Abstract
Abstract A rapid method for assessing the presence of pine voles (Microtus pinetorum LeConte) in experimental plots was based on an apple activity test. This test was easily adapted to surveying the effect of grower applied treatments. Chlorophacinone (CPN) was superior to Endrin ground sprays for pine vole control in an orchard where Endrin had been used annually for over 10 years. Low levels of CPN at 0.112, 0.056, and 0.028 kg/ha (0.1, 0.5, 0.025 lb./acre) did not give adequate control of pine voles, and 0.224 kg/ha (0.2 lb/acre) appeared to be the lowest possible dosage level for control.
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