Bottom-up effects of endophytic Beauveria bassiana on multitrophic interactions between the cotton aphid, Aphis gossypii, and its natural enemies in melon
Bottom-up effects of endophytic Beauveria bassiana on multitrophic interactions between the cotton aphid, Aphis gossypii, and its natural enemies in melon
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DOI：
10.1007/s10340-019-01098-5
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发表时间：
2019-06-01
影响因子：
4.8
通讯作者：
Quesada-Moraga, E.
中科院分区：
文献类型：
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作者：
Gonzalez-Mas, N.;Cuenca-Medina, M.;Quesada-Moraga, E.
目前已知昆虫病原真菌具有诱导植物营养成分和/或防御化合物的广泛变化的内生能力。这些变化可能会影响植物和更高营养级之间的相互作用。在这项研究中，我们评估了捕食/寄生效力的幼虫的草蛉，通草蛉，茧蜂寄生蜂，蚜虫colemani，当提供蚜虫已受到挑战的昆虫病原真菌白僵菌。蚜虫要么直接接种真菌悬浮液（仅草蛉生物测定），要么以被B内生定殖的甜瓜植物为食。巴西纳。结果表明，B.施用球孢白僵菌对草蛉取食蚜虫的数量和取食每只蚜虫所需的时间没有显著影响。在选择性的生物测定中，C.幼虫喜食B上的蚜虫。与对照植物相比，Bassiana殖民植物。在另一个选择试验中，用不同浓度的A.蚜虫取食B对colemani氏菌数和性比没有影响。无论是否被巴西亚种占据。我们的研究结果支持的假设，内生昆虫病原真菌可以与其他天敌，如捕食者和寄生虫，在害虫综合治理方案相结合。
Entomopathogenic fungi are now known to have an endophytic capacity that induces a wide range of changes in the composition of plant nutrients and/or defensive compounds. These changes could influence interactions between the plant and higher trophic levels. In this study, we evaluated the predation/parasitism efficacy of larvae of the lacewing, Chrysoperla carnea, and the braconid parasitoid, Aphidius colemani, when offered aphids that had been challenged by the entomopathogenic fungus Beauveria bassiana. Aphids were either inoculated directly with a fungal suspension (lacewing bioassay only) or had been feeding on melon plants endophytically colonized by B. bassiana. Our results indicate that B. bassiana application did not significantly influence the number of aphid prey consumed by lacewings, or the time took them to consume each aphid. In a choice bioassay, C. carnea larvae preferred to feed on aphids reared on B. bassiana-colonized plants compared with control plants. In another choice assay, the number of aphids parasitized by A. colemani and their sex ratio were not influenced by whether the aphids had been feeding on B. bassiana-colonized plants or not. Our findings support the hypothesis that endophytic entomopathogenic fungi can be used in combination with other natural enemies, such as predators and parasitoids, in Integrated Pest Management programmes.