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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (1): 149-158.DOI: 10.16409/j.cnki.2095-039x.2021.05.006

• RESEARCH REPORTS • Previous Articles     Next Articles

Predation Capacity and Preferences of Orius similis Zheng for Three Aphid Species

DUAN Pan1, WU Daohui1, HU Changxiong1, HE Menglan1, SHEN Zixian1, CHEN Guohua1, YIN Honghui2, XU Tianyang2, YANG Jinbo3, ZHANG Xiaoming1   

  1. 1. State Key Laboratory for Conservation and Utilization of Biological Resources in Yunnan/College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China;
    2. Wenshan Branch of Yunnan Tobacco Company, Wenshan 663000, China;
    3. Yunnan Gerui Biological Technology Co., Ltd., Midu 675602, China
  • Received:2020-12-23 Online:2022-02-08 Published:2021-04-16

Abstract: Orius similis Zheng (Hemiptera:Anthocoridae) is an important predatory natural enemy against tiny pest insects in agro-ecosystems in south China. The predation capacity and preference of O. similis to main aphid species on winter crops in Yunnan province were determined in 5th instar nymphs, male adults, and female adults of O. similis using different mixed aphids groups under laboratory conditions. Three main aphid species Myzus persicae (Hemiptera:Aphididae), Brevicoryne brassicae (Hemiptera:Aphididae) and Acyrthosiphon pisum (Hemiptera:Aphididae) on winter crops in Yunnan province were selected as mixed prey A (hereinafter called MA), M. persicae parasitized by Aphidius gifuensis (Hymenoptera:Aphidiidae) in three different parasitic status were selected as mixed prey B (MB), and young nymphs, old nymphs and adults of M. persicae were used as mixed prey C (MC). The O. similis predated more preys of M. persicae and B. brassicae (MA), mummified aphids and healthy aphids M. persicae (MB), and low-instar nymphs and high-instar nymphs of M. persicae (MC) than those of the other aphids in the same group, showing a positive preference (Ci>0); while showed a negative preference for A. pisum (MA), low-instar parasitic aphids M. persicae (MB) and adults M. persicae (MC) (Ci<0). The total daily predation ranged between 6.71-15.08 and ranked as MA>MC>MB. O. similis had great predation capacity to aphids and can be used to control aphids on winter crops. However, O. similis stands a high risk to predate mummified M. persicae, therefore O. similis should be released after peak formation period of mummified and eclosion of offspring A. gifuensis. Meanwhile, under the coexistence of mixed preys, the total daily predation of O. similis is affected by the complexity of aphid species and types of mixed prey.

Key words: Orius similis, Aphidius gifuensis, Myzus persicae, Acyrthosiphon pisum, Brevicoryne brassicae, mixed prey

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