MANAGEMENT OF SUCKING PEST COMPLEX OF POTATO, Solanum tuberosum L.
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Date
2019
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DEPARTMENT OF AGRICULTURAL ENTOMOLOGY B. A. COLLEGE OF AGRICULTURE ANAND AGRICULTURAL UNIVERSITY ANAND
Abstract
Aphid (Myzus persicae Sulzer) population showed two peaks, first at 3rd
week of January (3rd Standard Meteorological Week-SMW) and second at 1st week of
February (5th SMW) during rabi, 2017-18 with significantly positive association with
MaxT (r=0.61*) and BSS (r=0.70*) but it has significantly negative association with
WS (r=-0.61*). Population of jassids (Amrasca biguttula biguttula Ishida) attained
peaks at 3rd week of January during rabi, 2017-18. The thrips (Thrips palmi Karny)
also showed only one peak i.e. during 4th week of January (4th SMW) during rabi,
2017-18. Jassid and thrips showed non significant association with abiotic factors.
Whitefly (Bemisia tabaci Gennadius) population showed two peaks i.e. first at 3rd
week of January (3rd SMW) and 2nd at 1st week of February (5th SMW) during rabi,
2017-18 with significantly positive impact of BSS (r=0.61*). Larval population of
Helicoverpa armigera (Hübner) Hardwick showed two peaks, first during 3rd week of
January (3rd SMW) and second at 1st week of February (5th SMW) during rabi, 2017-
18 with significantly positive impact of BSS (r=0.63*). The higher activity of
universal predator, spiders and coccinellids (grubs+adults) was observed during 3rd
week of January (3rd SMW) and declined with crop maturity and disappeared from 8th
week of February (8th SMW).