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These brownish, gray or black bugs suck juices from the leaves and stems of plants, causing them to wilt, dry up, and turn black. Squash bugs attack all types of squash plants and can also damage cucumber plants.
Adult squash bugs are approximately 1/2" long, with a broad, flattened back. Nymphs resemble adults but are smaller and lighter in color with black legs. Adults and nymphs are often present at the same time. Adults overwinter in plant debris or in the soil, and typically emerge in early summer about the time that vines begin to "run." They lay clusters of reddish-brown eggs on the undersides of leaves. There are one to three generations per year, depending on the region. Squash bugs are found throughout North America.
Last updated: 8/8/19
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