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Singh, Beerendra
- Efficacy of Egg Parasitoid in Management of Brinjal Shoot and Fruit Borer, Leucinodes orbonalis Guenée
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Authors
Affiliations
1 Department of Entomology, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur - 313001, Rajasthan, IN
1 Department of Entomology, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur - 313001, Rajasthan, IN
Source
Journal of Biological Control, Vol 33, No 4 (2019), Pagination: 343-347Abstract
The relative efficacy of Trichogramma chilonis (Ishii) was evaluated for management of the brinjal shoot and fruit borer in the field condition at the Horticulture Farm of Rajasthan College of Agriculture, MPUAT, Udaipur from July 2016 to February 2017. The result showed that when three dosages of egg parasitoid, T. chilonis applied with 6 and 8 times releases @ 50000, 100,000 and 150,000 parasitized eggs at 10 days interval starting from 15 days after transplanting, releases of 150,000 for 6 and 8 times was found to be most effective with mean shoot damage of 11.96 and 12.66 per cent, respectively, while, the least effective rate was when parasitoid was released @ 50000/ha (T2 and T1) with mean shoot damage of 17.78 and 18.12 per cent, respectively, against fruit borer damage. Six and eight times release of T. chilonis @ 150,000 was most effective with mean fruit damage of 11.67 and 9.80 per cent on number basis, and 11.59 and 9.90 per cent per cent fruit damage on weight basis. The results revealed that the maximum parasitism was recorded for treatments of 8 and 6 times @ 150,000 /ha (47.61 per cent to 47.05 per cent).Keywords
Barrier Crop, Brinjal, Egg Parasitoid, Leucinodes orbonalis, Sorghum, Trichogramma chilonisFull Text
References
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- Natarajan N. 2005. Biological control of eggplant shoot and fruit borer: current status and future prospects. National symposium on eggplant Shoot and fruit borer, IIVR, Varanasi.
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- Niranjana RF, Devi M, Shanika W, Philip Sridhar R. 2015. Potential use of egg parasitoids, trichogramma chilonis ishiiand trichogramma pretiosum riley against brinjal shoot and fruit borer, Leucinodes orbonalis Guenee. Trop Agri Res. 27: 88-94. https://doi.org/10.4038/tar.v27i1.8156
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- Population Dynamics of Spodoptera exigua (F.) and S. litura (F.) in Soybean
Abstract Views :107 |
PDF Views:64
Authors
Affiliations
1 Department of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur 313001, Rajasthan, IN
1 Department of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur 313001, Rajasthan, IN
Source
Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 819-823Abstract
This study on the population dynamics of Spodoptera exigua (F.) and S. litura (F.) in soybean was done with observations made from 10 days after germination of the crop for two years. The results revealed that these pests are more abundant from July to August- Spodoptera litura (F.) occurred from the first week of July with occurrence of adults increasing with the growing season, and ending with the maturity of the crop. Amongst the current, 1st lag and 2nd lag week weather parameters, the occurrence of adults of S. exigua revealed a significant positive correlation with minimum temperature (r=0.716), evening relative humidity- RH (r=0.535), sunshine (0.621) and wind speed (0.661). Maximum temperature and wind speed exhibited a significant negative correlation with incidence of males of S. litura whereas, morning and evening RH were positively correlated with the incidence at 1-lag and 2-lag weeks. The incidence of larvae of S. litura was significantly influenced by morning RH (r=0.783) in the 2-lag week. The regression equation indicated that an increase in 1 mm rainfall decreased the male moth catches of S. exigua; while, incidence of larva was significantly affected with increase in 1% of morning RH; and incidence of S. litura larvae was related with maximum temperature of 1oC.Keywords
Soybean, Spodoptera litura, S. exigua, forecasting, weather factors, population dynamics, pheromone trap, male catches, correlation, regressionFull Text
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