Farmers reported that 77.8 million pounds (a.i.) of pesticides were applied to soybeans in the North Central States during 1980. This consisted of 77.1 million pounds (a.i.) of herbicides and 700,000 pounds (a.i.) of insecticides. Pesticide acre—treatments totaled 58.1 million and consisted of 44.8 million with single material herbicides, 12.6 million with herbicide mixes, and 700,000 with insecticides. The primary herbicides were alachlor, bentazon, metribuzin, and trifluralin. The major insecticide was carbaryl. Herbicides were applied primarily to control cocklebur, foxtail, and velvetleaf infestations. Most insecticides were applied for armyworm, bean leaf beetle, corn earworm, grass— hopper, and Mexican bean beetle control. Coefficients of variation were computed for acres of soybeans treated with specific pesticide materials.