The green mirid, Creontiades dilutus (Hemiptera: Miridae), is a serious pest of cotton in Australia (Adams and Pyke, 1982). Minds are sucking insects which feed preferentially on the actively growing points of young plants. The damage they inflict to the tips of pre-squaring cotton and to early squares can result in delayed maturity of the plants and a reduced yield (Bishop, 1980). Current control of the green mirid relies on early season chemical sprays. The use of chemical insecticides is disruptive to beneficial insect populations as well as being expensive and environmentally harmful. One new strategy for insect control is the use of genetic engineering to produce plants resistant to insect attack. Chemical control of Heliothis armigera has already been augmented with the use of cotton plants expressing Bacillus thuringiensis (Ali and Young, 1993). A similar strategy for control of the green mind would be a desirable alternative to chemical insecticides.