Amorós-Jiménez Rocco, Plaza María, Montserrat Marta, Marcos-García M Ángeles, Fereres Alberto
BioNostrum Pest Control S.L., C/Martillo 40A San Vicente del Raspeig, 03690 Alicante, Spain.
Instituto de Ciencias Agrarias (ICA-CSIC), C/Serrano 115 dpdo., 28006 Madrid, Spain.
Insects. 2020 Mar 5;11(3):166. doi: 10.3390/insects11030166.
Photoselective nets have proven to be effective for aphid pest control as they limit their dispersal ability. However, little is known on the impact of such nets on natural enemies of aphids. In this work, we study the effect of UV-absorbing nets on the syrphid fly Wiedemann (Diptera: Syrphidae), a commercially available aphid biocontrol agent in Mediterranean horticultural crops. First, we released mature syrphid adults and evaluated density and dispersal of the resulting immatures in a turnip crop grown under either UV-blocking (Bionet) or standard net. Second, we assessed, under controlled conditions, the impact of UV radiation on fitness-related parameters, and on flight behavior of adults. Results showed that, while syprhid immature density was higher, their dispersion was reduced under Bionet. UV-absorbing nets are known to influence the dispersion pattern of aphids, which may have indirectly conditioned the distribution of their predator . On the other hand, the type of net had no influence on the performance of adults. We conclude that the use of photoselective nets and the release of syrphid predators such are compatible strategies to be used in IPM aphid-control programs.
光选择性防虫网已被证明对蚜虫防治有效，因为它们限制了蚜虫的扩散能力。然而，对于这种防虫网对蚜虫天敌的影响却知之甚少。在这项研究中，我们研究了紫外线吸收网对地中海园艺作物中一种可商业化利用的蚜虫生物防治剂——食蚜蝇Wiedemann（双翅目：食蚜蝇科）的影响。首先，我们释放了成熟的食蚜蝇成虫，并评估了在种植于紫外线阻隔网（生物网）或标准网下的芜菁作物中所产生的未成熟个体的密度和扩散情况。其次，我们在可控条件下评估了紫外线辐射对与适合度相关参数以及成虫飞行行为的影响。结果表明，虽然在生物网下食蚜蝇未成熟个体的密度较高，但其扩散却减少了。已知紫外线吸收网会影响蚜虫的扩散模式，这可能间接影响了其捕食者的分布。另一方面，防虫网的类型对成虫的表现没有影响。我们得出结论，在综合虫害管理的蚜虫防治计划中，使用光选择性防虫网和释放食蚜蝇捕食者是可兼容的策略。
