Abstract
Investigations in control of the bronze birch borer, Agrilus anxius Gory, and the flat headed apple tree borer, Chrysobothris femorata (Olivier), were conducted at the Ohio Agricultural Experiment Station during 1956 and 1957. Several of the oregano phosphates and various concentrations of DDT were applied to the respective host trees. Parathion was consistently effective in the three tests in which it was used. The results with DDT were erratic, but the data indicate that one application of a relatively strong concentration of DDT combined with a liquid latex or polyethylene on the trunks of newly transplanted shade trees may be adequate for the control of the flat headed apple tree borer.
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