INSECT FESI SURVEY BULLETIN 
Vol. 15 Supplement to Ho. 1 March 15, 1936 
CHINCH 3UG ABUNDANCE IN HIBERNATION QUARTERS 
NOVEfBER-DECE u3ER 1955 
C. M. Packard, Senior Entomologist , 
Bureau of Entomology and I lant Quarantine . 
United States Department of Agriculture 
The accompanying ma^> is ba.sed on early vinter surveys of the a/rea 
infested by chinch hugs in 1935 and adjacent areas, conducted by the State 
entomologists of Kichigan, Ohio, Indiana, Illinois, Wisconsin, Minnesota, 
Iowa, Missouri, Nebraska, Kansas, and Oklahoma , either in cooperation with 
the Bureau of Entomology and Plant Quarantine or entirely on State funds. 
These surveys were supplemented by reports from State and Federal entomolo- 
gists. Most of the surveys were based on hibernating bugs. Some oi the 
information, however, was based on the infestation in standing corn late in 
the season. In view of the varied concdtions and tynes o:i cover in differ- 
ent regions and unavoidable differences in survey methods the degrees of 
severity indicated on the ma _ o are only approximate. 
Hibernating 'xnulations in general are considerably lighter than 
they vere a year ago and the area in which chinch bugs are present in 
dangerous numbers is considerably less, fragmentary remorts from Iowa, 
Illinois, and Indiana also indicate a winter mortality of about 50 percent 
over a rather extended area. The -orosmect of severe and widespread injury 
in 193S is, therefore, decidedly les^ threatening than in 1935. At the 
sane time, the bugs are still so numerous that shotted injurious infesta- 
tions in several States, with rather severe and general infestation in the 
heart of the Corn Belt, may occur if snring and early summer weather condi- 
tions are favorable to chinch bug activity. 
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