increased length of individual healthy fruit (16%), weight of individual healthy fruit (26.8%), and final yield of okra (41.2%). Considering Benefit Cost Ratio (BCR) and environment aspect, it may be suggested that neem oil may be suitable option than other control.
EFFECT OF INTERCROPPING ON THE INCIDENCE OF APHID POPULATION IN MUSTARD AND ITS IMPACT ON OTHER ARTHROPODS
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) SARKR, SAJIB
The experiment was conducted to study the effect of intercropping on the incidence of aphid population in mustard and its impact on pollinators during the period from October, 2017 to February, 2018. The experiment consisted of seven different treatments (each treatment was intercropping with mustard, Brassica napus) viz T = Mustard intercropped with cabbage (Brassica oleracea var. capitata); T = Mustard intercropped with onion (Allium cepa L.); T 3 2 = Mustard intercropped with garlic (Allium sativum L); T 4 = Mustard intercropped with black seed (Nigella sativa); T = Mustard intercropped with coriander (Coriandrum sativum L.); T 6 5 = Mustard intercropped with radish (Raphanus raphanistrum subsp. sativus) and T = Sole mustard as Untreated control. Sole trimming of mustard was additionally developed to think about the adequacy of intercropping framework. The design of experiment was randomized complete block design (RCBD) with three replications. From result it revealed that, when the number of aphid was lower (13.72) at mustard + coriander (T 7 ) at that time, total number of infested plant/plot (1.48), number of aphid infested branch/plant (1.58), percent of Branch infestation (19.65), percent of Flower infestation(44.38), percent of pod infestation (24.74) were decreased; on the other hand at that time total number of pod/branch (19.45), Number of different pollinators such as honeybee (Apis indica)/plant (4.28), wasp (2.26), syrphid fly (2.26); the presence of beneficial insects like lady bird beetle/plot (19.63); Number of healthy pod/plant (82.99) and grain yield per plot (454.74) was increased. The overall result indicates that the intercropping of mustard with onion, garlic, coriander and black seed/black cumin decreased the incidence of aphid population on mustard and increased the abundance of visiting different pollinators and other beneficial insect populations compared to sole cropping of (mustard). 5 1
EFFECTIVENESS OF SOME INSECTICIDES FOR MANAGEMENT OF POTATO INSECT PESTS
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) SULTANA, MST. MAHFUZARA
The present study was carried out on the effectiveness of some insecticides for management of potato insect pests. There were seven treatments such as T 1 (Pheromone Trap +Neem seed kernel extract), T 2 (Fipronil), T 5 (Pymetrozine + Nyten pyram), T 6 (Diazinon), T 3 (Carbofuran), T 4 (Cartap + Acetamiprid) and a check T 7 were evaluated on potato crop at the Sher-e-Bangla Agricultural University in Dhaka city during Rabi season from October 2017 to March 2018. The insecticides were applied at initial stage of crop growth and early mid stage of potato plants. The data were collected by counting cut plant by cutworm , by counting number of infested leaves by aphids by counting number infested tuber and weighing of infested tuber by cutworm, by counting the number of virus infected plants showing leaf roll and mosaic symptoms plant transmitted by aphids in each plot. The lowest number of cut plants was recorded in T 3 and T 6 (1) treatment and lowest in T 7 (6) . The lowest number of infested leaves was counted in T 1 (1.67%) and the highest number of infested leaves was recorded in T 7 (17.95%) . At 15, 40, 60 days after emergence of seedling, the lowest number of virus infected plants was 1.33, 1.67 and 2.33 counted in T 1 and the highest number of virus infected plants was 4.33, 12.00 and 20.67 recorded in T 7 respectively. The lowest number of infested tuber was counted in T 1 1.33) and the highest number of infested tuber was counted in T 7 (4.00). Average seasonal infestation was the lowest in T 1 (Pheromone trap + neem seed kernel extract) followed by T 6 (Cartap + Acetamiprid) and T 5 (Pymetrozine + Nyten pyram) the highest in check plot. (
EFFICACY OF DIFFERENT ECOFRIENDLY MANAGEMENTPRACTICES IN CONTROLLING CUCURBIT FRUIT FLY ON BITTER GOURD
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) IQBAL, MD. ASIF
The present study was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the efficient as well as risk free management practice(s) of cucurbit fruit fly infesting bitter gourd cultivated during Kharif I season (March 2017 to June 2017). There were five treatments. These were as follows T 1 = Spinosad, T 2 = Neem oil, T 3 = Poison bait trap, T 4 = Black seed oil, T 5 = Untreated control. The treatments :T 1 comprised of Spraying of spinosad @ .08 ml liter -1 of water at 7 days interval , T 2 comprised of Spraying of neem oil @ 3ml and 10 ml Trix mixed with 1 liter of water 7 days interval, T 3 comprised of setting up of poison bait trap @ 2 gm Sevin 85 WP mixed with 100 g mashed sweet gourd and 10 ml molasses and replaced at 4 days interval, T 4 comprised of black seed oil @ 5 ml with 10 ml Trix mixed with 1 liter of water applied at 7 days interval, T 5 comprised of Untreated control. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. Poison bait trap (T 3 ) produced the highest number of fruit at early (27.23 fruit/plot), mid (38.89 fruit/plot) and late (28.00 fruit/plot) fruiting stages; and reduced the maximum fruit infestation over control at early (93.66%), mid (91.63%) and late (85.44%) fruiting stage. Percent fruit infestation by weight at early (10.95%), mid (9.04%) and late (18.76%) and reduced maximum fruit infestation over control at early (83.79%), mid (81.27%) and late (78.65%) was also obtained in T 3 treated plot. The highest yield (24.03 t/ha) was recorded in T 3 which provided the highest yield (163%) over control. The highest benefit cost ratio (43.20) was also found from T 3 treated plot and the lowest BCR (14.91) obtained from T 5 Considering the social acceptance and environmental safely point of view, T 3 poison bait trap was the most effective management practices in reducing the fruit fly infestation and thereby increasing the yield of bitter gourd. treated plot.
