Vial bioassays were conducted to estimate the susceptibility of boll weevils (Anthonomus grandis grandis) to malathion and of bollworm to cypermethrin in Texas. Weevils tested in the year 2000 were from Burleson, Lubbock, Hidalgo and Nueces Counties. The laboratory strain of boll weevils obtained from the USDA-ARS Mission, TX was used as an internal control. Weevils from Nueces County (South East Texas) and Hidalgo County (Lower Rio Grande Valley) were less susceptible than those from Lubbock (north Texas), that were highly susceptible to malathion. The increase in tolerance to malathion in boll weevils detected by this method indicates that monitoring for resistance should continue, with special attention to young weevils emerging from squares in areas under the eradication program. The current status of susceptibility of bollworm (Helicoverpa zea) to cypermethrin is reported.