Synergistic and antagonistic responses of soil insecticide‐herbicide combinations for corn root worm, diabrotica spp. control
Abstract The expected response of an insecticide‐herbicide combination is derived from the actual response of individual pesticides. Root ratings, a standard measure of efficacy for soil insecticides used to control the corn rootworm are converted to a percent control figure through a polynomial equation. The expected response is a product of percent of control values for insecticides and herbicides applied alone and dividing by 100 (n‐1) where n 1s the number of pesticides in a respective combination. Specific antagonistic/synergistic insecticide‐herbicide combinations may be detected in the field using this method.