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Junli DU, Degong WU, Qiuwen ZHAN, et al. The Predatory Functional Responses and Searching Efficiency ofHarmonias axyridisonRhopalosiphum maidis[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2018, 33(6): 1024-1029. DOI: 10.12101/j.issn.1004-390X(n).201805016
Citation: Junli DU, Degong WU, Qiuwen ZHAN, et al. The Predatory Functional Responses and Searching Efficiency ofHarmonias axyridisonRhopalosiphum maidis[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2018, 33(6): 1024-1029. DOI: 10.12101/j.issn.1004-390X(n).201805016
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The Predatory Functional Responses and Searching Efficiency ofHarmonias axyridisonRhopalosiphum maidis

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    • Abstract
  • Purpose Our aim was to clarify predation abilities and the predatory functional responses ofHarmonias axyridis.
    Method Each instar larvae and adults ofH. axyridisonRhopalosiphum maidisin the intelligent light incubator in indoor.
    Result There was differences between daily predatory capacity of larvae and adults ofH. axyridis onR. maidis. The 4th instar larvae and female adult ofH. axyridis could preyed on 400, 370.4 aphids respectively. The functional responses of the adults and larvae ofH. axyridis to the density ofR. maidisfitted well with HollingⅡmodel. The searching efficiency decreased with the increase of predator density. Chi square test showed that the theoretical expectation fit the observed values.
    Conclusion The older larvae and adults ofH. axyridis showed strong ability to control corn aphids, and there is interference between ladybugs in preying, the interference effect is positively related to ladybug density.
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