We compared the efficacy of methyl parathion, Guthion, Dimilin and BWACT baitsticks in large-plot studies in Mississippi. Guthion and methyl had similar efficacy on boll weevils when used at pinhead square and later in the season. Four applications of Dimilin gave weevil control comparable with two applications of methyl when used at pinhead square. Although baitsticks were effective at attracting weevils, they did not delay the need for mid-season control of weevils when they were used at pinhead square in conjunction with methyl application. Based on efficacy and economic considerations, methyl parathion remains a very viable method of controlling boll weevils.