Cucumber beetles are the primary insect pest of all vine crops in Michigan. Striped and spotted cucumber beetles attack a variety of cucurbit crops, including winter and summer squash, cucumber and watermelon. While cucumber beetle larvae feed on cucurbit roots, adult beetles cause more economically important damage. Striped cucumber beetles are specialists on cucurbits while spotted cucumber beetles feed on other plants in addition to cucurbits. Striped cucumber beetle adults are roughly 0. Spotted cucumber beetle adults are slightly larger, yellow or yellowish-green with 12 black spots, a black head and a yellow abdomen Photo 2.
Cucumber Beetle, Striped
Cucumber beetles in home gardens | UMN Extension
Skip to content. Striped cucumber beetles are approximately 7 mm-long, yellow beetles with three black stripes that reach the end of the forewings, a yellow thorax, and a black head. Larvae are 9 mm long, creamy white with black heads and with three pairs of short legs. Striped cucumber beetle eggs are pale orange-yellow and are laid in groups near the base of cucurbit plants. Adults overwinter in field edges near last year's crop, with a small proportion remaining in the field. With the onset of warm days usually mid-June , beetles move rapidly into young crops to feed, mate, and lay eggs at the base of the plants. When the eggs hatch, the larvae develop for weeks on the plant roots, then pupate in the soil.
How to Control Pesky Cucumber Beetles in Your Garden
Finding small striped or spotted beetles on your cucurbit crops? They could be cucumber beetles! If you find that the stems of your seedlings are being eaten off, leaves are yellowing and wilting, and holes are appearing, you may have a striped or spotted cucumber beetle problem.