INSECT PEST SURVEY BULLETIN 
Vol. 16 Summary for 1936- No. 10 
INTRODUCTION 
An excellent opportunity for the study of the effect of weather on 
the ahundance and distribution of insects was afforded "by the yoar 193&, 
as the entire year was characterized by extremes in climatic conditions. 
The winter was abnormally cold over the entire United States, except in 
the southern Rocky Mountain and Great Basin States, and a narrow strip on 
the coast in the Northwest. Snowfall was the heaviest in many years in 
the region north of the Potomac, the Ohio, and the Missouri Rivers. The 
summer was unprecedently dry and hot from the Rocky Moxintains to the Appa- 
lachians and abnormally dry in the Eastern States. 
The break in the severe winter weather came the latter part of 
February and, following this, temperatures were almost continuously above 
normal for the month of March, except in the Western and Northwestern 
States, where abnormally cold weather prevailed the last week of the 
month. 
The month of April was cooler than normal over nearly all sections 
of the country east of the Rocky Mountains and warmer than normal gener- 
ally west of the Rockies. 
The temperature for May was above normal in practically all parts 
of the country. Precipitation varied greatly in different areas, rang- 
ing from much above normal to markedly deficient, the latter predominat- 
ing. The Southwest had heavy rain;-, the northern Plains States were 
dry, and from the Mississippi Valley eastward the month was one of the 
driest Mays of record. 
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