Zhuang Yutong, Bao Kexin, Wang Xiaoyi
Key Laboratory for Sustainable Forest Ecosystem Management of Ministry of Education, College of Forestry, Northeast Forestry University, Harbin, Heilongjiang, China.
Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China.
J Econ Entomol. 2025 Jun 13;118(3):1320-1327. doi: 10.1093/jee/toaf061.
Dryinus sinicus Olmi (Hymenoptera: Dryinidae) is a key natural enemy of the nymphs of spotted lanternfly, Lycorma delicatula White (Hemiptera: Fulgoridae), a significant pest in agricultural and forest ecosystems. This study investigates the functional response of female D. sinicus to the first-, second-, and third-instar nymphs of L. delicatula, as well as the intraspecific competition within D. sinicus populations. D. sinicus responded to the increasing prey density of L. delicatula nymphs of different instars by consuming more number of prey than prey consumed at lower prey densities and exhibited Holling's type II curvilinear responses. However, search efficiency decreases with increasing prey density. The predation effect of D. sinicus on the first-instar L. delicatula nymphs was the best, the attack rate per handling time (a'/Th) was 14.9712 and an individual female wasp's attack rate (a') was 1.0091, the handling time (Th) to 1 instar L. delicatula nymphs was 0.0674 and the maximum theoretical rate of prey consumed per 24 h (T/Th) was 14.8368. The intensity of the scrambling competition increasing with increases predator density, but the capita prey consumed level and per capital predation efficiency decreased significantly when the predator density ranged from 1 to 5. The results indicate that intraspecific interference occurs when multiple females of D. sinicus prey on L. delicatula in the same area. Overall, this study demonstrates that D. sinicus is an effective biological control agent for L. delicatula, with significant potential for further development in the management of this pest.
中华柄角蚜小蜂（膜翅目：柄角蚜小蜂科）是斑衣蜡蝉若虫的一种关键天敌，斑衣蜡蝉（半翅目：蜡蝉科）是农业和森林生态系统中的一种重要害虫。本研究调查了中华柄角蚜小蜂雌蜂对斑衣蜡蝉一龄、二龄和三龄若虫的功能反应，以及中华柄角蚜小蜂种群内的种内竞争。中华柄角蚜小蜂对不同龄期斑衣蜡蝉若虫猎物密度增加的反应是，与较低猎物密度时相比，消耗的猎物数量更多，并表现出霍林II型曲线反应。然而，搜索效率随着猎物密度的增加而降低。中华柄角蚜小蜂对斑衣蜡蝉一龄若虫的捕食效果最佳，每次处理时间的攻击率（a'/Th）为14.9712，单头雌蜂的攻击率（a'）为1.0091，对斑衣蜡蝉一龄若虫的处理时间（Th）为0.0674，每24小时消耗猎物的最大理论速率（T/Th）为14.8368。争夺竞争强度随着捕食者密度的增加而增加，但当捕食者密度在1至5之间时，单位猎物消耗水平和单位捕食效率显著下降。结果表明，当同一区域有多头中华柄角蚜小蜂雌蜂捕食斑衣蜡蝉时会发生种内干扰。总体而言，本研究表明中华柄角蚜小蜂是斑衣蜡蝉的一种有效生物防治剂，在该害虫的治理方面具有进一步开发的巨大潜力。
