| Encounters with aphid predators or their residues impede searching and oviposition by the aphid parasitoid Aphidius ervi （Hymenoptera： Aphidiinae） |
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| 作者姓名： | Raki Almohamad Thierrv Hance |
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| 作者单位： | [1]Department of Plant Protection, Faculty of Agriculture-Alfurat University, Deir Ezzor, Syria [2]Earth and Life Institute, Biodiversity Research Center, Universite catholique de Louvain, Croix du Sud 4-5, Louvain-la-Neuve, Belgium |
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| 基金项目： | The first author would like to thank Prof. Frederic Fran- cis, Head of Agricultural Science Department at Gem- bloux Agro-Bio Tech, University of Liege （GxABT-ULg） for facilities to realize behavioral experiments in his lab- oratory. He is also grateful to Prof. Eric Haubruge and Dr. Francois Verheggen Liege （GxABT-ULg） for their advice and facilities concerning the experimental design.Dr. Yves Brostaux Liege （GxABT-ULg） is also acknowl- edged for his help with statistical analysis. This study is the publication BRC300 of the Biodiversity Research Center, Universite Catholique de Louvain）. |
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| 摘 要： | Intraguild predation （IGP） can be an important factor influencing the effective- ness of aphid natural enemies in biological control. In particular, aphid parasitoid foraging could be influenced by the presence of predators. This study investigated the effect of larvae of the predatory hoverfly Episyrphus balteatus DeGeer （Diptera： Syrphidae） and the multicolored Asian ladybird Harmonia axyridis Pallas （Coleoptera： Coccinellidae） on the foraging behavior of the aphid parasitoid, Aphidius ervi Haliday （Hymenoptera： Aphidiidae） in choice experiments using a leaf disc bioassay. Wasp response to chemical tracks left by those predator larvae was also tested. Parasitoid behavior was recorded using the Observer （Noldus Information Technology, version 5.0, Wageningen, the Netherlands）. The experiments were conducted under controlled environmental conditions using leaves of the broad bean plant, Viciafaba L. （Fabaceae） with Myzus persicae Sulzer （Homoptera： Aphididae） as the host complex. A. ervi females avoided aphid patches when larvae of either predator were present. A similar avoidance response was shown by A. ervi to aphid patches with E. balteatus larval tracks, whereas no significant response was observed to tracks left by H. axyridis larvae. It was concluded that IG predator avoidance shown by the aphid parasitoid A. ervi may be a factor affecting their distribution among host patches.
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| 关 键 词： | 蚜虫天敌 寄生蜂 膜翅目 烟蚜 残留物 产卵 搜索 食蚜蝇科 |
Encounters with aphid predators or their residues impede searching and oviposition by the aphid parasitoid Aphidius ervi （Hymenoptera： Aphidiinae） |
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| Authors: | 《Insect Science》 |
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| Institution: | 1. Department of Plant Protection, Faculty of Agriculture‐Alfurat University, , Deir Ezzor, Syria;2. Earth and Life Institute, Biodiversity Research Center, Université catholique de Louvain, Croix du Sud, , 4‐5 Louvain‐la‐Neuve, Belgium |
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| Abstract: | Intraguild predation (IGP) can be an important factor influencing the effectiveness of aphid natural enemies in biological control. In particular, aphid parasitoid foraging could be influenced by the presence of predators. This study investigated the effect of larvae of the predatory hoverfly Episyrphus balteatus DeGeer (Diptera: Syrphidae) and the multicolored Asian ladybird Harmonia axyridis Pallas (Coleoptera: Coccinellidae) on the foraging behavior of the aphid parasitoid, Aphidius ervi Haliday (Hymenoptera: Aphidiidae) in choice experiments using a leaf disc bioassay. Wasp response to chemical tracks left by those predator larvae was also tested. Parasitoid behavior was recorded using the Observer (Noldus Information Technology, version 5.0, Wageningen, the Netherlands). The experiments were conducted under controlled environmental conditions using leaves of the broad bean plant, Vicia faba L. (Fabaceae) with Myzus persicae Sulzer (Homoptera: Aphididae) as the host complex. A. ervi females avoided aphid patches when larvae of either predator were present. A similar avoidance response was shown by A. ervi to aphid patches with E. balteatus larval tracks, whereas no significant response was observed to tracks left by H. axyridis larvae. It was concluded that IG predator avoidance shown by the aphid parasitoid A. ervi may be a factor affecting their distribution among host patches. |
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| Keywords: | aphids Aphidius ervi Episyrphus balteatus foraging behavior Harmoniaaxyridis intraguild predators |
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