观察在室内条件下小菜蛾的交配行为和能力,为探明小菜蛾[ Plutella xylostella(L.)]在自然条件下的交配规律提供参考.结果表明:成虫羽化后当天即可进行交配,雄虫可以多次交配；全天有3个交配高峰值,分别为12:30、0:30及6:30,羽化后第1d,交配率较低,羽化后2-4d交配率较高(71.4％ ～76.0％)；成虫交配持续时间从50 min到125 min不等,交配持续时间与蛾龄紧密相关,蛾龄越大交配持续的时间越长,且差异显著；雌、雄蛾一生的交配能力受雌雄比影响显著,当雌雄比为2∶1时,雌、雄蛾交配次数和能力都最强,雄蛾交配次数为8.67,雌蛾接受的精包数为6个.%The mating capability and behavior of the DBM (diamondback moth) were investigated under laboratory conditions. Both males and females were able to mate at the first day after emergence, and males could copulate more than once in their lifetime. Three mating peaks were observed during one day, namely 12 : 30,0 : 30 and 6 : 30. The mating ratio at the first day was low and increased at 2-4 d(71.4% -76%). The duration of mating ranged from 50 to 125 min, which was positively correlated with the age of the DBM. The mating ability of female and male was mainly influenced by sex ratio. The female and male moths mating frequency and capacity were the strongest when the female to male ratio was 2:1, with the mating frequency of male moth being 8.67 and the sperm packet number of female moth received being six.
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