Abstract

The squash beetle (Epilachna borealis Fab.) is one of two species of Coccinellidae known to occur in the United States which are not carnivorous but phytophagous in nature. The squash beetle feeds upon the leaves of cucurbitaceous plants. The other species, the Mexican bean beetle (Epilachna varivestis Muls.) , a close relative of the squash beetle, is a serious bean pest. All our other lady beetles are carnivorous, and beneficial because they feed on injurious insects, such as aphids and scale insects.

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