Trunk Injection of Dicrotophos and Trunk Implantation of Acephate to Control Foliar Pecan Pests

Abstract

Pecan trees treated with low pressure trunk injection of dicrotophos retained 33-76% of their foliage in late fall and control trees retained only 15%. Two injections increased foliage retention at the 2 gm/15 cm trunk circumference rate over a single injection. Treatments of dicrotophos had the most significant impact on populations of the black-pecan aphid, and yellow aphids. Acephate trunk implantation was not effective in controlling foliar pecan insects.