EVALUATION OF DIFFERENT TRAPS AND SOME NONCHEMICAL OPTIONS AGAINST THE INFESTATION OF FRUIT FLY AND RED PUMPKIN BEETLE ON RIDGE GOURD
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) RAHMAN, MD. MOTIUR
The experiment was conducted in the field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during rabi season from November, 2017 to April, 2018 to find out the efficacy of different traps and some nonchemical options against insect pest of ridge gourd. There were six treatments in the study comprising with T 0 = Control, T 1 =Poison bait trap, T 2 = Pheromone trap, T 3 = Banana pulp trap, T 4 = Neem oil, T 5 = Covering fruits with polythene. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. Among the treatments, covering fruits with polythene (T 5 ) showed the lowest per cent of fruit infestation per plot (5.64%) over control followed by neem oil (T 4 ) (12.90%) and T 5 showed the highest yield of total fruit weight per plot (7.48 kg) over control followed by T 4 (6.12 kg). In case of per cent increase of healthy fruit weight over control T 5 showed the highest result (939.24 %) followed by T 4 (685.12 %) at late fruiting stage of ridge gourd against fruit fly and red pumpkin beetle. Finally, the highest yield increase over control was achieved in covering with polythene, whereas the lowest increase showed in banana pulp trap over control. All traps and non-chemical options have great impact on ridge gourd yield and significant impact on fruit fly and red pumpkin beetle reduction. Key word: Ridge gourd, Fruit fly, Red pumpkin beetle, Poison bait, Banana pulp trap, Pheromone trap, Covering fruits with polythene.
EVALUATION OF SOME REDUCED-RISK INSECTICIDES FOR THE CONTROL OF LEGUME POD BORER MARUCA VITRATA FAB IN COUNTRY BEAN COUNTRY BEAN COUNTRY BEA
(DEPARTMENT OF ENTOMOLOGY, 2018) FERDOUS, JANNATUL
The experiment was demonstrated at the central farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh to appraise the performance of different management practices in controlling legume pod borer of country bean 1 : Application of MNPV at 7 days interval. T : Application of Success 2.5 SC vi 3 2 : Application of Proclaim 5 SG : Application of Cypermethrin @ 1ml/L of water at 7 days interval.T 5 4 : untreated. The experiment was laid out in Randomized Complete Block Design the lowest percent pod infestation was observed from T 5 3 -1 was observed from T 3 was measured in T 5 -1 was recorded from T was recorded from T 3 5 -1 3 -1 was found from T 3 5 was recorded from T 5 -1 , no. of flower inflorescence ,no. of pod inflorescence -1 , and pod length, i.e., the yield was increased with the increase of pods inflorescence -1 , pod length, no. of inflorescence plant -1 , no. of flower inflorescence . From this study, it may be terminated that T treatment
INTEGRATED MANAGEMENT OF CUCURBIT FRUIT FLY ON ASH GOURD
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) ZILANI, MD. GOLAM
A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the effective as well as hazards free management practice(s) of cucurbit fruit fly infesting ash gourd cultivated during Kharif I season from February 2018 to June 2018. There were six treatment including untreated control. The treatments were as follows T 1 (comprised of setting up of pheromone trap replaced at 1 month interval), T 2 (comprised of setting up of poison bait trap @ 2 g Sevin 85 WP mixed with 100 g mashed sweet gourd and 10 ml molasses replaced at 4 days interval), T 3 (comprised of setting up of banana pulp trap @1 ml malathion 57EC with 100gm mashed banana pulp @ 4days interval), T 4 (comprised of spraying of Neem oil @ 3 ml neem oil and 10 ml Trix mixed with 1 liter of water @ 7 days interval), T 5 (comprised of covering fruit with polythene bag at 1 poly bag per fruit @ 4 days interval); T 6 (comprised of untreated control). The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications.Covering fruit with polythene (T 5 ) contributed to produce the highest number of healthy fruit (14.50 fruit/plot); total weight of healthy fruit (103613gm/plot) and reduced the maximum fruit infestation over control (93.75%). The maximum single fruit weight over control (49.46%) was recorded in T 5. The higher temperature (34.5 C) negatively affected the capturing of adult fruit fly for poison bait trap because of drying up of bait materials, but not affected on the adult capturing capacity of pheromone trap. The highest benefit cost ratio (42.24) was also found for T 5 and the lowest BCR (19.23) for T 3 . Considering the social acceptance and environmental safely point of view, T 5 comprising of covering fruit with polythene bag was the most effective management practices in reducing the fruit fly infestation. Thereby increasing the yield of ash gourd. o
