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journal1 ›› 2017, Vol. 33 ›› Issue (2/3): 338-344.DOI: 10.16409/j.cnki.2095-039x.2017.03.007

• RESEARCH REPORTS • Previous Articles     Next Articles

The Predation Efficiency of Lady Beetles on Myzus persicae and Feeding Competition of Harmonia axyridis with Aphidius gifuensis

KE Rui1, XU Jiwei1, XIAO Zhixin2, LI Li2, CHEN Bin1, LI Zhengyue1, GUI Furong1,3   

  1. 1. State Key Laboratory for Conservation and Utilization of Bioresources in Yunnan/College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China;
    2. Baoshan Branch, Yunnan Tobacco Company, Baoshan 678000, China;
    3. Yunnan Plateau Characteristic Agriculture Industry Research Institute, Kunming 650201, China
  • Received:2016-10-31 Online:2017-06-08 Published:2017-04-08

Abstract: Predation efficiency of lady beetles on Myzus persicae Sulzer was tested with four lady beetle species, Coccinella septempunctata Linnaeus, Harmonia axyridis Pallas, Menochilus sexmaculata Fabricius and Propylea japonica Thunberg on M. persicae. Moreover, the feeding competition of two types of predators, H. axyridis and A. gifuensis were tested in laboratory. The four species of lady beetles could complete their whole development on M. persicae, developmental duration was ranked as H. axyridis (17.11 d), C. septempunctata (16.25 d), M. sexmaculata (13.69 d) and P. japonica (12.73 d). The duration of the fourth instars of H. axyridis (4.15 d) was significantly longer than that of other species. The total predation on M. persicae varied significantly between the beetles, which was 687.0, 635.6, 359.2 and 253.2 for H. axyridis, C. septempunctata, M. sexmaculata and P. japonica, respectively. In coexistence of A. gifuensis and H. axyridis, the number of M. persicae attacked by A. gifuensis and H. axyridis decreased with increase in the number of H. axyridis. Parasitism by A. gifuensis decreased with increase of the number of A. gifuensis, but predation by H. axyridis was not affected. The results will provide a theoretical base for rational utilization of two natural enemies for the control of M. persicae.

Key words: Aphidius gifuensis, Harmonia axyridis, predation efficiency, feeding competition

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