Year 2022
Browse
20 results
Search Results
Item EVALUATION OF DIFFERENT ECO-FRIENDLY MANAGEMENT PRACTICES AGAINST FRUIT FLY OF BOTTLE GOURD(DEPARTMENT OF ENTOMOLOGY, 2022) AKTER, SHARMINThe study was conducted in the experimental field of Sher-e-Bangla Agricultural University , Dhaka during the period from October, 2021 to April, 2022 to find out the evaluation of different eco-friendly management practices against fruit fly of bottle gourd . The experiment was laid out in a Randomized Complete Block Design replicated with three replications. In this study, treatments T 1 ii = Using pheromone trap; T 2 = Using bait trap with banana mashed at 5 days interval; T 3 = Using bait trap with sweet gourd mashed at 5 days interval; T 4 = Using pheromone trap + Using bait trap with banana mashed at 5 days interval; T 5 = Using pheromone trap + Using bait trap with sweet gourd mashed at 5 days interval; and T 6 = Untreated control where nothing were applied. T 5 showed the best performance in terms of number of fruit fly (4.09 adult) captured, percent reduction of fruit infestation by number over control at early (84.50%), mid (77.68%) and late (76.57%) fruiting stages; percent reduction of fruit infestation by weight over control at early (75.43%), mid (72.05%) and late (64.17%) fruiting stages; fruit length (54.87cm), fruit girth (24.37cm), single fruit weight (2.59kg) and yield (71.37t/ha) . The overall study revealed that, the most significant performance was achieved from T 5 treatment (Using pheromone trap + Using bait trap with sweet gourd mashed at 5 days interval) which contributed to highest control of cucurbit fruit fly as well as the maximum increase of healthy fruit length, girth and the yield.Item EFFICACY OF BIO-RATIONAL INSECTICIDES IN CONTROLLING THRIPS IN SUMMER COUNTRY BEAN(DEPARTMENT OF ENTOMOLOGY, 2022) BEGUM, MOST. SUKHYThe experiment was conducted at the central farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh to study the efficacy of biorational insecticides in controlling thrips country bean in summer. The experiment consists of the following management practices: T 1 =Spraying Neem oil @3 ml/L of water at 7 days interval, T 2 =Spraying Neem leaf extract @200mg/L of water at 7 days interval, T 3 = Mehgoni leaf extract@200mg/L of water at 7 days interval, T 4 =Tobacco leaf powder@30mg/L of water at 7 days interval, T 5 = Spraying Spinosad @0.4ml/L of water at 7 days interval, T 6 =Spraying [email protected]/L of water at 7 days interval and T 7 = Untreated control. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Data on number of thrips as insect pest, plant, leaf, inflorescence and pod infestation, different yield contributing characters and yield of summer country bean were observed. Among the seven (7) treatments the lowest number of thrips (2.50 plant ii -1 ) was observed in T 5 (Spraying Spinosad @0.4ml/L of water at 7 days interval), while highest number of thrips (16.67 plant -1 ) was observed in T 7 (Untreated control). The highest percentage of thrips reduction over control (85.50%) was observed in T 5 (Spraying Spinosad @0.4ml/L of water at 7 days interval) treatment. The present study revealed that the lowest number of thrips as insect pest and increased plant, leaf, inflorescence and pod infestation, different yield contributing characters and yield of country bean might be obtained by using the treatment T 5 (Spraying Spinosad @0.4ml/L of water at 7 days interval) besides T 6 (Spraying [email protected]/L of water at 7 days interval) performed as second best treatment whereas, T 7 (Control) and T 3 (Mehgoni leaf extract@200mg/L of water at 7 days interval) may protect the country bean at lowest rate in summer. The highest (3.08) benefit cost ratio was obtained due to application of T 5 (Spraying Spinosad @ 0.4ml/L of water at 7 days interval) while the lowest (2.26) in T 7 (control).Item ECO-FRIENDLY MANAGEMENT OF FRUIT FLY INFESTING CUCUMBER(DEPARTMENT