Abstract:Napocheima robiniae is a serious pest of the black locust in Shanxi, Shanxi, Shandong, Henan, Hebei Provinces of China. The area of serious damage was only about 10000 mu in Shanxi early in the sixties, but it is more than 100000 mu in the eigties. It was controlled with poison pencil that poisoned female moths over 80%. The number of larvae decreased 98% when bound band of plastic film on the trunk, and wiped out the eggs on it. The mortality of the first instar larvae reached 98.4-99.9% when sprayed dimilin to the eggs cluster, spraying the water suspension of Bacillus thuringiensis and Beauveria bassiana to the 3—4 instar and fullgrown larvae a 60.0—81.3% and 49.0—55.6% mortality was obtained respectively. The increment of timber reached 0.178—0.225m3 per mu for the control.