Li Jun, Jiang Lu, Zhang Yanwu, Guo Qiang, Han Shichou
Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, Guangdong Province, P. R. China.
Shenzhen Wild Animal and Plant Protection Administration Agent, Shenzhen, Guangdong Province, P. R. China.
J Econ Entomol. 2018 Apr 2;111(2):817-822. doi: 10.1093/jee/toy028.
Solenopsis invicta (Buren; Hymenoptera: Formicidae) is a species that has invaded China in recent years. Currently, S. invicta is mainly controlled by chemical treatment, though long-term use of chemical pesticides can cause serious environmental pollution. In this study, a microbial insecticide formulated for the control of S. invicta was screened for laboratory toxicity and field efficacy. The co-toxicity coefficients (CTCs) of the combination of Beauveria bassiana and thiacloprid at various mass ratios were 356.53, 251.20, 182.50, 215.03, and 143.19. When B. bassiana powder and thiacloprid were mixed at a mass ratio of 8:2, the CTC was 356.53, demonstrating a very significant synergistic effect. According to a field efficacy test, at 3 d after treatment, the efficacy of mound injection was significantly better than that of mound drenching. In this study, the insecticidal activity of pathogenic microorganisms against S. invicta was markedly enhanced by using a self-designed apparatus for mound injection of the tested preparation of a complex containing a pathogenic microbe. The results show that S. invicta can be sustainably controlled while ensuring the safety of the environment. The findings are a good reference for the promotion and application of safe control of S. invicta in the future.
红火蚁（Buren；膜翅目：蚁科）是近年来入侵中国的一种物种。目前，红火蚁主要通过化学防治进行控制，不过长期使用化学农药会造成严重的环境污染。在本研究中，对一种用于防治红火蚁的微生物杀虫剂进行了实验室毒性和田间药效筛选。球孢白僵菌与噻虫啉在不同质量比下组合的共毒系数（CTCs）分别为356.53、251.20、182.50、215.03和143.19。当球孢白僵菌粉剂与噻虫啉按质量比8:2混合时，共毒系数为356.53，显示出极显著的增效作用。根据田间药效试验，处理后3天，灌巢的防治效果显著优于淋巢。在本研究中，通过自行设计的用于灌巢含有病原微生物的测试制剂的装置，病原微生物对红火蚁的杀虫活性显著增强。结果表明，在确保环境安全的同时，可以可持续地控制红火蚁。这些发现为未来推广和应用红火蚁的安全防治提供了很好的参考。
