Every year there is a growing interest in controlling Japanese beetle grubs using alternative pest control materials such as microbial-based insecticides and beneficial nematodes.
Japanese beetles were first introduced into this country in the early 20th century. By 1948 one of the first microbial insecticides ever registered in the United States was being used to controlJapanese beetle grubs in turfgrass. That microbial insecticide is milky spore. Milky spore disease (Bacillus popillae) is a bacterium applied to turf grass as a dust. It’s effective only in controlling Japanese beetle grubs. Japanese beetle grubs must ingest the bacteria.