Eco-friendly management of wheat aphids at Pantnagar
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Date
2015-06
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The studies on eco-friendly management of wheat aphids at Pantnagar were carried out during crop season 2013-14 and 2014-15. The seasonal incidence of wheat aphids i.e. Microsiphum miscanthi and Rhopalosiphum padi was started in the month of January 2015 (4th Std week) and peak population of winged and wingless aphid reached in (8th Std week) February 2015 with peak population of natural enemies coccinella and syrphids during the same period. The studies on installation of yellow sticky traps for monitoring of alate aphids was found effective to trap alate aphids during their peak period of incidence. The studies on the efficacy of biopesticides, cow urine and cow urine based formulations clearly showed the effect of Metarhizium anisopliae, Beaveria bassiana, Azadirahctin 1500 ppm, neem seed kernel extract @ 5%, neem seed cow urine extract @ 2%, neem seed cow urine extract @ 2% and cow urine@ 20% against aphids with no adverse effect on population of natural enemies with significant increase in grain yield. On the other hand, i.e. Imidacloprid 17.8 SL, Clothianidin 50 WDG, Acetamiprid 20SP and Thiamethoxam 25 WG were found deleterious to population of natural enemies. Among the wheat lines screened under nursery conditions for aphid population, GW 432, UP 2843, UP 2872, HW 5224, WH 1098, WH 1129, NIDW 699 were found resistant with 3.40-5.93 aphids/shoot/plant, HPW 381, HS 578, KRL 348, HD 3095, RAJ 4250, DDK 1044, DDK 1045, HW 4042, HW 5235, UP 2847,UP 2871, HD 3121, WH 1137, were found moderately resistant with 6.13-10.80 aphids/plant and comparatively more aphid population was observed in HI 8724 (25.46 aphids/’shoot/plant) and Sonalika (21.50 aphids/shoot/plant) which were found highly susceptible for wheat aphids. The above studies clearly revealed that the natural enemies play major role in management of aphid population, yellow sticky traps were also found efficient for monitoring of alate aphid population and use of eco- friendly measures like biopesticides, cow urine in addition to resistant wheat varieties could be suitable alternatives to conventional chemicals which are safe, readily available, almost free of cost to farmers and have long term effect and easily be incorporated in an eco-friendly manner for management of wheat aphids in IPM programme.
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