Adjustments within the industry

Summary

In summarizing, it can be said that, in northeastern Ohio during the years of 1931 to 1934, the soil reaction within narrow limits was not an important factor in determining the local distribution ofAgriotes mancus Say.

Although soil moisture may be an important factor, drought conditions have not reduced the degree of infestation, but, instead, a marked increase in population was noted after seasons of the most extreme drought and after a drought period of 4 years.

A series of six different crop rotations has not brought about a redistribution of the insect under observation.

The organic matter content of the soils studied at the Northeastern Experiment Farm has held a positive relationship with wireworm populations and tuber damage.

From the data thus far obtained it appears that none of the individual factors hitherto given credit for controlling wireworm distribution is alone responsible and that the distribution is governed by a complex of these factors and others which can best be described by the term “soil type.”