Functional response of a parasitoid Ganaspidium utilis （Hymenoptera： Eucoilidae） on the leafminer Liriomyza trifolii （Diptera： Agromyzidae）

Liriomyzaleafminers 的独居的、幼虫蛹的 endoparasitoid 的功能的反应， Ganaspidium utilis 比尔兹利，在三温度在 Liriomyza trifolii 伯吉斯上被估计(17 ℃， 25 ℃， 29 ℃) 和主人密度。一个类型 II 随机的 parasitoid 方程(RPE ) 被用来估计即时搜索率和处理时间。当温度增加了，即时搜索率增加了。RPE，回归为功能的反应 ofG 获得了的所有。在不同温度的 utilis 是重要的(P 【 0.01 ) 。RPE 回归直线的斜坡越过温度是更低的。在 29 ± 2 ℃，幼虫的最大的数字寄生于是 7.8per 白天。它减少了到 7.2 幼虫在 25 ±寄生于 2 ℃。在 17 ± 2 ℃， parasitization 的重要增长都没由于主人密度增长被观察。估计的处理时间在 17 ±是最低的 2 ℃并且在 25 ±最高 2 ℃分别地。G 的能力。发现并且寄生于的 utilis L。在大量温度上的 trifolii 为 Liriomyza 叶矿工的生物防治使他们成为一个好候选人。

Functional response of a solitary, larval-pupal endoparasitoid of Liriomyza leafminers, Ganaspidium utilis Beardsley, was estimated on Liriomyza trifolii Burgess at three temperatures （17℃, 25℃, 29℃ ） and host densities. A type Ⅱ random parasitoid equation （RPE） was used to estimate instantaneous search rate and handling time. The instantaneous search rate increased as temperature increased. All of the RPE regressions obtained for functional response of G. utilis at different temperatures were significant （P〈0.01）. The slope of RPE regression lines was lower across the temperatures. At 29±2℃, the maximum number of larvae parasitized was 7.8 per day. It decreased to 7.2 larvae parasitized at 25±2℃. At 17±2℃, no significant increment of parasitization was observed due to the host density increments. The estimated handling time was lowest at 17±2℃ and highest at 25 ± 2℃, respectively. The ability of G. utilis to find and parasitize L. trifolii over a wide range of temperatures makes them a good candidate for biological control of Liriomyza leafminers.