. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Washington, D. C. Contribution from the Bureau of Entomology L. O. HOWARD, Chief. PROFESSIONAL PAPER December 21, 1920 CLOVER-LEAF WEEVIL. By D. G. Tower and F. A. Fenton, Cereal and Forage Crop Insect Investigations. CONTENTS. Page. Introductory 1 Distribution 1 Description 2 Adult 2 Egg 3 Larva 3 Cocoon 5 Pupa 5 Pood plants and injury - 6 Page. Life history 6 Life cycle 6 Copulation 11 11 Habits 12 Feeding experiments 12 Natural enemies 16 Control 18 Literature cited INTRODUCTORY. The clover-leaf we
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Washington, D. C. Contribution from the Bureau of Entomology L. O. HOWARD, Chief. PROFESSIONAL PAPER December 21, 1920 CLOVER-LEAF WEEVIL. By D. G. Tower and F. A. Fenton, Cereal and Forage Crop Insect Investigations. CONTENTS. Page. Introductory 1 Distribution 1 Description 2 Adult 2 Egg 3 Larva 3 Cocoon 5 Pupa 5 Pood plants and injury - 6 Page. Life history 6 Life cycle 6 Copulation 11 11 Habits 12 Feeding experiments 12 Natural enemies 16 Control 18 Literature cited INTRODUCTORY. The clover-leaf weevil, Hypera 'punctata Fab. (fig. 1), ranks as one of the important clover pests. Although it is usually unnoticed, it annually exacts its toll of the crop. It seldom devastates entire fields, however, because the larvae are ordinarily checked by an ever-present fungous disease which spreads rapidly and reduces their numbers to a negligible quantity in a remarkably short time. DISTRIBUTION. This insect was introduced accidentally into this country from Europe, where it is well known. It also occurs in northern Asia and probably in central Asia and China. So far as known it is the only species of Hypera that has reached this country, the genus being indigenous to the eastern hemisphere. The first record of Hypera punctata occurring as a pest in the United States was in 1881 when a severe outbreak occurred at Bar- rington, N. Y. A single specimen taken about 1850-1855 in Canada by the Geological Survey and identified by Dr. LeConte in 1876 shows that this species had been in America for some time before becoming noticeable or seriously injurious. 15131°—20—Bull. 922 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. ,
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