Sampling methodology for assessing field population of mirid, Campylomma livida infesting cotton

摘要

Rapid increase in the cultivation of Bt-cotton in India on about 95% of total area under cotton cultivation has dramatically reduced insecticide usage against American bollworm {Helicoverpa armigera Hub.), spotted bollworm (Earias insulana Boisd. andE. vitella Fab.) and pink bollworm (Pectinophora gossypiella Saunders) from 46 per cent in 2001 to less than 26 per cent after 2006 and 21 per cent during 2009 and 2011 (CICR, 2011). The insecticides applied for the control of bollworms were also able tocontrol coincident sucking pests like leafhopper (Amrasca biguttula biguttula Ishida), aphid (Aphis gossypii Glover), mirid (Campylomma livida Reuter, Creontiades biseratense Distant), thrips (Thrips tabaci Linde.) and whitefly (Bemisia tabaci Genn.). Reduced insecticide use in cotton allows sucking pest populations to persist season-long and become troublesome.