Calcium Cyanide for Chinch Bug Control

Cover Calcium Cyanide for Chinch Bug Control
Calcium Cyanide for Chinch Bug Control
W P Wesley Pillsbury Flint
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In 1923 this trap crop and cyanide combination was tested more thoroly. Strips of oats, millet, Sudan grass, and corn were sown be- tween heavily infested fields of small grain and of corn. These strips were treated with flake, granular, and dust calcium cyanide at varying intervals and at varying rates of application. Altho these tests ex- tended over the migration period of one season, the results were not conclusive. Apparently this method is not so effective as the creosote barrier with the
... cyanide laid along it or in strips at right angles to it. However, the method may be worth trying under some conditions.
Of the trap crops used on the University Farm in 1923, Sudan grass was decidedly the most effective. It is very attractive to chinch- bugs and withstands a considerable amount of feeding by them before it is killed. It is vigorous, and hence can also endure the bruising by teams and machinery which occurs in cultivating the corn. It is not easily killed by heavy applications of calcium cyanide, and the sheaths of the leaves fit so tightly to the stems that chinch-bugs can- not get between them and the stalk and thus be protected from the fumes of the gas.


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