Liu Mingxiu, Wang Mian, Nima Yuzhen, Feng Xiaotian, Li Guangyun, Yang Yi, Li Yaying, Liu Huai
Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.
Institute of Vegetable, Tibet Academy of Agriculture and Animal Husbandry Sciences, Lhasa 850032, China.
Insects. 2023 Jun 16;14(6):561. doi: 10.3390/insects14060561.
The predatory mites (Hughes) and the predatory thrips (Priesner) are known as potential biocontrol agents for the two-spotted spider mite (Koch). These two predator species occur simultaneously on crops in agricultural ecosystems and are proved to be involved in life-stage specific intraguild predation. The intraguild prey may play a role in securing the persistence of the intraguild predators during food shortage periods. To understand the potential of intraguild prey as food source for intraguild predators in the and guild at low densities, the survival, development and reproduction of both predators was determined when fed on heterospecific predators. The choice tests were conducted to determine the preference of the intraguild predator between the intraguild prey and the shared prey. Results showed that 53.3% and 60% juveniles successfully developed when fed on heterospecific predators. Female intraguild predators of both species fed on intraguild prey survived and laid eggs throughout the experiment. In the choice test, both intraguild predator species preferred their extraguild prey . This study suggested that intraguild prey served as an alternative prey for intraguild predators prolonged survival and ensured the reproduction of intraguild predators during food shortage, ultimately decreasing the need for the continual release of the predators.
捕食螨（休斯）和捕食蓟马（普里斯纳）被认为是二斑叶螨（科赫）的潜在生物防治剂。这两种捕食者物种同时出现在农业生态系统的作物上，并被证明参与了特定生命阶段的种内捕食。种内猎物可能在食物短缺时期确保种内捕食者的持续存在方面发挥作用。为了了解在低密度下种内猎物作为种内捕食者食物来源的潜力，在以异种捕食者为食时，测定了两种捕食者的存活、发育和繁殖情况。进行了选择试验，以确定种内捕食者在种内猎物和共享猎物之间的偏好。结果表明，以异种捕食者为食时，53.3%和60%的若虫成功发育。两种物种以种内猎物为食的雌性种内捕食者在整个实验过程中存活并产卵。在选择试验中，两种种内捕食者物种都更喜欢它们的种外猎物。这项研究表明，种内猎物作为种内捕食者的替代猎物，延长了其存活时间，并确保了种内捕食者在食物短缺期间的繁殖，最终减少了持续释放捕食者的必要性。
