斯氏钝绥螨对西花蓟马和豆大蓟马 若虫的捕食功能反应
The functional predatory response of Amblyseius swirskii to Frankliniella occidentalis and Megalurothrips usitatus nymphs
禹云超；郅军锐；曾 广；岳文波；叶 茂
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DOI：10.7679/j.issn.2095-1353.2019.143
作者单位：贵州大学昆虫研究所，贵州省山地农业病虫害重点实验室，贵阳 550025；贵州大学昆虫研究所，贵州省山地农业病虫害重点实验室，贵阳 550025；贵州大学昆虫研究所，贵州省山地农业病虫害重点实验室，贵阳 550025；贵州大学昆虫研究所，贵州省山地农业病虫害重点实验室，贵阳 550025；贵州大学昆虫研究所，贵州省山地农业病虫害重点实验室，贵阳 550025
中文关键词：斯氏钝绥螨；西花蓟马；豆大蓟马；功能反应；捕食喜好性；干扰作用
英文关键词：Amblyseius swirskii; Frankliniella occidentalis; Megalurothrips usitatus; functional response; predation preference; interference response
中文摘要：
【目的】 为明确斯氏钝绥螨Amblyseius swirskii对西花蓟马Frankliniella occidentalis和豆大蓟马Megalurothrips usitatus不同龄期若虫的捕食量及控制潜能。【方法】 在25 ℃和75%相对湿度下，研究了斯氏钝绥螨雌成螨对两种蓟马1龄和2龄若虫的捕食喜好性、功能反应以及捕食螨自身的干扰反应。【结果】 斯氏钝绥螨无论对西花蓟马还是豆大蓟马，在各自1龄和2龄若虫共存状况下，对1龄若虫的喜好性均显著高于2龄。捕食螨对两种蓟马1龄若虫的捕食量和喜好性无显著差异，但对西花蓟马2龄若虫的捕食量和喜好性显著大于豆大蓟马2龄若虫。斯氏钝绥螨雌成螨对西花蓟马和豆大蓟马的1龄若虫和2龄若虫的捕食功能反应均符合Holling Ⅱ型方程。捕食螨对西花蓟马和豆大蓟马1龄若虫的日均捕食量均随其自身密度的增加而逐渐降低。【结论】 斯氏钝绥螨的捕食量与蓟马的种类和龄期有关，也与捕食螨的密度有关。
英文摘要：[Objectives] To investigate the potential of Amblyseius swirskii to act as a biological control for nymphs of the thrips Frankliniella occidentalis and Megalurothrips usitatus. [Methods] The prey preferences and functional and interference responses of A. swirskii to nymphs of F. occidentalis and M. usitatus were measured at 25℃ and 75% RH under laboratory conditions. [Results] A. swirskii preferred 1st instar nymphs of both F. occidentalis or M. usitatus to 2nd instar nymphs of these species, and there was no difference in its predatory capacity, or preference, for 1st instar nymphs of either species. However, A. swirskii preferred 2nd instar nymphs of F. occidentalis to those of M. usitatus. The functional response was a good fit to the Holling Ⅱ equation. The predation rate of A. swirskii on 1st instar nymphs decreased with predator density. [Conclusion] The predatory capacity of A. swirskii was affected by the species and developmental stage of its prey and predator density.