Control of aphids on wheat by generalist predators: effects of predator density and the presence of alternative prey
Control of aphids on wheat by generalist predators: effects of predator density and the presence of alternative prey
复制标题
通才捕食者对小麦上蚜虫的控制:捕食者密度和替代猎物存在的影响
DOI:
10.1111/j.1570-7458.2009.00876.x
复制
发表时间:
2009
影响因子:
1.9
通讯作者:
Oelbermann
中科院分区:
文献类型:
--
作者:
Oelbermann
There is evidence for both positive and negative effects of generalist predators on pest populations and the various reasons for these contrasting observations are under debate. We studied the influence of a generalist predator,Pardosa lugubris(Walckenaer) (Araneae: Lycosidae), on an aphid pest species,Rhopalosiphum padi(L.) (Hemiptera: Aphididae; low food quality for the spider), and its host plant wheat,Triticumspec. (Poaceae). We focused on the role of spider density and the availability of alternative prey,Drosophila melanogasterMeigen (Diptera: Drosophilidae; high food quality). The presence of spiders significantly affected plant performance and aphid biomass. Alternative prey and spider density strongly interacted in affecting aphids and plants. High spider density significantly improved plant performance but also at low spider density plants benefited from spiders especially in the presence of alternative prey. The results suggest that generalist arthropod predators may successfully reduce plant damage by herbivores. However, their ability to control prey populations varies with predator nutrition, the control of low‐quality prey being enhanced if alternative higher‐quality prey is available.
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DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
J. Beck;S. Toft
通讯作者:
S. Toft
DOI:
10.5860/choice.31-1507
发表时间:
1993-02
期刊:
--
影响因子:
--
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D. Wise
DOI:
--
发表时间:
2009
期刊:
影响因子:
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作者:
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W. Edgar
DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
W. Edgar
通讯作者:
W. Edgar
影响因子:
2.3
作者:
T. Bilde;S. Toft
通讯作者:
S. Toft