Abstract
Preplant soil applications of disulfoton, phorate, thiofanox, aldicarb, and carbofuran to tomatoes for control of Leptinotarsa decemlineata (Say) showed disulfoton to be the least effective material. Presently, disulfoton is the only soil systemic labeled for use on tomatoes for control of this insect. The other insecticides gave season-long control of Colorado potato beetle. Band treatments were more effective than furrow treatments.