Answer: These dark brown, flat-backed insects fly into gardens in late spring, and immediately begin to suck the juices out of squash leaves, causing the leaves to wilt and turn black. Females lay yellowish-gold eggs on the undersides of squash leaves; within a few hours the eggs darken to brown. The nymphs hatch in 5 to 14 days, and, like the adults, begin to feed on the leaves. Insecticidal soap works well against both adults and nymphs, but not on the eggs. Inspect plants daily, and spray and/or hand-pick and crush any adults and nymphs you see. Crush eggs between two hard surfaces. Avoid deep mulches which give the insects a place to hide, and after your harvest remove and destroy all vines to remove overwintering sites.
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