INFESTATION by insect pests of stored grains is one of the principal causes of food losses in developing countries1. Fumigation and treatment with conventional organic insecticides are handicapped by the problems of residual toxicity and the development of resistant strains of insects. Williams2,3 has pointed out that juvenile hormone or its chemical analogues could be used as insecticides free from such disadvantages. We have explored the possibility of using a chemical analogue of juvenile hormone—methyl 3,7,11-trimethyl-7,11-dichloro-2-dodecenoate4 (MTDD)—in controlling the multiplication of stored grain pests and the preliminary results are reported in this communication.