Influence of beetle banks on cereal, aphid predation in winter wheat
Influence of beetle banks on cereal, aphid predation in winter wheat
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DOI：
10.1016/s0167-8809(01)00340-1
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发表时间：
2002-12-01
影响因子：
6.6
通讯作者：
Chaney, K
中科院分区：
文献类型：
--
作者：
Collins, KL;Boatman, ND;Chaney, K
本试验旨在研究从田间越冬避难所（甲虫库）分散的多食性捕食者是否能减少邻近作物冬小麦中的蚜虫数量。为了评估天敌enidgrating从甲虫银行对麦长管蚜在作物种群的影响，多食性捕食者密度操纵使用排除障碍物放置在设定的距离远离甲虫银行。从陷阱陷阱的数据表明，排除障碍物是有效的显着减少的数量“边界”步甲科，“开放领域”步甲科，隐翅虫科，Linyphiidae和狼蛛在封闭的区域相比，控制区分别为56%，31%，46%，24%和57%。蚜虫数量显着更大的外壳中，在蚜虫高峰期，他们是34%，高于对照区。多食性捕食的影响随着距离的增加而减少，从甲虫银行和多食性捕食者的分布在甲虫银行随着时间的推移而变化。结果进行了讨论的高峰活动期的不同的捕食群体和综合作物管理（ICM）的后果。(C)2002 Elsevier Science B.V.保留所有权利。
An experiment was conducted to investigate whether polyphagous predators dispersing from a within field overwintering refuge ('beetle bank') could reduce cereal aphid numbers in an adjacent crop of winter wheat. To assess the impact of predators enidgrating from the beetle bank on populations of Sitobion avenae in the crop, polyphagous predator densities were manipulated using exclusion barriers placed at set distances away from the beetle bank. Results from the pitfall trap data indicated that the exclusion barriers were effective in significantly reducing the number of 'boundary' Carabidae, 'open-field' Carabidae, Staphylinidae, Linyphiidae and Lycosidae in the enclosed areas compared to the control areas by 56, 31, 46, 24 and 57%, respectively. Aphid numbers were significantly greater in the enclosures, where they were 34% higher compared to the control areas during the aphid peak. The impact of polyphagous predation decreased with increasing distance away from the beetle bank and the distribution of polyphagous predators in relation to the beetle bank varied over time. The results are discussed in terms of the peak activity periods of the different predatory groups and the consequences for integrated crop management (ICM). (C) 2002 Elsevier Science B.V. All rights reserved.