Would like to know the best nematodes for mid-Michigan. We have lots of grubs. I'm guessing Japanese beetles bc they attack our garden all summer.
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Neomatodes for yard #928188
Asked April 12, 2026, 7:52 PM EDT
Would like to know the best nematodes for mid-Michigan. We have lots of grubs. I'm guessing Japanese beetles bc they attack our garden all summer.
Ingham CountyMichigan
Expert Response
I don't have a lot of experience with beneficial nematodes. However, Heterorhabditis bacteriophora is an organic microscopic worm that parasitizes and kills lawn grubs. They require moist soil, temperatures between 60°F and 85°F, and are best applied in early fall or late summer (late July-August) when grubs are small and young. If you have grubs that overwintered and are feeding you can also treat now.