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Differences in Heliothis Virescens Resistance Development after Laboratory Selection with Profenofos, Thiodicarb and Cypermethrin

G.H. Ernst, F. Zambrano, G. Pinzon, Y. Mosos


A selection experiment was conducted in Colombia using a field population of the tobacco budworm Heliothis virescens. Profenofos, thiodicarb, cypermethrin and a-cypermethrin were applied to third instar larvae for 13 generations. Bioassays were conducted to measure the development of resistance. The resistance factors after a 13 generation pressure were respectively 2 for profenofos, 21 for thiodicarb, 748 for cypermethrin and over 2000 for a-cypermethrin.

Reprinted from Proceedings of the 1996 Beltwide Cotton Conferences pp. 1069 - 1071
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998