PDF(Pubmed)
Abstract：
Onion thrips (Thrips tabaci) can pose a significant threat to onion crops, causing leaf damage, reduced bulb size and quality, and yield loss during severe infestations. Conventional insecticide use has been the primary method for managing this pest species, but the efficacy of this approach is inconsistent. Furthermore, emerging pest resistance is a growing concern in some regions. This two-year field study aimed to assess the effectiveness of several pest management strategies in controlling onion thrips populations and limiting their impact on onion yields. The strategies tested consisted of habitat manipulations (including flower strips and straw mulch), biological control agents (Stratiolaelaps scimitus, Neoseiulus cucumeris, Amblyseius swirskii, and Beauveria bassiana), as well as physical barrier control methods (exclusion nets, kaolin, and mineral oil). Habitat manipulation techniques, particularly the use of flower strips, reduced thrips populations by up to 50% and increased onion yields by 25%. In contrast, exclusion nets had a detrimental effect on onion yields, and the other alternative control methods produced results comparable to those obtained for untreated controls. When used alone, biological control agents were not effective at maintaining thrips populations below economically damaging levels. This study offers valuable insights into effective and sustainable pest management practices for the onion industry.
摘要：
洋葱蓟马（Thripstabaci）可能对洋葱作物构成重大威胁，造成叶子损坏，减少灯泡的尺寸和质量，严重侵染期间的产量损失。传统的杀虫剂使用一直是管理这种害虫的主要方法，但是这种方法的功效是不一致的。此外，在一些地区，新兴的抗虫性越来越令人担忧。这项为期两年的实地研究旨在评估几种害虫管理策略在控制洋葱蓟马种群和限制其对洋葱产量的影响方面的有效性。测试的策略包括栖息地操作（包括花条和稻草覆盖物），生物防治剂(Stratiolaelapsscimitus，新黄瓜，漩涡神龙,和白僵菌)，以及物理屏障控制方法(排除网，高岭土,和矿物油）。生境操纵技术，特别是花条的使用，蓟马数量减少了50%，洋葱产量增加了25%。相比之下,排除网对洋葱产量有不利影响，和其他替代对照方法产生的结果与未处理对照获得的结果相当。单独使用时，生物防治剂不能有效地将蓟马种群维持在经济损害水平以下。这项研究为洋葱行业有效和可持续的虫害管理实践提供了宝贵的见解。
