Ataide Livia M S, Velazquez-Hernandez Yisell, Reyes-Arauz Isamar, Villamarin Paola, Canon Maria A, Revynthi Alexandra M
Department of Entomology and Nematology, Tropical Research and Education Center, University of Florida, Homestead, FL, USA.
J Econ Entomol. 2025 Apr 26;118(2):780-786. doi: 10.1093/jee/toae265.
Thrips parvispinus (Karny) (Thysanoptera: Thripidae), an invasive thrips species, poses a significant threat to global agriculture due to its polyphagous nature and rapid spread. Its recent arrival in the continental United States raises concerns about potential impacts on ornamental and vegetable crops. Dip treatments might serve as a phytosanitary practice for growers to start with plants free of visible pests. This study aimed to assess the efficacy of dip treatments using 4 biorational and microbial insecticides (mineral oil and Beauveria bassiana-based) in controlling T. parvispinus on bean seedlings. Following gentle agitation of cuttings, artificially infested with 10 second-instar (L2) larvae, for 15 s in each solution, thrips infestation was evaluated at 1, and 24 h postdipping, scoring the numbers of dislodged and dead larvae. Additionally, we tested whether dipping could cause phytotoxicity on bean (Phaseolus vulgaris L.), gardenia (Gardenia jasminoides Ellis), and mandevilla (Mandevilla splendens (Hook.f.) Woodson) cuttings during a 7-day period. Our results demonstrated that dip treatments effectively dislodged and killed T. parvispinus L2 larvae from infested cuttings, with BotaniGard-ES and Suffoil-X exhibiting the highest efficacy and a dislodgment rate of 80%-100%. BotaniGard-ES was the only product causing phytotoxicity on bean seedlings, but not on mandevilla and gardenia. Overall, we demonstrated that dip treatment using biorational insecticides is an additional tool that can be incorporated in the integrated pest management of T. parvispinus. These results hold implications for the broader application in the management of thrips across various plants propagated from cuttings.
西花蓟马（Karny）（缨翅目：蓟马科）是一种入侵性蓟马物种，因其多食性和快速传播对全球农业构成重大威胁。它最近进入美国大陆引发了人们对其对观赏作物和蔬菜作物潜在影响的担忧。浸蘸处理可能是种植者对无可见害虫的植物进行处理的一种植物检疫措施。本研究旨在评估使用4种生物源和微生物杀虫剂（矿物油和球孢白僵菌制剂）浸蘸处理对控制菜豆幼苗上的西花蓟马的效果。将人工接种10只二龄幼虫的插条在每种溶液中轻轻搅拌15秒后，在浸蘸后1小时和24小时评估蓟马侵染情况，对掉落和死亡的幼虫数量进行评分。此外，我们测试了浸蘸处理在7天内是否会对菜豆（Phaseolus vulgaris L.）、栀子（Gardenia jasminoides Ellis）和曼陀罗（Mandevilla splendens (Hook.f.) Woodson）插条造成植物毒性。我们的结果表明，浸蘸处理有效地使侵染插条上的西花蓟马二龄幼虫掉落并死亡，BotaniGard-ES和Suffoil-X表现出最高的效果，掉落率为80%-100%。BotaniGard-ES是唯一对菜豆幼苗造成植物毒性的产品，但对曼陀罗和栀子没有影响。总体而言，我们证明使用生物源杀虫剂的浸蘸处理是一种可纳入西花蓟马综合害虫管理的额外工具。这些结果对于在各种扦插繁殖植物上蓟马管理的更广泛应用具有启示意义。
