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宁夏麦蚜天敌多样性及种间关系

, PP. 739-746

Keywords: 麦蚜,天敌,多样性,种间关系

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Abstract:

麦蚜是宁夏小麦的主要害虫,为了实现自然天敌对麦蚜的有效控制,采用网捕法和陷阱法等采集手段,通过3年田间调查,共鉴定麦蚜天敌97种,包括寄生性天敌16种和捕食性天敌81种。将麦蚜天敌划分为单食性天敌、寡食性天敌、多食性天敌及杂食性天敌共4类功能团进行分析,结果表明,不同天敌功能团对麦蚜种群的影响存在显著的交互作用;寄生性天敌中蚜茧蜂属的燕麦蚜茧蜂与烟蚜茧蜂是优势种;捕食性天敌种类较为复杂,不同地区麦蚜天敌组成存在显著性差异,复杂的农业景观能够维持更高的天敌多样性。表明在农业生态系统中建立和恢复非作物生境能够明显提高天敌种群数量,进而提高其生物防治作用。

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