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Boll Weevil (Anthonomus grandis)


Detailing the identifying qualities of the Boll Weevil, including physical features and territorial reach.


 Updated: 2/8/2018; Authored By Staff Writer; Content ¬©www.InsectIdentification.org







  Boll Weevil  
Picture of Boll-Weevil


The Boll Weevil is historically known as the greatest pest that cotton plants growing in the South have ever faced.





The bane of cotton farmers in the late 19th and early 20th century, the Boll Weevil has been controlled and managed with good results in the 21st century. The only plant this particular weevil attacks is cotton, which happens to comprise the most popular fabric in North America. After heavy use of pesticides to reduce Boll Weevil populations did not completely eradicate their threat to cotton crops, the cotton plant itself was genetically altered to eliminate the Boll Weevil's interest in eating it. The Boll Weevil Eradication Program (BWEP) was initiated and a gene was inserted into the cotton plant's DNA that allowed the cotton plant to produce a chemical protein that is toxic to Boll Weevils. The effectiveness of this genetically modified cotton led to the drastic reduction in the amount of pesticides that are used on cotton plants.

A small, but growing percentage of farmers do not use the genetically altered cotton plant. They sell an organic cotton harvest, which has recently become more attractive in the American clothing, linen and bedding markets. Natural predators of the Boll Weevil include spiders, fire ants and a parasitic wasp native to Mexico.

The Boll Weevil itself has an extremely round body and can be a shade of brown or gray with short hairs covering its thorax and abdomen ('shoulders' and 'tail'). It has a tubular mouthpiece that resemble the shape of an anteater's snout or a downward-curved elephant's trunk. The Boll Weevil gets its name from the cotton bolls it destroyed Cotton bolls are hold the white tufts most people are familiar with. Bolls are the protective cases around the fibrous balls of cotton. As the cotton plant forms buds, the Boll Weevil devours the buds, preventing any usable cotton tuft from developing.








Boll Weevil Information



Category: Beetle
Common Name: Boll Weevil
Scientific Name: Anthonomus grandis
Other Name(s): Weevil


Taxonomy Hierarchy



 Arrow graphic Kingdom: Animalia
  Arrow graphic Phylum: Arthropoda
   Arrow graphic Class: Insecta
    Arrow graphic Order: Coleoptera
     Arrow graphic Family: Curculionidae
      Arrow graphic Genus: Anthonomus
       Arrow graphic Species: grandis

Size, Identifying Tags and Territorial Reach



Size (Adult, Length): Size (Adult, Length): 3 mm to 13 mm (0.117 inches to 0.507 inches)
Identifying Colors: brown; gray
Additional Descriptors: harmful, snout, trunk, nose, anteater, hairy

North American Territorial Reach (Though Not Limited To): Alabama, Arizona, California, Florida, Georgia, Louisiana, Mississippi, New Mexico, North Carolina, South Carolina, Texas, Virginia

A Note About Territorial Reach: Keep in mind that an insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above. Insects are driven by environmental factors, food supplies and mating patterns and do not nescessarily work within hard-and-fast territorial lines like we humans do.

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