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Your Position :Home->Past Journals Catalog->2014年51 No.1

Quantitative evaluation of the biological control efficiency of predatory insects based on stable isotope analyses
Author of the article:OUYANG Fang1 , CAO Jing1, 2 GE Feng1**
Author's Workplace:(1. State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; 2. College of Plant Protection, Hunan Agricultural University,Changsha 410128, China)
Key Words: natural enemy insect, biological control, stable carbon isotope, dietary origins
Abstract:

        Predatory insects play important roles in regulating and controlling pest insect populations in the agricultural landscape system. Tracing the diet and movements of natural enemies are basic steps for quantitatively evaluating the effectiveness of these species as biological control agents. Stable isotope analyses can be used to determine insects’ dietary sources and movements. In this study, we first introduce the fundamental principles of stable isotope analyses. We then use this technique to determine the prey origins and proportions of the predatory beetle, Propylea japonica (Thunberg), in an agricultural landscape system comprised of cotton and maize crops. Finally, we discuss the potential and caveats of this method.

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