空间和猎物密度对异色瓢虫取食 柑橘木虱的影响
Effect of spatial scale and prey density on predation of the adult Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Liviidae) by adult Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae)
黄振东1** 周新苗2 蒲占湑1 胡秀荣1 杜丹超1 陈国庆1 张宏宇2
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DOI：10.7679/j.issn.2095-1353.2019.010
作者单位：1. 浙江省柑桔研究所，台州 318020；2. 华中农业大学，武汉 430070
中文关键词：异色瓢虫；柑橘木虱；空间大小；密度；捕食行为
英文关键词： Harmonia axyridis (Pallas); Diaphorina citri; spacial size; prey density; predatory behavior
中文摘要：
【目的】 捕食功能与捕食行为发生的空间及猎物密度存在相关性，通过对异色瓢虫Harmonia axyridis (Pallas)在室内不同空间大小和柑橘木虱Diaphorina citri密度不同条件下的影响程度研究，可以为田间应用提供参考。【方法】 分别设计不同的捕猎空间，研究捕食量和空间大小的相关性，采用高、低密度梯度下研究异色瓢虫对柑橘木虱的取食功能反应，以及在捕食笼中设置不同的猎物密度，统计日捕食头数。【结果】 空间大小（x）与日捕食量（y）呈线性负相关，结果拟合y =﹣28.375x + 130.08线性方程，不同密度梯度设置得到的HollingⅡ型功能反应曲线参数显示，高密度下异色瓢虫捕食柑橘木虱更快、更容易，异色瓢虫在不同柑橘木虱密度下持续捕食结果表明，起始密度高低影响第一天的捕食量，对随后的日捕食量影响不大。【结论】 空间尺寸和猎物密度明显影响异色瓢虫成虫对柑橘木虱的捕食行为。
英文摘要：[Objectives] To provide a reference on the effect of spatial scale and prey density
on the effectiveness of adult Harmonia
axyridis ( Pallas) as a biological control for adult Diaphorina citri. [Methods] We investigated the effect of spatial
scale on predation by measuring predation in different sized enclosures, and
quantified the effect of prey density on the functional response of adult H. axyridis preying on adult D. citri. [Results] A negative, linear
relationship between enclosure size (x)
and daily prey consumption (y) could
be described by the equation y =
-28.375x + 130.08. The HollingⅡ functional response curve indicated that the predation rate increased
with prey density. Initial prey density strongly affected the number of prey
consumed on the first day, but had only a slight effect on subsequently daily
consumption. [Conclusion] Spatial scale and prey density
significantly affect the predation rate of adult H. axyridis on adult D. citri.