Regulation of Sex Pheromone Titer in Mated Gypsy Moth Females
Females of gypsy moth, Lymantria dispar, produce a sex pheromone, cis-2-decyl-3-(5-methylhexyl) oxirane, or disparlure, to attract their mates. After successful mating the females become nonreceptive to other males and commence oviposition. In Heliothis zea, it was reported that mating caused a rapid decline in the pheromone titer of the females but that the titer increased again on subsequent nights following the night of mating (Raina et al., 1986). The present study was initiated to investigate the fate of the sex pheromone in mated gypsy moth females and to determine the mechanism through which the switch from virgin to mated behavior operated.
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