Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (17): 118-122.doi: 10.11924/j.issn.1000-6850.casb20191200981

Special Issue: 园艺

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Harmonia axyridis and Coccinella septempunctata: Predation Comparison to Chromaphis juglandicola

Liu Siqi, Wang Qiang, Gao Guizhen()   

  1. College of Forestry and Horticulture, Xinjiang Agricultural University, Urumqi 830052
  • Received:2019-12-22 Revised:2020-01-09 Online:2020-06-15 Published:2020-06-09
  • Contact: Gao Guizhen E-mail:gaoguizhen1984@163.com

Abstract:

Harmonia axyridis and Coccinella septempunctata are important predators of Chromaphis juglandicola. To evaluate the predation ability of H. axyridis and C. septempunctata adults to C. juglandicola, the predation number of H. axyridis and C. septempunctata to C. juglandicola were determined in laboratory. The results showed that the functional responses of H. axyridis and C. septempunctata to C. juglandicola fitted well with the Holling-II equation. The daily maximum predation number of H. axyridis was higher than that of C. septempunctata, which was 490.1961 and 387.5969, respectively. The instantaneous attack rate of H. axyridis was higher than that of C. septempunctata, which was 1.0034 and 0.9218, respectively. The handling time of H. axyridis was shorter than that of C. septempunctata, which was 0.0020 d and 0.0026 d, respectively. The searching efficiency of H. axyridis and C. septempunctata decreased with the increase of prey density, and the searching efficiency of H. axyridis was higher than that of C. septempunctata. The optimal searching density of H. axyridis and C. septempunctata was 149.4104 and 147.9904 pests per predator according to Holling-III model. The results indicate that H. axyridis and C. septempunctata adult are efficient for the control of C.juglandicola, and the predatory capacity of H. axyridis is higher than that of C. septempunctata.

Key words: Harmonia axyridis, Coccinella septempunctata, Chromaphis juglandicola, predation functional response, biological control

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