title: Intraguild predation between Amblyseius swirskii and two native Chinese predatory mite species and their development on intraguild prey.
abstract: 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.
authors.affiliation: Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Yingwei
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Jiale
authors.initials: J
authors.lastname: Lv
authors.affiliation: Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Xiaohuan
authors.initials: X
authors.lastname: Jiang
authors.affiliation: Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Boming
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Yulin
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Endong
authors.initials: E
authors.lastname: Wang
authors.affiliation: Lab of Predatory Mites, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Xuenong
authors.initials: X
authors.lastname: Xu
mesh_terms: D000818:Animals; D002681:China; D005260:Female; D006430:Hemiptera / Q000502:physiology*; D007814:Larva / Q000502:physiology; D019083:Mediterranean Region; D008925:Mites / Q000145:classification / Q000502:physiology*; D010063:Ovum / Q000502:physiology; D010572:Pest Control, Biological; D011235:Predatory Behavior / Q000502:physiology*; D013045:Species Specificity