Dispersal of pathogenic material for pest control

In the method of controlling Japanese beetles wherein the ground is innoculated with spore dust, said spore dust comprising an inert dust and spores for causing milky disease in the larvae of Japanese beetles, larvae of Japanese beetles ingest said spores and die from milky disease, the improvement including the steps of luring adult Japanese beetles into a container with bait, directing said adult Japanese beetles into a sufficient quantity of said spore dust that said adult Japanese beetles are substantially immersed in said spore dust, and allowing said adult Japanese beetles to escape from said quantity of spore dust and act as a carrier to distribute the spore dust that clings to said adult Japanese beetles to effect said innoculation of the ground.