Vial bioassays were conducted to estimate the susceptibility of boll weevils (Anthonomus grandis grandis) to malathion in Texas. Weevils tested in the year 2001 were from Burleson and Lubbock Counties. Susceptibility data previously obtained from the laboratory strain of boll weevils (USDA-ARS Mission, TX) were used as reference. Weevils from both counties were susceptible to malathion. This is significant because the boll weevil eradication program began in 2001 for Burleson County.