Identifier: mexicancottonbol114hunt (find matches)
Title: Mexican cotton-boll weevil : Message from the President of the United States, transmitting a communication from the Secretary of Agriculture submitting a report on the Mexican cotton-boll weevil
Year: 1912 (1910s)
Authors: Hunter, W. D. (Walter David), 1875-1925 Pierce, W. Dwight (William Dwight), 1881-1967
Subjects: Boll weevil
Publisher: Washington, D.C. : (Govt. print. off.)
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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on has been most carefully watched.The uniform failure to find the weevil feeding upon any other plantmakes it practically certain that cotton is its only food plant. Ofcourse, t he insect sometimes alights upon other plants, as it does uponfence posts and other objects. Such occurrences are altogether acci-dental. Frequent reports of the finding of the weevil breeding inother plants are due to mistaking some other insect for the enemy ofcot ton. LIFE HISTORY. SUMMARY.1 The egg is deposited by the female weevil in a cavity formed byeating into a cotton square n\- boll. The egg hatches in a few daysand the footless grub begins to \\h^\. making a larger place for itselfgrows. During the course of its growth tin4 larva sheds its skinat least t hree times, the third molt being at the formation of the pupa,which after a few day- sheds it- skin, whereupon the transformation >m Bulletin 51, Bureau of Entomology, pp. 90,31. 14, Bureau of Entomology, U. S. Deot. of Agriculture. a Plate III.
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Anatomical Structure of the Boll Weevil. a, Dorsal view of anal segments of larva; b, front view of head and anterior segments oflarva; c, ventral view of anal segments of larva; d, lateral view of adult; e, lateral view oflarva; /, ventral view of adult; g, dorsal-view of adult with wings spread; h, ventral viewof pupa; i, ventral view of anal segments of pupa; j, ventral view of anterior portion ofpupa. (Original.) . DESCRIPTION. 33 becomes completed. These immature stages require on the averagebetween two and three weeks. A further period of feeding equal toabout one-third of the preceding developmental period is required toperfect sexual maturity so that reproduction may begin. DESCRIPTION. THE EGG.1 The egg of the boll weevil is an unfamiliar object even to manywho are thoroughly familiar with the succeeding stages of the insect.If laid upon the exterior of either square or boll, it would be fairlyconspicuous on account of its pearly white color. Measurementsshow that it is, on t

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