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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Precipitation and irrigation as factors in the distribution of the Mexican bean beetle Epilachna corrupta Muls.
Examples of CRE projects that involve discovery include describing a new bacteriophage, determining environmental factors for optimal yeast growth, evaluating the critical nutrients for the development of bean beetles, fabricating nanoparticles to limit bacterial growth, and assessing mercury contamination and biogeochemical cycling in a local watershed.
(1970) (-)-Methyl n-tetradeca-trans-2,4,5-trienoate, an allenic ester produced by the male dried bean beetle, Acanthoscelides obtectus (Say).
The following week, students (in groups of 4) in the experimental section spent about half of the lab designing their own experiments using bean beetles. Students either picked a question from a list or formulated their own observation-based question (Figure 1), and then developed an original hypothesis.
Residual activity of selected insecticides against the adult Mexican bean beetle (Coleoptera: Coccinellidae) on soybeans.
The strength and form of induced responses to Mexican bean beetle damage also varies among genotypes, and these induced responses affect beetle feeding preference, mortality, and growth in the lab (Kogan and Fischer 1991, Underwood 1997).
The bean beetle Callosobruchus maculatus is a facultatively aphagous pest of stored legumes.
In contrast, female Mexican Bean beetles (Epilachna varivestis) reared as larvae on young, good-quality host foliage were heavier and flew longer than those reared on senescent, poor-quality foliage (Saks et al.
I have used Pediobius wasps for quite effective control of Mexican bean beetle. However, Pediobius is not native to my area, and will not survive the winter as an ongoing population.
(1988) to be highly resistant to Mexican bean beetle, Epilachna varivestis Mulsant.
Notice of release of five lines of soybean resistance to Mexican bean beetle. Plant Resist.
The most aggravating pest is the Mexican bean beetle. We check the undersides of leaves when we are picking the beans.