Fábio Sampaio, Cesar A. Marchioro, Luís A. Foerster
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引用次数: 0
Abstract
The fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), poses a global threat to agriculture, causing significant economic losses in numerous cash crops. Various control methods, including chemical insecticides, have proven insufficient against S. frugiperda, leading to a demand for alternative strategies, such as biological control. In this context, laboratory experiments were conducted to evaluate the parasitism of Trichogramma foersteri (Hymenoptera: Trichogrammatidae) and Telenomus remus (Hymenoptera: Scelionidae) on egg masses of S. frugiperda with one and two layers. Additionally, the potential synergistic use of both species against the fall armyworm were assessed. Although both species parasitized single and double-layered egg masses of S. frugiperda, Te. remus showed higher parasitism compared to T. foersteri. The parasitism of Te. remus was not affected by the competition with T. foersteri. Conversely, an increase in parasitism of T. foersteri was observed due to competition with Te. remus, especially when both species had simultaneous access to S. frugiperda egg masses. The total number of parasitized eggs was significantly higher when Te. remus was allowed to parasitize first, and when both parasitoids had simultaneous access to the egg masses. These results are crucial for the development of biological control programs using T. foersteri and Te. remus, as they indicate that both parasitoids could be used, either individually or in combination, against S. frugiperda.
秋虫(Spodoptera frugiperda,鳞翅目:夜蛾科)对全球农业构成威胁,给许多经济作物造成重大经济损失。事实证明,包括化学杀虫剂在内的各种防治方法都不足以对付鞘翅目蚜虫,因此需要生物防治等替代策略。在这种情况下,我们进行了实验室实验,以评估毛蝽(膜翅目:Trichogramma foersteri)(膜翅目:Trichogrammatidae)和 Telenomus remus(膜翅目:Scelionidae)对单层和双层蚜虫卵块的寄生情况。此外,还评估了这两种害虫对秋季军虫的潜在协同作用。虽然这两种昆虫都寄生在褶曲蚜的单层和双层卵块上,但 Te. remus 的寄生率要高于 T. foersteri。Te. remus 的寄生率不受与 T. foersteri 竞争的影响。相反,由于与 T. foersteri 的竞争,观察到 T. foersteri 的寄生率增加,尤其是当这两个物种同时接触到 S. frugiperda 卵块时。当 Te. remus 首先寄生时,以及当两种寄生虫同时接触卵块时,被寄生卵的总数明显较高。这些结果对于制定使用 T. foersteri 和 Te. remus 的生物防治方案至关重要,因为它们表明这两种寄生虫可以单独或组合使用,以防治 S. frugiperda。
期刊介绍:
The Journal of Applied Entomology publishes original articles on current research in applied entomology, including mites and spiders in terrestrial ecosystems.
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