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Black Turfgrass Beetle

Black Turfgrass Beetle
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They fly in to lawns in May and June where they lay eggs in the thatch. Grubs feed over a two month period at roots and crown damage will become visible by late July. Grubs pupate in July and emerge as adults in August. Damage begins in late spring and becomes worse with hot, dry weather. Small irregular dead patches form into large dead sections. Weakened and dead grass is easily removed, revealing numerous pupae and grubs.
Adults are reddish-brown to shiny black beetles, also 1/8 to 1/4 inch long. Can overwinter in rough turf/grass in woodlots. Their eggs, larvae and pupae are found in well-maintained turf-grass/ lawns.