OF ENTOMOLOGY, 2022) MOMOTAJ, AFRINAAn experiment was conducted in the research field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, from October 2021 to January 2022 to evaluate eco-friendly management of fruit fly infesting cucumber. There were several insect pests in the cucumber field that could bring about a significant impact on the yield and quality of the cucumber itself and among them, fruit fly is the most prevalent and harmful. The experiment was laid out in Randomized Complete Block Design and replicated 3 times. For this study, 8 treatments were used and these were T 1 : using Pheromone trap @1 trap/plot/2 weeks; T 2 : using Poison bait trap @ 1 trap/plot; T 3 : using Pheromone trap @1 trap/plot/2 weeks + Using Poison bait trap @ 1 trap/plot; T 4 : spraying Neem oil @ 3ml/L of water at 7 days interval; T 5 : spraying garlic extract @ 3ml/L of water at 7 days interval; T 6 : spraying Neem seed kenrnel extract @ 3g/L of water at 7 days interval; T 7 : using Pheromone trap @1 trap/plot/2 weeks + Spraying Neem oil @ 3ml/L of water at 7 days interval; T 8 : untreated control. Local variety ‘Baromashi’ was used as the experimental material. The lowest fruit infestation by number at early, mid & late fruiting stage, fruit infestation by weight at early, mid & late fruiting stage were recorded (12.50%, 14.29%, 16.67%, 11.25%, 5.35%, 17.96%, respectively) in T 7 treatment. Again, the highest edible portion of infested fruit at early, mid & late fruiting stage, single fruit weight, length of healthy fruit, length of infested fruit, and yield were recorded (53.37%, 58.98%, 62.89%, 136.56g, 19.89cm, 15.31cm, and 15.56 t/ha, respectively) in T 7 treatment. From the study it was revealed that, pheromone trap along with spraying neem oil substantially reduced maximum fruit fly infestation in cucumber at field condition.Item MORPHOMETRIC CHARACTERISTICS OF BLACK SOLDIER FLY AND THEIR GROWTH RATE ON DIFFERENT WASTE MATERIALS(DEPARTMENT OF ENTOMOLOGY, 2022) RUMPA, SUNANDA SARKARA study was conducted in SAU Insectarium at Sher-e-Bangla Agricultural University (SAU), Dhaka, Bangladesh during the period of July to December, 2021 to study the morphometry and growth rate of black soldier fly in different waste materials.Two different experiments were conducted using CRD method. Four different type of waste materials with different level of nutrient content available for black soldier fly larvae were selected for the study namely WM 0 ii : Control (Rice straw), WM 1 : Kitchen waste, WM 2 : Restaurant waste, WM 3 : Fish garbage and WM 4 : Leftover fruits, 4 replications were done to find out their efficacy on black soldier fly culture media.The life stages of black soldier fly was observed through the egg hatching (1-4 days), larval growth through six instars with five exuviate stages which took up to 13 to 18 days to complete. The last exuviate stage marks the transition from larva to prepupa, with ceasing of eating for further pupation (color: black). Male and female adult stage duration varied for 2 to 3 days although average adult stage duration was for 5 to 8 days for most of the black soldier flies. The mean larval period was observed as long as 15.50 days (±2.50). The mean egg to adult period for male black soldier fly was observed 45.10 days (±4.25), whereas for female black soldier fly the duration was recorded as 48.25 days (±4.13). Among the different waste materials Kitchen waste, Restaurant waste, Fish garbage and Leftover fruits considering black soldier fly culture, treatment WM 4 : Leftover fruits showed better performance in completing larval period, egg to adult duration and fecundity (10.00, 46.67 and 528) and took minimum days for hatching (3.05) demonstrating rapid growth and development as well as best fecundity. Treatment WM 4 : Leftover fruits showed better performance in egg to larval period and egg to adult growth rate (49.05% and 60.13%) resulting the most suitable