boll weevil

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Related to Anthonomus grandis: Cotton Boll Weevil

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).

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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
O numero medio de adultos de Anthonomus grandis (Boh.) e Edessa meditabunda (Fabr.) foi significativamente maior em NuOpal[R] utilizando o metodo de amostragem de planta inteira.
The non-target species Anthonomus grandis (Boheman, 1843) was found to be abundant in Bt cotton with both sampling methods.
TABLE IV MEAN NUMBER (SD) OF INDIVIDUALS FROM DOMINANT NON-TARGET PEST SPECIES PER TYPE OF COTTON AND SAMPLING METHOD Bt-cotton (3) Non-Bt cotton (3) Whole plant Stage 2 (n=272) (n=272) Horciasoides nobilellus Ad 2.25 (3.28) 2.02 (3.29) Anthonomus grandis Ad 0.86 (1.62) a 0.57 (1.19) b Agallia albidula Ad 1.16 (1.47) 0.96 (1.33) Nezara viridula N 0.06 (0.25) 0.03 (0.17) Nezara viridula Ad 0.17 (0.59) 0.19 (0.56) Euschistus heros N 0.04 (0.23) 0.03 (0.19) Euschistus heros Ad 0.38 (0.84) 0.31 (0.95) Edessa meditabunda N 0.04 (0.38) 0.03 (0.20) Edessa meditabunda Ad 0.43 (1.08) a 0.24 (0.73) b Dysdercus sp.
Plantas alimenticias alternativas del picudo de algodonero (Anthonomus grandis Boh.) (Coleoptera: Curculionidae) em la Provincia de Formosa, Argentina.
Anthonomus grandis Boheman (Coleoptera: Curculionidae) en la zona central y sur oeste de misiones, Argentina: polen como fUente alimenticia y su relacion con el estado fisiologico en insectos adultos.
These 3 parasitoid species had been obtained from biological control programs against the boll weevil (Anthonomus grandis Boheman).
Arthropod parasites of the boll weevil, Anthonomus grandis: 1.