The recent emergence of pink bollworm (PBW), Pectinophora gossypiella (Saunders) has posed serious ecological and economic implications for cotton production in India since 2017. The project ...“Insecticide Resistance Management (IRM): Dissemination of pink bollworm management strategies in Bt-cotton” was implemented consecutively for four years from 2018 -19, 2019–20, 2020-21 and 2021-22 in 21 districts across three cotton growing zones of the country. In each year, field demonstrations were conducted on 1050 acres of cotton area and mass awareness was created through outreach activities. With concerted and focused efforts, the PBW infestations could be brought down by 42.75% in 2018–19, 43.49% in 2019–20, 35.55% in 2020-21 and 33.77% in 2021-22 in the demonstration plots over the farmer practices. An increased benefit: cost ratios of 2.16:1, 2:1, 1.89:1 and 2.24:1 were realized during 2018–19, 2019–20, 2020-21 and 2021–22, respectively. Similarly, the average number of sprays for the control of cotton pests during the season was reduced to 5.02, 4.94, 5.19 and 5.18 in integrated pest management (IPM) fields as compared to 6.98, 7.66, 8.07 and 8.20 in non-integrated pest management (NIPM) fields in the corresponding years. Reduction in pesticide usage in IPM vs NIPM fields was 46.39% in terms of cost, and 38.96% in terms of volume during 2019-20 while concurrent percent reduction in pesticide usage was 41.03 & 39.33 during 2020-21 and 40.70 & 39.38 in 2021–22. Comparatively more seed cotton was harvested from IPM than NIPM fields i.e. 2190 vs 1820 kg/ha in 2018–19, 2049 vs 1715 kg/ha in 2019–20, 1881 vs 1585 kg/ha in 2020-21 and 1901 vs 1607 kg/ha in 2021–22. Significant success in reducing PBW infestation, pesticide usage and corresponding improvement in yield, economic benefits and environmental quality in terms of reduced EIQFUR has been achieved through IPM demonstrations. This area-wide success was achieved through collective efforts and active involvement of all concerned stakeholders.
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•Pink bollworm has emerged as serious threat to Indian cotton production.•Areawide IPM strategies disseminated & mass awareness created through outreach.•Significant reduction in pest infestation and pesticide usage was achieved.•Realization of economic benefits to cotton growers was demonstrated.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPUK, ZAGLJ, ZRSKP
The field trial on response of different species of honeybees to the insecticides in safflower was conducted at research farm of Department of Agricultural Entomology, Vasantrao Naik Marathwada ...Krishi Vidyapeeth, Parbhani during 2020-21 and 2021-22.The studies revealed that the maximum number of honeybees population of Melipona irridipenis (7.28 bees /m2 /min.), Apis dorsata (5.70 bees /m2 /min.), Apis cerana indica (4.95 bees /m2 /min.), Apis florea (4.26 bees /m2 /min.) and Apis mellifera (3.52 bees /m2 /min.) was recorded in an untreated control plot followed by the treatment seed treatment with thiamethoxam 30 FS @ 10 ml/kg seed and seed treatment with imidacloprid 48 FS @ 9 ml/kg seed in which 5.63, 5.48, 4.78, 4.08, 3.34 and 5.67, 4.98, 4.29, 3.57, 3.16 M. irridipenis, A. dorsata, A. cerana indica, A. florea and A. mellifera bees /m2/min. were recorded, respectively. The next better treatments were soil drenching with clothianidin 50 WDG, seed treatment with thiamethoxam 30 FS and one foliar spray of cyantraniliprole 10.26 OD, seed treatment with thiamethoxam 30 FS and one foliar spray of spinetoram11.70 SC, seed treatment with imidacloprid 48 FS and one foliar spray of cyantraniliprole 10.26 OD, seed treatment with imidacloprid 48 FS and one foliar spray of spinetoram 11.70 SC, soil drenching with clothianidin 50 WDG and one foliar spray of cyantraniliprole 10.26 OD, soil drenching with clothianidin 50 WDG and one foliar spray of spinetoram11.70 SC, two foliar sprays of cyantraniliprole 10.26 OD and two foliar sprays of spinetoram11.70 SC in which honey bees population of M. irridipenis, A. dorsata, A. cerana indica, A. florea and A. mellifera bees /m2/min. were recorded in the range of 3.63 to 5.30, 2.94 to 4.51, 2.24 to 3.87, 1.58 to 3.08 and 1.00 to 2.74 bees /m2/min., respectively.
Aim: To study the seasonal occurrence of cucurbit melon fly and correlation study with weather parameters to know the impact of abiotic environmental factors on the activity of melon fruit fly ...concerning infesting the fruits of bitter gourd in crop ecosystem.
Place and Duration of Study: College of Agriculture, VNMKV Parbhani, Maharashtra. Studies during two seasons Rainy and Summer 2021 and 2022 respectively.
Methodology: The experimental plot was kept unsprayed throughout the crop season. The observation was recorded as soon as the incidence was noticed from five randomly selected plants at weekly intervals. The observations of fruit flies were recorded from the day of fruit formation to the last picking of the fruit. The damaged and healthy fruits were recorded at eachpicking to knowing the percentage fruit infestation by fruit flies.
Results: Fruit fly was the major pest of bitter gourd in fruit damage. The fruit damage record range was 15.65 to 59.33 per cent in the rainy season whereas, 28.99 to 61.14 per cent in the summer season. The per cent fruit infestation shows a significant and positive correlation with no. of maggots per fruit (r = 0.857 and 0.905) during both seasons respectively. Weather parameters like morning relative humidity (MRH) and rainfall the during rainy season show significant and positive correlation (r = 0.87 and r = 0.71 respectively) whereas, during the summer season significant and positive correlation (r = 0.77) with MRH and significant and negatively correlated with (r = - 0.66) minimum temperature. The record of larval pupal parasitoid Psyttalia fletcheri (Silvestri) and it was discovered that 16% of the population was parasitized during the experimental period
Conclusion: The infestation may vary from season to season, region to region and concerning variety also. Here the infestation range was higher during the summer season, which may be because of the coincidence with the fruit season of mango in that area.
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