An economic analysis of a large number of field trials conducted between 1985 and 1989 of Temik and alternative early season insect control materials indicates that Temik provides meaningful yield and income increases when compared to alternative insecticide materials, both in furrow and foliar applied. In at least one test in most states an alternative material gave a higher return. However, when all tests considered in this study when averaged either on a state or regional basis an excellent return to the use of Temik is indicated. These returns range from a low of $16.73 per acre to a high of $56.59 per acre.