Functional and Numerical response and Mutual interference of Goniozus legneri (Hymenoptera: Bethylidae) against Cydia pomonella (Lepidoptera: Tortricidae): its implications for Biological Control

The functional and numerical response and the mutual interference are key components in the selection of parasitoids for biological control. In this study, functional and numerical responses and mutual interference of Goniozus legneri to different densities of fifth instar Cydia pomonella larvae were studied under laboratory conditions. Logistic regression was used to determine a type II functional response. The attack rate, handling time, the parasitoid searching efficiency and the maximum mortality rate were estimated by fitting the Holling model to the data. The numerical response of the parasitoid did not vary based on the availability of codling moth larvae. The negative value of the interference coefficient (–0.228) in the mutual interference analysis showed an inverse relationship between parasitoid density and per capita searching efficiency. It is concluded that a ratio of parasitoid density equal to C. pomonella density is the most effective ratio when programming release trials. The findings of this study contribute significantly to increasing the knowledge of G. legneri and its potential as a biocontrol agent.

在生物防治中，功能响应与数量响应及其相互干扰是选择寄生蜂的关键要素。本研究在实验室条件下，对Goniozus legneri对第五龄Cydia pomonella幼虫不同密度的功能响应与数量响应以及相互干扰进行了研究。通过逻辑回归确定了一种II型功能响应。通过将Holling模型拟合至数据，估计了攻击率、处理时间、寄生蜂搜索效率和最大死亡率。寄生蜂的数量响应并不随桃小食心虫幼虫的可用性而变化。在相互干扰分析中，干扰系数的负值（-0.228）表明寄生蜂密度与个体搜索效率之间存在负相关关系。结论认为，在规划释放试验时，寄生蜂密度与C. pomonella密度的比值最为有效。本研究结果对于提高对G. legneri及其作为生物防治剂的潜力的认识具有重要意义。