Influence of intraguild predation between Episyrphus balteatus and Hippodamia variegata on their prey
Influence of intraguild predation between Episyrphus balteatus and Hippodamia variegata on their prey
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DOI：
10.1080/03235408.2013.804249
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发表时间：
2014-01-02
影响因子：
1
通讯作者：
Gharali, Babak
中科院分区：
文献类型：
--
作者：
Ajvad, Faeze Tavoosi;Madadi, Hossein;Gharali, Babak
团内捕食是天敌群落中经常发生的一种相互作用，尤其是食蚜性天敌。本研究对斑食蚜蝇EpisyrphusbalteatusDeGeer（双翅目：食蚜蝇科）与异瓢虫HippodamiavariegataGoeze（鞘翅目：瓢虫科）之间的IGP强度进行了研究。五种捕食组合，包括二龄和三龄幼虫。variegata和E. Balteatus加对照处理（共6个处理）。在实验室微生态系统条件下，研究了诱导生长素（IGP）对甜椒棉蚜（Aphis gossypii格洛弗）种群密度的影响。在大多数组合中，E. balteatus单独降低了A.棉蚜种群比瓢虫幼虫及其组合更有效。此外，三龄间的IGP也较低。balteatus和二龄幼虫; variegata是不对称的; 3龄E. balteatus。结果表明，IGP互作效应对棉蚜密度的影响为非加性效应。
Intraguild predation (IGP) is an interaction that frequently occurs in natural enemy communities, especially aphidophagous predators. This research investigated IGP intensity between Episyrphus balteatus De Geer (Diptera: Syrphidae), with Hippodamia variegata Goeze (Coleoptera: Coccinellidae). Five predator combinations including second and third larvae of H. variegata and third instar larvae of E. balteatus plus control treatment (totally six treatments) were tested. The effect of IGP on cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae) population density was investigated on sweet pepper seedlings under laboratory microcosms. In most combinations, the third instar larvae of E. balteatus alone reduced an A. gossypii population more efficiently than ladybird larvae and their combinations. Furthermore, IGP between third instar of E. balteatus and second larvae of H. variegata was asymmetrical; second instar H. variegata larvae were always the intraguild prey for third instar E. balteatus. The obtained result showed that outcome of IGP interaction on cotton aphid density was non-additive.