Tommy Doederlein], Texas AgriLife IPM agent, also tested an insecticide with a harvest aid to determine if he could lower aphid numbers, reduce honeydew levels, and keep the pests off grain. He added malathion to the harvest aid treatment. "We wanted to keep the crop viable until harvest," he says, "and keep the aphids from the panicles. Malathion wont control aphids, but it does push them down the stalk and away from the panicles.