André C. Cardoso, Ítalo Marcossi, Morgana M. Fonseca, Milena O. Kalile, Leonardo S. Francesco, Angelo Pallini, Thomas V. M. Groot, Arne Janssen
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引用次数: 0
摘要
烟粉虱是全球最具入侵性的害虫之一,对杀虫剂具有很强的抗药性。然而,由于番茄的腺毛释放出对节肢动物有毒的物质,阻碍了天敌的觅食,因此生物防治番茄上的这种害虫往往很困难。因此,天敌对这种作物的适应性是潜在生物控制剂的选择标准之一。我们从野生番茄植株和野外番茄植株中收集了捕食性螨虫,发现了Amblyseius herbicolus和A. tamatavensis两种。已知后者以 B. tabaci 的卵为食,我们研究了 A. herbicolus 以这种猎物为食的发育和繁殖能力,并评估了这两个物种是否都能以 B. tabaci 的爬虫为食并发育。为了验证这些天敌对番茄的适应性,我们评估了它们在番茄植株上的扩散能力,以及它们在以花粉为替代食物的干净番茄植株上的生存能力。最后,我们评估了捕食者是否能有效控制以不同剂量的花粉作为替代食物的番茄植株上的烟青虫。我们发现这两种天敌都以 B. tabaci 幼虫为食并繁殖。在两次种群动态实验中,只有 A. herbicolus 能够控制 B. tabaci。我们的结果表明,A. herbicolus 比 A. tamatavensis 更能适应番茄,因此可能是一种很有前途的番茄生物控制剂。
A predatory mite as potential biological control agent of Bemisia tabaci on tomato plants
Several natural enemies are known as predators of the whitefly Bemisia tabaci, which is one of the most invasive pests worldwide and has developed high resistance to pesticides. However, biological control of this pest on tomato is often difficult because the plant’s glandular trichomes release substances that are toxic to arthropods and hinder the foraging of natural enemies. Therefore, adaptation of natural enemies to this crop is one of the selection criteria for potential biocontrol agents. We collected predatory mites from wild and feral tomato plants and found the species Amblyseius herbicolus and A. tamatavensis. Whereas the latter is known to feed on B. tabaci eggs, we investigated the ability of A. herbicolus to develop and reproduce when feeding on this prey stage, and assessed whether both species can feed and develop on B. tabaci crawlers. To verify the adaptation of these predators to tomato, we assessed their ability to disperse on tomato plants and their establishment on clean tomato plants with pollen as an alternative food. Finally, we evaluated whether the predators were effective in controlling B. tabaci on tomato plants with different pollen dosages as alternative food. We show that both predators fed and reproduced on B. tabaci immatures. A. herbicolus established and dispersed better on tomato plants supplemented with cattail pollen than A. tamatavensis and only A. herbicolus was able to control B. tabaci in two population dynamics experiments. Our results suggest that A. herbicolus is better adapted to tomato than A. tamatavensis and may therefore be a promising biocontrol agent on tomato.
期刊介绍:
Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues.
Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates.
Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management.
Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.