An approach to manage sucking pest complex with plant products in cotton eco system

摘要

An experiment was carried out for two consecutive years of 2004-2005 and 2005-2006. In all, twenty different treatments comprising of NSE [Neem seed extract) 5 per cent, neem oil 1 per cent, Azadirachtin 1500 ppm @ 2 ml/1, CASE (Custard apple seed extract) 5 per cent were evaluated initially against sucking pests and continued further for evaluation against bollworms by scheduling the treatments viz., HaNPV 250 LE/ha, Bt 1000 g/ha and spinosad 45 SC @ 0.01 per cent (0.2 ml/1). The application of neemoil 1 per cent merged as the most effective treatment in recording the minimum population of aphids and whitefly, while NSE 5 per cent was observed to be most effective in recording the lowest population of leaf hoppers and thrips. The treatment NSE 5 per cent followed by spinosad 45 SC observed as the most effective treatment as it has obtained the highest seed cotton yield. In general, the botanicals were effective upto 3 days after treatment.