How to protect your plants from squash bugs Keep your plants healthy The nymphs die when temperatures drop to freezing. The adults fly or crawl to sheltered places for the winter. In the fall, especially after the vines have died, the adults and nymphs group together on squash fruits. The life stages overlap and all of them can be seen at any given time during the growing season. One generation develops each year, although it is possible that in some summers there is a partial second generation. Both adults and nymphs hide under leaves when disturbed. The females usually start appearing in gardens in early June and continue to lay eggs through mid-summer.Įggs hatch in about 10 days, and nymphs mature in about four to six weeks. When adults come out in the spring, they fly to growing cucurbit plants to feed and mate.įemale squash bugs lay small clusters of eggs (about 20) on the undersides of the leaves, especially between the veins where they form a V. Squash bugs can live through the winter as adults in sheltered places, such as under plant debris, around buildings, or under rocks.
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