EVALUATION OF DIFFERENT VARIETIES OF MUNGBEAN AGAINST INSECT PEST COMPLEX

Abstract

A studies were conducted with seven mungbcan varieties viz. BARE Mug-2, BARI Mug-3, BARI Mug-4, BARI Mug-5, BARI Mug-6, BINA Mug-2 and BINA Mug5 on the incidence of insect pests during the Kharif-1 season (09 April, 2006 to 30 June, 2006). Whitefly (/Jwntvia 'a/w.jci (ienn.), jassid (Empocisca kern), bean stemfly (Opluomyia pha.veoli Tryon), semilooper (Dniclzrysia orociza/cea), pod borer (/:uchrywps c)?e/,t F.) and niungbean yellow mosaic virus (MYMV) were identified as pests in all tested varieties. Positive colTelation was observed between whitefly (Bemisia icthaci Genn.) population (adult and nymph) and environmental factors such as temperatwe and relative humidity. A linear relationship (R2 = o.7673 ) was observed between MYM\' and adult whitefly population, thus znungbean yellow mosaic virus (MYMV) infection was positively correlated with the whitcily population (adult and nymph) while, BARI Mug-6 and BARI Mug-5 was the least preferred varieties to whitefly and thus they showed the lowest MYMV infection, BARI Mug-6 and BARI Mug-5 was also the tolerance tojassid and stemfly. While BINA Mug-5, BARI Mug-6 and I3ARI Mug-4 was the most tolerance to pod borer and semilooper, therefore in general. BARI Mug-4, BINA Mug-5 and BARI Mug-6 were least susceptible to pest complex and 13ARI Mug-6 and BARI Mug-5 appeared to be the best varieties in terms of resistance and yield.