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journal1 ›› 2019, Vol. 35 ›› Issue (3): 382-389.DOI: 10.16409/j.cnki.2095-039x.2019.03.021

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Effects of Temperature on Predatory Functional Responses of Neoseiuius californicus to Eutetranychus orientalis

JIA Jingjing1,2, FU Yueguan2, ZHANG fangping2, LIANG Ming1, CHEN Junyu2   

  1. 1. Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China;
    2. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
  • Received:2018-06-19 Online:2019-06-08 Published:2019-06-17

Abstract: To explore the control potential of Neoseiulus californicus (McGregor) on Eutetranychus orientalis (Klein), an important harmful mite occurring in rubber, the predation N.californicus upon different stages of E. orientalis was investigated at six temperatures, i.e., 21, 24, 27, 30, 33and 36℃. The functional responses of N. californicus to E. orientalis at all the temperatures fitted well with the Holling-Ⅱ equation. At 21-36℃, the daily average predation and predation capability (a/Th) of N. californicus towards E. orientalis adults and eggs peaked at 33℃, while peaked at 30℃ when the preys were E. orientalis nymphs and larvae. The selective coefficient of N. californicus for E. orientalis nymphs, larvae and eggs at 27℃ were 0.62, 1.40 and 1.01, respectively. At a certain prey density, the average predation of N. californicus decreased gradually with the increase in its density, indicating an obvious competition and self-interference in N. californicus. The relationship between predation and predator density was established as the equation E=0.1631P-0.395.

Key words: Neoseiulus californicus, Eutetranychus orientalis, functional response, search effect

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