Identification and Occurrence of the Dominant Parasitic Wasp Therophilus festivus of Larval Grapholita molesta

文献类型： 外文期刊

第一作者： Wang, Xueli

作者： Wang, Xueli;Liu, Qian;Wang, Li;Tu, Hongtao;Zhang, Jinyong;Wang, Xueli;Tu, Hongtao;Wang, Juan

作者机构：

关键词： biological control; fruit borer; Grapholita molesta; natural enemy; parasitic wasp; peach fruits; apple fruits; Therophilus festivus

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2024 年 14 卷 10 期

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收录情况： SCI

摘要： The oriental fruit moth, Grapholita molesta, is one of the most destructive orchard pests worldwide. Due to its behavior of boring into twigs and fruits, controlling the pest at the larval stage using insecticides is challenging. We studied the enemy species at the larval stage of G. molesta from seven fruit-growing areas by sampling peach shoots and fruits bored by its larvae. The occurrence and biological characteristics of the dominant enemy were verified using field investigation and laboratory experiments. The results showed that the dominant enemy species of larval G. molesta was identified as Therophilus festivus. The larval, cocoon, and pupal stages of T. festivus could not survive at 35 degrees C. The developmental durations of these three stages at 20 degrees C were significantly longer than those at 25 degrees C and 28 degrees C. Consecutive years of investigation in Xinxiang, China, indicated that T. festivus can parasitize G. molesta larvae collected at each generation. The parasitism rates in June (45.16%), July (63.50%), and August (48.37%) were significantly higher than those in April (15.27%). Most field research in China has focused on the release of parasitoids to control G. molesta eggs. Our study establishes a foundation for the control of G. molesta larvae using T. festivus.

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