culture media for black soldier fly commercial culture.Item INCIDENCE AND ECOFRIENDLY MANAGEMENT OF CAPSICUM FRUIT BORER, Helicoverpa armigera (Hubner)(DEPARTMENT OF ENTOMOLOGY, 2022) NAHAR, SHAMSUNAn experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2020 to March 2021 to study the incidence and ecofriendly management of Capsicum fruit borer. The experiment consists of control measures and plant extract. The experiment was laid out in Randomized Complete Block Design replicated with four times. For this study having six treatment, viz: Treatment T 1 : Field Sanitation + Netting; T : Field sanitation + rice straw mulch; T 3: 2 Field sanitation + Spinosad (Tracer) @ 0.5ml/L of water at the 7 days intervals; T 4: Black polythene + leaf extract of neem at the 7 days intervals; T : Field sanitation + Neem oil @ 2.0 ml/L of water with detergent at the 7 days intervals; T : control were included in this study. The results showed that the presence of capsicum fruit borers (Helicoverpa armigera Hubner) at various fruiting stages destroys the capsicum fruit contents and is one of the major constraints to increasing bell pepper yields. Thus, for the management of capsicum fruit borer, it was discovered that treatment T (Field sanitation + Spinosad at 7-day intervals) was the most effective treatment for reducing insect pest infestation at all growing stages. While the lowest performance was observed in T 3 6 (Control) was followed by T (Field Sanitation + Netting) treatment. The highest total yield hectare -1 was found from T 1 (23.43 ton), while the lowest yield hectare -1 was found from T 6 2 (19.54 ton) treatment. The yield of capsicum was highly significant (p=0.05), very strong and negatively correlated with infested fruit yield (t/ha) i.e., the total yield of capsicum increased with the infested fruit yield (t/ha) decreased. From the study, it may be concluded that treatment T which comprised with the Field sanitation + Spinosad at the 7 days intervals used as a best treatment against Capsicum fruit borer which was followed by spraying of T 5 3 treatment.Item FIELD EFFICACY OF SOME BIO-RATIONAL BASED MANAGEMENT APPROACHES AGAINST FRUIT FLY ATTACKING SWEET GOURD(DEPARTMENT OF ENTOMOLOGY, 2022) AKTAR, SUMAA study on field efficacy of some bio-rational based management approaches against fruit fly attacking sweet gourd was conducted at the research field of the Sher-e-Bangla Agricultural University, Dhaka, during the period from November, 2021 to March, 2022. Some biorational management practices viz., T 1 : mass trapping of fruit flies with cuelure based sex pheromone trap, T 2 ii : azadirachtin (Fytomax 3EC), T 3 : mashed sweet gourd poison bait trap, T 4 : spinosad (Success 2.5 SC) were evaluated along with T 5 : farmers’ practice (Ripcord 10 EC) and T 6 : untreated control. Data on different parameters such as fruit infestation by number and weight, yield and others were recorded to fulfil the objectives. At flowering stage, effect of different biorationals on infestation of female flowers by fruit fly varied significantly. Considering of healthy female flowers production per plot, the highest number of healthy female flowers/plot (14.05) were recorded from T 2 treatment which was significantly different from all other treatments. Field efficiency of biorational management of fruit fly on sweet gourd was significantly different among the treatments. The highest healthy fruit yield (30.85 t/ha) was recorded from treatments T 3 which was statistically different from other treatments. The lowest healthy fruit yield (12.67t/ha) was recorded from treatments T 6 which was statistically different from all other treatments. The highest infested fruit yield (6.15 t/ha) was recorded from treatments T 6 and the lowest infested fruit yield (3.15 t/ha) obtained from the treatments T 3 which was significantly different from all other treatments. The highest total fruit yield (34.00 t/ha) was obtained from T 3 treatment and lowest total fruit yield (18.82 t/ha) from T 6 treatment. Considering all yield attributing parameters, treatment T 3 comprising mashed sweet gourd poison bait trap gave the most satisfactory result.Item EFFECT OF HOST MATERIALS ON BIOLOGY OF CIGARETTE BEETLE, Lasioderma serricorne (F.)