SPECIES DIVERSITY OF FLEA BEETLES OF CABBAGE AND ITS MANAGEMENT USING CHEMICAL INSECTICIDES AND BIO- PESTICIDES
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) FARHANA, FATIMA
A field experiment was conducted in the experimental farm of Sher-e-Bangla Agricultural University, Bangladesh during the period from October 2017 to March 2018 to evaluate the available species of flea beetles and their management practices in the cabbage. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Nine treatments, viz. T 1 (Sevin 85WP @ 2 g L of water at 7 days interval), T 2 (Decis 2.5 EC @ 1 ml L -1 of water at 7 days interval), (T (Voliam flexi @ 0.5 ml L -1 of water at 7 days interval), T 4 (Ripcord 10EC @ 1 ml L of water at 7 days interval), T 5 (Dursban 20EC @ 1 ml L -1 of water at 7 days interval), T 6 (Tobacco leaf extract @ 3 g L -1 of water at 7 days interval), T (Neem seed kernel extract @ 3 g L -1 of water at 7 days interval), T 8 7 (Bioneem plus 1 EC @ 1 ml L of water at 7 days interval) and T (Untreated Control) were used. Two species of flea beetle were found in the experimental field, stripped flea beetle (Phyllotreta striolata) and white-spotted flea beetle (Monolepta signata). It was observed that T 9 treatment performed best in managing flea beetles attacking cabbage based on the lowest percentage of leaf infestation (5.84%), lowest number of holes per plant (6.13), lowest percentage of head infestation by number (18.04) and highest percentage of infestation reduction over control on all parameters at vegetative stage of plant. Again, the lowest leaf infestation intensity (5.73%), lowest number of holes per infested head (14.00), lowest percentage of infestation of head by number (6.69), were achieved at harvesting stage from the same treatment (T ) whereas the highest values of all these parameters were achieved from untreated control treatment (T 4 treatment provided the best performance in yield where yield was increased (112.51 %) over control, giving maximum yield 75.76 ton ha -1 . 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 ) of cabbage. Moreover a strong negative relationship was observed between number of holes and weight of individual head and between percent head infestation and weight of individual head. -1 4 9 -1 -1 ). T 3 -1 4
SUCCESSION OF INSECT PESTS IN STORED GROUNDNUT AND THEIR CONTROL
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) MONDAL, SUDIPTA
The experiment was conducted in the central laboratory of Sher-e-Bangla Agricultural University (SAU), Dhaka – 1207, Bangladesh during the period from July 2017 to June 2018 to study the succession of insect pests in stored groundnut and their control. Six treatments such as T g/200 g seed, T g/200 g seed, T 3 1 = Sevin 85 SP @ 0.5 g/200g seed, T = Neem leaf powder @ 1.0 g/200 g seed, T 5 2 4 = Red chili powder @ 1.0 = Turmeric powder @ 1.0 = Coriander seed powder @ 1.0 g/200 g seed of groundnut and T Control (untreated) were used in this experiment. Treated and untreated containers were kept open in laboratory for natural infestation of insect pests. Two insect pests namely dried fruit beetle (Carpophilus hemipterous) and red flour beetle (Tribolium castaneum) were found to attack in stored groundnut seeds. Dried fruit beetle population was higher upto 315 days after storage. Sevin 85 SP provided the best protection against these pests in storage compared plant materials. Among the four plant materials, neem leaf powder gave better results for protection of groundnut seed in storage compared to other three plant materials. 6 =