Abstract
Abstract Ten insecticides were applied to roses to test their effectiveness against Japanese beetles. Plants were sprayed until runoff on July 14 using a 1-gallon B & G compressed air sprayer operated at 30 psi. Temperature at the time of treatment was 88°F. After plants were dry, foliage bouquets were cut and placed in 250 ml flasks which in turn were placed inside 1-gallon wide-mouthed jars with screened lids. The jars were placed inside a walk-in environmental chamber, held at approximately 80°F. Japanese beetles were field collected and 10 placed in each of 3 replicates per treatment plus an untreated control. After 24 hours the number of live beetles was recorded.
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