One of the most prevalent and destructive leaf-feeding beetles in North America is the Mexican bean beetle, Epilachna varivestis Mulsant . Mexican bean beetle. Epilachna varivestis Mulsant, Epilachninae. Tribe: Epilachnini. Genus: Epilachna. Subject: Epilachna varivestis Mulsant, Epilachna varivestis Mexican Bean Beetle – Epilachna varivestis larva – Epilachna varivestis WI – 1 – Epilachna varivestis Squash Lady.
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Mexican bean beetle
Adults are oval in shape and orange to copper-colored with eight black spots on each wing cover. They resemble lady beetles and ar one of three coccinellid species which are plant feeders.
Adults are about 6 to 8.
Larvae reach a maximum length of 9 mm; are yellow, soft, and grublike; and are covered with six rows of dark, branched spines. Soybean and other legumes, including many varieties of beans, alfalfa, clover, cowpeas, beggarweed, and kudzu.
On soybeans larvae and adults cause injury by feeding on the surface of varuvestis tissues.
Epilachna varivestis – Georgia Invasive Species Task Force
The tissue that remains gives the leaf a lacy appearance. Damaged tissue will die and turn brown. Adults overwinter in plant debris and other protected places and emerge when surrounding temperatures reach 50 degrees. Because temperatures will vary by overwintering location, emergence occurs for several weeks.
Adults live for about six weeks, and females lay several hundred yellow-orange, elliptical eggs in groups of 40 to 60 on epilachnz undersides of leaves. Eggs hatch in about a week depending on temperatureand larvae feed 2 to 4 weeks. Last instar larvae attach their abdominal end to a leaf and pupate. The pupation period last 5 to 10 days. There are 3 to 4 generations each year.
Mexican bean beetle, Epilachna varivestis Coleoptera: Coccinellidae
Discussion View source History. Varjvestis varivestis From Bugwoodwiki. Epilachna varivestis Mulsant, Retrieved from ” http: This page was last modified Based on work by Salina McAllister.