延迟交配对橘小实蝇繁殖适度的影响

橘小实蝇Bactrocera dorsalis Hendel是一种世界性的入侵害虫，严重为害多种经济果蔬。本文通过响应面分析方法，研究了延迟交配对橘小实蝇交配率、产卵量、孵化率和寿命的影响。结果表明，交配率随雌虫交配日龄的延迟先增后减，雌、雄成虫均为35日龄处理组中的交配率最高，为81.00%±2.00%；而雄虫交配日龄的延迟则对其卵孵化率有明显的负面作用，在56日龄雄虫与35日龄雌虫处理组中，其卵孵化率最低，仅为27.56%±4.55%。雌成虫产卵量和寿命受到雌、雄虫双方交配日龄的的影响，产卵量（y）与雄虫日龄（x1）和雌虫日龄（x2）的回归方程为y=514.36+3.08x1-11.05x2，雌成虫寿命（y）与雄虫日龄（x1）和雌虫日龄（x2）的回归方程为y=35.85+0.23x1+0.40x2。研究结果为田间使用性信息素迷向法防治橘小实蝇提供了理论依据。

Effect of delayed mating on reproductive fitness of Bactrocera dorsalis Hendel (Diptera: Tephritidae)

Bactrocera dorsalis Hendel is a worldwide invasive pest which seriously damage a variety of fruits and vegetables with important economic significances. In this paper, response surface analysis was used to study the effects of delayed mating on the mating rate, fecundity, eggs hatching rate and female longevity of B. dorsalis. The mating rate of B. dorsalis increased firstly and then decreased with the delayed of female mating age, the mating rate of 35 days old males and 35 days old females was the highest, which was only 81.00%±2.00%. The delayed of male mating age had a significant negative effect on eggs hatching rates of B. dorsalis, and the eggs hatching rate of 56 days old males and 35 days old females was the lowest, which was only 27.56%±4.55%. The fecundity and longevity of female adults were affected by the mating age of both females and males. The regression equation of fecundity (y) by male age (x1) and female age (x2) was y=514.36+3.08x1-11.05x2. The longevity of female (y) by male age (x1) and female age (x2) was y=35.85+0.23x1+0.40x2. The results provided a theoretical basis for the use of mating disruption to control B. dorsalis in the field.