Precocene Induction of Tick Sterility and Ecdysis Failure1

Abstract

Argas persicus, Ornithodoros coriaceus and Rhipicephalus sanguineus were sterilized and their ecdysis inhibited by treatment with precocene, a reported anti-juvenile hormone. Precocious metamorphosis was not observed. When juvenile hormone was applied to precocene-treated nymphs, the percentage remaining in that instar increased and survival was higher. Juvenile hormone alone had no effect.