A push-pull strategy to control aphids combines intercropping with semiochemical releases

文献类型： 外文期刊

第一作者： Hatt, Severin

作者： Hatt, Severin;Zhang, Yong;Chen, Julian;Xu, Qinxuan;Hatt, Severin;Lopes, Thomas;Zhang, Yong;Francis, Frederic;Hatt, Severin;Bodson, Bernard

作者机构：

关键词： Triticum aestivum;Pisum sativum;Association;Methyl salicylate;E-beta-farnesene;Alginate beads;Integrated pest management

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：5.918； 五年影响因子：5.955 ）

ISSN： 1612-4758

年卷期： 2018 年 91 卷 1 期

页码：

收录情况： SCI

摘要： Even if insect pest populations can be reduced by increasing plant diversity through intercropping, natural enemies are not always favored in such systems. Alternatively, semiochemical substances have been tested to enhance biological control, with inconsistent results. Combining both strategies can be an interesting way to maximize pest control. In this work, a 2-year setup involving wheat-pea strip intercropping combined with the release of E-beta-farnesene (EBF) or methyl salicylate (MeSA) was tested as a push-pull strategy to simultaneously repel aphids and attract beneficials. Two types of slow-release formulation (i.e., oil and alginate beads) containing EBF or MeSA were deployed with the intercropping. The abundance of aphids was significantly decreased, while hoverfly larvae and mummified aphids increased on both pea plants and wheat tillers by the release of oil-formulated EBF and MeSA. The proportion parasitism of the aphid-parasitism rate [mummies/(aphids + mummies)] was also increased by treating both crops in both years. Releasing EBF through oil rather than alginate beads proved significantly better for attracting natural enemies and reducing aphids. Aphids were negatively correlated with the density of hoverflies (both adults and larvae) and numbers of mummies. All these results showed that combining intercropping with the release of EBF or MeSA formulated in oil can significantly reduce aphid density and attract their natural enemies. Therefore, the combination of both strategies could help farmers reduce the use of insecticides.

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