配对条件对象虫金小蜂繁殖效率的影响

    The impact of mating conditions on the reproductive efficiency of Anisopteromalus calandrae

    • 摘要: 为深入探讨雌蜂状态及配对条件对象虫金小蜂(Anisopteromalus calandrae)繁殖效率的影响,测定了雌蜂日龄、雌雄比例及配对时间对繁殖效率的影响。结果表明:3日龄雌蜂的子代出蜂量((10.50±1.78)头)、控害率((93.33±1.72)%)及子代雌蜂数((7.60±0.97)头)均达到峰值,而16日龄后雌蜂的繁殖能力显著下降;在雌雄比例为3∶1的处理组中,雌蜂寿命最长,为(17.40±0.55) d,控害率最高,为(82.10±5.14)%,但其子代雌性比(0.54±0.02)低于雌雄比例1∶1处理组(0.75±0.07);当配对时间为1~3 d时,雌蜂产卵天数与子代出蜂数较多,并能维持较高的控害率,而配对时间较长(4~10 d)会导致繁殖能力下降。因此,象虫金小蜂雌蜂的最佳繁殖条件为选择3日龄雌蜂、雌雄比例3∶1及短期配对(1~3 d)。

       

      Abstract: The maize weevil parasitoid, Anisopteromalus calandrae, is a dominant parasitic wasp targeting stored-product Coleoptera pests, and rapid mass-rearing is a key factor influencing its practical application. The physiological state of female and male wasps significantly impacts their rapid reproduction. To gain deeper insights into the effects of female and male wasps conditions on the reproductive efficiency of A. calandrae, this study investigated the impacts of female age, sex ratio (female∶male), and mating duration on parasitoid's reproductive performance. The results showed that 3-day-old females reached peak values in the number of emergence offspring ((10.50±1.78) individuals), pest control rate (93.33±1.72) %, and number of female offspring ((7.60±0.97) individuals), whereas females over 16 days old exhibited a significant decline in reproductive capacity. The treatment group with a 3∶1 (female∶male) sex ratio group had the longest female lifespan (17.40±0.55) d and the highest pest control rate (82.10±5.14)%, but its offspring sex ratio (0.54±0.02) was lower than that of the 1∶1 sex ratio group (0.75±0.07). For mating duration, females paired for 1-3 days had the longest oviposition period and highest offspring emergence wasps while maintaining a relatively high pest control rate. In contrast, prolonged mating duration (4-10 d) led to a significant reduction in reproductive performance. Therefore, the optimal reproductive conditions for A. calandrae females include selecting 3-day-old females, maintaining a 3∶1 (female∶male) sex ratio, and short-term mating (1-3 d). These findings provide key parameters for optimizing the mass-rearing techniques of natural enemies, and further offer important guidance for improving the efficacy of biological control against stored-product pests.

       

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