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The UC Guide to Healthy Lawns

Black turfgrass ataenius — Life cycle


Adults burrow into the thatch and upper soil where they lay clutches of 11 or 12 eggs. Eggs hatch into grubs, which take several weeks or months to mature depending on the season. The pest pupates in the soil. At least two or three, and possibly up to five, generations develop in California each year. Populations of adults are highest between June and September.
Black turfgrass ataenius larva
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Statewide IPM Program, Agriculture and Natural Resources, University of California
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