Attractants for Japanese Beetles Tested in the Field1

Abstract
Of 19 attractants tested for attractiveness to the Japanese beetle, Popillia japonica Newman, about 50% were superior to the standard bait, anethole-eugenol (9:1). Phenyl ethyl butyrate, caproic acid, a combination of both, or either in combination with eugenol, were outstanding. Generally, fermenting baits were inferior. Phenyl ethyl butyrate-eugenol (9:1) and technical geraniol-eugenol (9:1) were about twice as efficient as the standard. The standard attractant was diluted with Deobase® (deodorized kerosene) to ½ its concentration with no loss in attractancy.

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