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journal1 ›› 2017, Vol. 33 ›› Issue (1): 49-55.DOI: 10.16409/j.cnki.2095-039x.2017.01.008

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The Predation Function Response and Development of Chrysopa pallens Larva on Megalurothrips usitatus and Aphis craccivora

TANG Liangde1, WANG Xiaoshuang1,2, ZHAO Haiyan3, FU Buli1, QIU Haiyan1, LIU Kui1   

  1. 1. Institute of Environment and Plant Protection, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China;
    2. Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province/College of Agriculture, South China Agricultural University, Guangzhou 510642, China;
    3. Hainan Key Laboratory for Control of Plant Diseases and Insect Pests/Institute of Plant Protection, Hainan Academy of Agricultural Sciences, Haikou 571100, China
  • Received:2016-06-06 Online:2017-02-08 Published:2017-01-24

Abstract: To clarify the potential pest control capacity and adaptability of Chrysopa pallens larvae to important leguminous insect pests, Megalurothrips usitatus and Aphis craccivora, the predation function response model was evaluated, and performace of C. pallens on the two insect pests were investigated in the laboratory. The results showed that the predation function response of C. pallens 2nd-instar and 3rd-instar larvae on M. usitatus and A. craccivora could be both fitted with HollingⅡ model. The highest maximum daily predatory capacity was 1250.00 for C. pallens 3rd-instar larvae on M. usitatus nymphs, while the lowest maximum daily predatory capacity was 416.67 for C. pallens 2nd-instar larvae on A. craccivora adults. The searching rate of C. pallens larvae decreased with the increase in prey density and was higher on M. usitatus than that on A. craccivora. The developmental period of immature C. pallens (from 1st-instar larvae to adult) on A. craccivora was 18.01 d, shorter than that on M. usitatus (19.89 d). In contrast, the survival rate on A. craccivora was 96.67%, higher than that on M. usitatus (93.33%). The results indicated that these two leguminous insect pests were suitable for development of C. pallens. These results indicate that the C. pallens is a potential natural enemy for M. usitatus and A. craccivora.

Key words: Chrysopa pallens, Megalurothrips usitatus, Aphis craccivora, function response, development

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