Guo Yingwei, Lv Jiale, Jiang Xiaohuan, Wang Boming, Gao Yulin, Wang Endong, Xu Xuenong
Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Sci Rep. 2016 Mar 14;6:22992. doi: 10.1038/srep22992.
Amblyseius swirskii, native to the east and southeast Mediterranean region, is a successful biological control agent of whiteflies. In this study, we investigated intraguild predations (IGP) between each stage of A. swirskii and each stage of two Phytoseiid species that occur in China, Amblyseius orientalis and Neoseiulus californicus. When there was no whitefly egg provided as the extraguild prey, IGP between A. swirskii and A. orientalis, and between A. swirskii and N. californicus, was observed in 10 and 20 out of 35 combinations, respectively. When IGP was observed, A. swirskii was the intraguild predator in 70% and 65% cases of A. orientalis and N. californicus predation, respectively. These results suggest that A. swirskii is a more aggressive intraguild predator compared to either A. orientalis or N. californicus. When whitefly eggs were provided as the extraguild prey, IGP between A. swirskii and N. californicus decreased greatly, but no significant decrease of IGP was observed between A. swirskii and A. orientalis. Amblyseius swirskii was able to complete development on both heterospecific predatory mites, and both heterospecific predatory mites completed their development on A. swirskii. Possible impacts that A. swirskii may have on local predatory mite populations in China are discussed.
斯氏钝绥螨原产于地中海东部和东南部地区，是一种成功的粉虱生物防治剂。在本研究中，我们调查了斯氏钝绥螨各发育阶段与中国本土的两种植绥螨——东方钝绥螨和加州新小绥螨各发育阶段之间的集团内捕食（IGP）情况。当没有提供粉虱卵作为集团外猎物时，在35种组合中，分别有10种和20种观察到了斯氏钝绥螨与东方钝绥螨之间以及斯氏钝绥螨与加州新小绥螨之间的集团内捕食现象。当观察到集团内捕食时，在捕食东方钝绥螨和加州新小绥螨的情况中，斯氏钝绥螨分别在70%和65%的案例中作为集团内捕食者。这些结果表明，与东方钝绥螨或加州新小绥螨相比，斯氏钝绥螨是一种更具攻击性的集团内捕食者。当提供粉虱卵作为集团外猎物时，斯氏钝绥螨与加州新小绥螨之间的集团内捕食现象大幅减少，但在斯氏钝绥螨与东方钝绥螨之间未观察到集团内捕食现象的显著减少。斯氏钝绥螨能够在两种异种捕食螨上完成发育，并且两种异种捕食螨也能在斯氏钝绥螨上完成发育。本文还讨论了斯氏钝绥螨可能对中国当地捕食螨种群产生的影响。
