* B.S.A. College of Mathura, U.P.
** J.K. Krishi Vishwa Vidhyalaya, Jabalpur-482 004, India.
Department of Entomology, College of Agriculture, J.N.K.V.V. Ganjbasoda Distt. Vidisha-464 22.
Field trial were conducted in two crop seasons with Amerrican cotton variety JK-4 to study the comparative bioefficacy of six insecticides, against whitefly, Bemisia tabaci, using foliar application. Insecticide of thio-ureas class, dafenthiuron 50 SC @ 400 g ai/ha was found most effective and recorded maximum reduction in population of whitefly, with maximum increase in yield over control, net profit and was relatively safer for potent predators. However, triazophos 40 EC 500 I ai/ha and acetamiprid 20 SP @ 20 g ai/ha were the next effective insecticides. The results suggested that difenthiuron. triazophos and acetamiprid were good substitutes from conventional insecticides in vogue. which could be used in formulating a successful management for B. tabaci in cotton.
Bemisia tabaci, Gossypium hirsutum, Insecticides
