ABSTRACT A survey of the native parasitoid community was conducted to characterize its possible use as biological control for Asian Chestnut Gall Wasp (ACGW) at two sampling sites in northern Spain. To this end, 500 ACGW galls were collected over five sampling dates between May and July 2017; 250 of them were dissected to estimate the parasitism rates and the remaining 250 galls were placed in emerging rearing boxes to collect adult parasitoids. Seven native parasitoid species belonging to six families (i.e. Eupelmidae, Eurytomidae, Ormyridae, Megastigmidae, Pteromalidae and Torymidae) were identified by morphological traits. All sampled species are considered as native parasitoids of gallers-oaks (Quercus spp.). The most abundant species were Sycophila variegata (Curtis), Torymus auratus (Müller) and Sycophila biguttata (Swederus), representing 70% of the identified parasitoids. In addition, the presence of these native parasitoids was associated with high parasitism rates, especially at the site that was surrounded by oak trees. Our findings highlight the important contribution of native parasitoids to pest regulation throughout the period of ACGW gall development.

中文翻译：

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与坎塔布里亚（西班牙北部）入侵害虫 Dryocosmus kuriphilus（膜翅目：Cynipidae）相关的本地寄生蜂群的特征

摘要 在西班牙北部的两个采样点，对本地寄生蜂群进行了一项调查，以描述其作为亚洲板栗黄蜂 (ACGW) 生物防治的可能用途。为此，在 2017 年 5 月至 7 月之间的五个采样日期收集了 500 个 ACGW 瘿；其中 250 只被解剖以估计寄生率，剩余的 250 只被放置在新兴的饲养箱中以收集成虫。通过形态学特征鉴定了属于六个科（即真翅目、螟科、凤蝶科、巨蝽科、凤蝶科和凤蝶科）的七种本土寄生蜂。所有采样的物种都被认为是 gallers-oaks (Quercus spp.) 的原生寄生物。最丰富的物种是 Sycophila variegata (Curtis)、Torymus auratus (Müller) 和 Sycophila biguttata (Swederus)，占已鉴定寄生蜂的 70%。此外，这些本地寄生蜂的存在与高寄生率有关，尤其是在橡树环绕的地方。我们的发现强调了本地寄生蜂在整个 ACGW 瘿发育过程中对害虫调控的重要贡献。