Egg Viability and Longevity of Japanese Beetles Treated with Tepa, Apholate, and Metepa1

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Abstract
Laboratory studies with tepa, apholate, and metepa showed that the topical application of these compounds to adults of the Japanese beetle, Popillia japonica Newman, at dosages between 1.58 and 50 µg resulted in varying levels of egg infertility. Tepa Was the most effective sterilizing agent, then apholate, with metepa the least effective. Application of apholate to males and to both males and females resulted in a high degree of egg infertility, but application of the same compound solely to females did not appear to inhibit production of fertile eggs. Interchange of apholate-trcatcd and untreated males between 2 groups of untreated females resulted in production of ova with fertility dependent on whether the last mating partners of the females had been treated with the chemo-sterilant.