Management of Aphid ( Myzus persicae ) on Autumn Sown Potato Crop

摘要

For aphid management, mix cropping (PBM and PRM), four insecticides(DDVP, Anthio, Monitor and Laser) and yellow plastic sheet trap were used. The incidence of the pest was recorded on the leaves of the potato plants and yellow plastic sheets. The emergence of the pest on the crop occurred during October, which increased to the peak 43 aphids /leaf in the month of December. However on yellow plastic sheets, alate form of the aphids were recorded during the third week of September, which remain in abundance from the fourth week of November to the third week of December with the highest count 235 aphids /trap during second week of December. Among the treatments YPT, PBM and Monitor were found most effective against aphids during the entire growing season. Maximum reduction (72%), in YPT, (70%) in PBM and (52%) in the plot reserved for Monitor, in the aphid population was recorded. In the remaining treatments 40-50% of the population was reduced during the intact growing season of the potato crop when compared with control.