Fertility of Eggs of Mexican Bean Beetles from Females Mated Alternately with Normal and Apholate-Treated Males1

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Abstract
Adult male Mexican bean beetles, Epilachna varivestis Mulsant, were sterilized by feeding on bean foliage treated with apholate. When normal females were mated alternately first with the treated and then with normal males, the hatch was almost completely nonviable at first, became increasingly viable, decreased again to about 50% sterile, and finally rose to normal. When the first mating was with a normal male, the depression in viability caused by matings with sterile males was less. The greatest influence on viability was that of the most recent mating, but earlier matings did contribute.