(DEPARTMENT OF ENTOMOLOGY, 2022) AKTER, TASMERINThe cigarette beetle, Lasioderma serricorne (F.) is a serious insect pest of many stored products, spices and dried fruits. The experiment was conducted to know the effect of host materials on the biology of cigarette beetle in laboratory of the Department of Entomology, Sher-e-Bangla Agricultural University (SAU) during July to December, 2021. This research was laid out in a Completely Randomized Design (CRD) consisting six host materials such as coriander, maize, rice, lentil, chickpea and wheat in free choice and no choice test. The mean incubation, larval and pupal period, adult longevity, and total life cycle ranged from 6.0-8.0, 23.0- 26.0, 5.0-8.0, 8.010.0 and 43.5- 51.0 days respectively on different host materials in no choice test. The average survivability of egg, larva and pupa varied from 61.38-78.90, 75.67- 87.87 and 74.65-85.20%, respectively in no choice test and 66.87- 79.75, 71.73- 87.87 and 67.31- 85.20%, respectively in free choice test. The mean number of adult developed on six host material was 10.25- 80.00 in no choice test and 2.25- 107.30 in free choice test. The order of six host materials on the effect of duration and survivability of cigarette beetle is lentil > wheat > chickpea > maize > rice > coriander. The weight of pupa and larva was varied from 15.18-22.0 g and 6.03-11.98 g, respectively on six host grains in free choice test. Average number of adult developed from six host materials ranged from 10.25-80.00 and 2.25- 107.30, respectively in no choice and free choice test. Lentil was the most preferable host material of cigarette beetle and coriander was the least one in terms of egg hatching, larva and pupa survivability.Item EFFECT OF STICKY TRAPS IN MONITORING INSECTS AND THEIR PERFORMANCE ON BITTER GOURD YIELD(DEPARTMENT OF ENTOMOLOGY, 2022) ZOHORA, FATEMA - TUZ -A field experiment was carried out at Sher-e-Bangla Agricultural University in Dhaka from March to July 2022 with sticky traps to investigate the abundance of insects and their effect on bitter gourd. The experiment was laid out in randomized complete block design (RCBD) with five replications and consisted of five treatments i.e. T : Yellow sticky trap, T 2 : Blue sticky trap, T ii 3 : White sticky trap, T 4 : Red sticky trap, T : and control. Results showed that nine insect pest species belonging to nine families and five orders infested the various growth stages of the bitter gourd crop. Of these, five species namely aphid (Aphis craccivora), thrips (Thrips palmi), red pumpkin beetle (Aulacophora foveicollis), whitefly (Bemisia tabaci Genn.) and melon fruit fly (Bactrocera cucurbitae) respectively caused 27.30%, 15.41%, 5.92%, 21.84% and 17.88% plant infestation. A total of nine species of insect were found as pollinators belonging to seven families of four orders. Among the pollinators, bees (Apis cerana, A. florea and A. dorsata) were most significantly highly abundant (52.43 %) compared to other species (47.57%). Color sticky traps with high pollinator catches cause a decrease in pollinator population densities in the experimental field. Of the various color sticky traps tested, yellow color sticky traps attracted a significantly higher number of pollinators with a mean population of 15.67. Among the treatments the maximum mean catchments of aphids (258.66 per trap), whiteflies (32.84 per trap), thrips (103.04 per trap), melon fruit fly (12.11 per trap) and red pumpkin beetle (6.22 per trap) were recorded in yellow sticky trap (T ). The use of different sticky traps on bitter gourd significantly influenced yield contributing characters and