boll weevil

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boll weevil


cotton boll weevil

(bōl), cotton-eating weevilweevil,
common name for certain beetles of the snout beetle family (Curculionidae), small, usually dull-colored, hard-bodied insects. The mouthparts of snout beetles are modified into down-curved snouts, or beaks, adapted for boring into plants; the jaws are at the end of the
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, or snout beetle, Anthonomus grandis. Probably of Mexican or Central American origin, it appeared in Texas about 1892 and spread to most cotton-growing regions of the United States. Over the years the weevil became a significant pest, destroying about 8% of the annual U.S. cotton crop. Boll weevil devastation was a major reason for diversification of the South's historic cotton economy. In 1978, however, the U.S. Dept. of Agriculture began a concerted eradication campaign. By the end of the century the weevil had disappeared from from most of the nation except Texas, Louisiana, and Mississippi, where the campaign continued.

The young adult is grayish, darkening with age, and about 1-4 in. (6 mm) long, with a long snout for boring into the cotton boll, or seed pod, where weevils feed on the cotton fibers. Weevils may also invade cotton flower buds before they mature into bolls. Females lay eggs within the bud or the boll, where pupation (see insectinsect,
invertebrate animal of the class Insecta of the phylum Arthropoda. Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.
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) occurs. The larvae eat the entire contents of the boll. Metamorphosis from egg to adult takes about three weeks; from 2 to 10 generations occur each season. The weevil's resistance to some poisons, and the removal of some poisons from the market, have encouraged Integrated Pest ManagementIntegrated Pest Management
(IPM), planned program that coordinates economically and environmentally acceptable methods of pest control with the judicious and minimal use of toxic pesticides.
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, e.g., the use of safer insecticides, synthetic growth regulators, and pheromone traps, and the release of sterile males to frustrate reproduction. Adults are also controlled by elimination of field litter, especially cotton stalks, in which they overwinter. Short-season cotton, bred to mature early, escapes much damage from weevil larvae.

The boll weevil 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 Curculionidae.


See P. P. Sikorowski et al., Boll Weevil Mass Rearing Technology (1984); G. Matthews and J. Tunstall, Insect Pests of Cotton (1992).

boll weevil

[′bōl ‚wē·vəl]
(invertebrate zoology)
A beetle, Anthonomus grandis, of the order Coleoptera; larvae destroy cotton plants and are the most important pests in agriculture.
References in periodicals archive ?
Adult boll weevils of known age (one to four days after emergence) were collected from attacked squares in the field and from larvae fed an artificial diet (Monnerat et al.
Eradication Foundation, which operates boll weevil eradication programs
By the early 1990s, "the boll weevil was literally ruining our cotton business," said Woody Anderson, a Colorado City farmer and longtime advocate for the program.
So the boll weevils in India became super-resistant and farmers were still stuck with planting Monsanto's GM seeds forever, basically.
Objection, with the exception of the boll weevils, what does this have to do with anything?
The Boll Weevils broke with their party and gave the president what he called "the greatest political win in half a century.
Este trabajo fue financiado por el Common Fund for Commodities a traves del "Project on Integrated Pest Management of the Cotton Boll Weevil in Argentina, Brazil and Paraguay CFC/ICAC/04".
Kansas is free of boll weevils and--even with prices at 30-year lows--1,000-pound-per- acre cotton harvests can generate more income than a 200-bushel-per-acre corn crop (a corn yield that is hard to sustain).
The team found insignificant amounts of organophosphate insecticides used to control boll weevils in runoff from either the Bt or non-Bt cotton sites.
In April, scientists suggested that instead of protecting farmers from boll weevils, Bt cotton was causing a major resurgence of the pest in the U.
And they would be wiser still to ponder the politics of the Blue Dog Southern Democrats and at least some of the Democratic Leadership Council-linked New Dogs--who are ideologically and politically inclined to become the Boll Weevils of the new Congress.