bean beetle


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bean beetle,

common name for a destructive beetle, Epilachna varivestis, of the ladybird beetleladybird beetle
or ladybug,
member of a cosmopolitan beetle family with over 4,000 species, including 350 species in the United States. Ladybird beetles are mostly under 1-4 in. (6 mm) long and are nearly hemispherical in shape, with very short legs.
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 family. Although nearly all other members of this family are beneficial carnivores, the bean beetle attacks leguminous plants, especially beans. Both larva and adult feed on the undersides of leaves and sometimes on the pods. The adult is yellow, with black spots; the yellow, oval-bodied larva has forked spines. Bean beetles overwinter as adults and in early spring lay masses of 10 to 50 eggs on the undersides of leaves. One to four generations occur annually, each requiring about a month to mature. Since most damage occurs during July and August, early-maturing beans suffer the least damage. Removing old bean plants helps to destroy overwintering beetles, although many escape to nearby sheltered areas. Chemical insecticides are used for control. Before 1920 the bean beetle, also called Mexican bean beetle, was found only in the SW United States, but it now occurs throughout most of the United States, except on the Pacific coast. It is classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Coleoptera, family Coccinellidae.
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References in periodicals archive ?
BEAN BEETLE EXPERIMENT Goal: To formulate a hypothesis and design an experiment to test your hypothesis.
maculiventris in an integrated pest management (IPM) program to control the Mexican bean beetle, Epilachna varivestis Mulsant, on snapbeans requires knowledge of predator susceptibility to recommended insecticides.
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In the garden, dwarf marigolds inter-planted with snap beans ward off bean beetles.