yield. Highest number of fruits per plant (18.20), single fruit weight per plant (106.00 g), minimum fruit infestation by number (10.99 %) and weight basis (10.98 %) and maximum fruit yield (18.38 t ha 1 ) were found with the treatment yellow color sticky traps. However, considering yield and attraction of insect, T (Blue sticky trap) also found effective for management of insect pest on bitter gourd.Item INSECT PEST INFESTATION STATUS ON LOCAL POTATO VARIETY (LAL PAKRI) AND THEIR BIORATIONAL MANAGEMENT(DEPARTMENT OF ENTOMOLOGY, 2022) PAVEL, MD. NAZIUR RAHMANPotato, Solanum tuberosum L. is the king of vegetables in Bangladesh. Potato is a prominent crop in consideration of production and its internal demand in Bangladesh. An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka,Bangladesh during the period from October, 2020 to September,2021 study the effect of different insecticides in controlling potato insects. The experiment was laid out in Randomized Complete Block Design replicated with three times. For this study, seven treatment combinations like T 1 = Spraying Neem oil @5ml/L of water; T 2 = Spraying Neem seed kernel extract @5g/L of water; T 3 = Spraying Spinosad @0.5ml/L of water; T 4 = Buprofezin 40wp @0.5g/L; T 5 = Emamectin Benzoate 1ml/L; T 6 = Matrin @1ml/L and T 7 = Untreated control. Neem oil (T 1 ) showed the best performance in terms of insect incidence of aphid, cutworm and field cricket, potato tuber infestation by number and weight and yield (2.54 aphid/5 tagged plants, 0.85 cutworm per plot, 1.61 field cricket per plot, 18.88%, 5.79% and 48.76 t/ha, respectively). In case of Jassid infestation Emamectin Benzoate (T 5 ) showed the best performance 1.82 Jassid/5 tagged plants. The natural enemy ladybird beetle was found high in T 1 applied field (4.18 ladybird beetle/5 tagged plants). So, from this study it can be revealed that, neem oil can play an important role in reducing the incidence of insect pests of potato as well as increase the incidence of natural enemies and yield of potato in the field condition.Item EFFICACY OF THREE INSECTICIDES AGAINST MANGO MEALYBUGS MEALYBUGS ( Drosicha mangiferae GREEN)(DEPARTMENT OF ENTOMOLOGY, 2022) YESMIN, FARZANAThe experiment was conducted at Entomology laboratory and field of Sher-e-Bangla Agricultural University campus, Dhaka during the period from January 2021 to May, 2021 to study the efficacy of insecticides against mango mealybug. Three insecticides namely Thiodicarb (Larvin 75WP), Chlorpyriphos (Dursban 20EC), Emamectin benzoate (Emamectin benzoate 1.9EC) with different doses were tested on different stages of mango mealybug. In field the experiment was laid out in randomized complete block design (RCBD) and in laboratory it was set in completely randomized design (CRD) with four replications. The highest mortality of 1 st instar nymph of mango mealybug (88.25% in laboratory and 83.33% in field) was found in T (Chlorpyriphos 3.0 ml/L) treated insects followed by (88.25% in laboratory and 64.67% in field) in T (Chlorpyriphos 2.5 ml/L) treated insects after 72 hrs of spray. In 2 nd 5 instar nymph of mango mealybug highest mortality (76.25% in laboratory and 42.33% in field) was also found in T (Chlorpyriphos 3.0 ml/L) after 72 hrs of spray. At 3 rd 6 instar nymph highest (16.25%) mortality was found in T (Chlorpyriphos 3.0 ml/L) at laboratory but in field, 15.33% mortality was found in T 6 which was statistically similar with T (Thiodicarb 3.0 gm/L) and the mortality was 15.67%. In case of adult female mango mealybug after 72 hrs of spray T 3 (Chlorpyriphos 3 ml/L) showed the highest (9.00%) mortality in laboratory. Lowest mortality was found in Emamectin benzoate at all doses and all life stages of mango mealybug. First instar nymph was more vulnerable to insecticides. The order of susceptibility of the different stages of mealybug was 1 st instar nymph> 2 nd 6 6 instar nymph> 3 instar nymph> adult against insecticides.