棉铃虫雄性信息素的研究Ⅰ．与雄蛾味刷有关的交配行为的观察

STUDIES ON THE MALE SEX PHEROMONE OF COTTON BOLLWORM Heliothis armigeraⅠ.COPULATION BEHAVIOR OF COTTON BOLLOWORM

与雄性信息素有关的棉铃虫的交配行为可分为雌蛾求偶、雄蛾反应、接近雌蛾、打开味刷以及交配成功等阶段，雌、雄蛾单独放置，雌蛾求偶行为正常进行；雄蛾的前期交配行为如触角前伸、振翅、飞行等行为，即使在没有雌蛾刺激的前提下也能在确定的黑暗周期如期发生。光周期紊乱的雄蛾不能同正常雌蛾交配，处于求偶高峰期的３日龄雌蛾与１～４日龄雄蛾配对时，３日龄雄蛾与雌蛾交配率高达８０％，而其它几个日龄的雄蛾与雌蛾的交配率明显偏低，去掉雌蛾触角交配率下降至４０％；除去一根雄蛾触角仍能交配，但交配率下降；去掉两根雄蛾触角则完全不能交配，雄性信息素组分对雌蛾求偶没有影响。

The coputation behavior related to male sex pheromone of cotton bollwormwas examined by direct observation. The behavior can be divided into following sequence:fe-males calling,male responsing, male approaching female,hai vpencil displaying,and copulat-ing。When both females and males were three days old females'calling behavior is not affect-ed by isolation from males and females maintained in the space with odors of male sexpheromone components.Furthermore,males isolated from females with no opportunity forcontamination by femal sex pheromone exhibited sexual behavior,which occurs simultane-ously with female calling behavior when both sexes maintained at the same conditions.Com-paring with females of three days old paired with males aged from one to four days,the cop-ulcation rate reached as high as 80%only both females and males all were three days old.A-mong several treatments,males with one antenna,females with no antennae paired with no-mal opposite sexes can keep their copulation ability.On condition that females with no anten-nae the copulation rate decreased by 40%;Males with no antennae and no hairpencil can notcopulate anymore,The ultramacroscopic structure of the scales on hairpencils was observedby Scanning electron microscpy。Also,the behavior of male hairpencil display was discussedin the paper.