《环境昆虫学报》

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吴慧敏，白卫辉，邓杰夫，彭李亚，林馥芬，李珉珉，陆永跃，许益镌，文引，李平东，王磊,2024,金龟子绿僵菌CQMa421和球孢白僵菌ZJU435对红火蚁毒力及聚硅氧烷的增效作用研究[J].环境昆虫学报,(2):377-388

金龟子绿僵菌CQMa421和球孢白僵菌ZJU435对红火蚁毒力及聚硅氧烷的增效作用研究

Study on the toxicity of Metarhizium anisopliae CQMa421 and Beauveria bassiana ZJU435 to red imported fire ants Solenopsis invicta and synergistic effects of polysiloxane on the two strains

DOI：

中文关键词: 红火蚁金龟子绿僵菌球孢白僵菌表面活性剂灌巢

英文关键词:Fire ant Metarhizium anisopliae Beauveria bassiana surfactant drench

基金项目:深圳市科技计划（专2021N007）；国家重点研发计划（2021YFD1000500）；广东省农业产业技术体系创新团队项目（2022KJ134）；深圳市农业科技促进中心项目（2022090004zbzjbc）

作者	单位
吴慧敏，白卫辉，邓杰夫，彭李亚，林馥芬，李珉珉，陆永跃，许益镌，文引，李平东，王磊	1. 华南农业大学植物保护学院，广州 510642；2. 深圳市农业科技促进中心，深圳 518057；3. 重庆聚立信生物工程有限公司，重庆 401120

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中文摘要:

为探索红火蚁Solenopsis invicta的生物防治方法，本文系统评估了金龟子绿僵菌Metarhizium anisopliae CQMa421和球孢白僵菌Beauveria bassiana ZJU435对红火蚁的毒力以及聚硅氧烷对其的增效作用，并评估了两株虫生真菌对红火蚁的田间防治效果。结果显示，以处理第10天时的死亡率计算，金龟子绿僵菌CQMa421对红火蚁工蚁的致死中浓度LC50为9.16×106孢子/mL；以8×108孢子/mL的死亡率计算，其对红火蚁工蚁的致死中时LT50为3.534 d。以处理第10天时的死亡率计算，球孢白僵菌ZJU435对红火蚁工蚁的致死中浓度LC50为1.5×105孢子/mL；以1×109孢子/mL的死亡率计算，其对红火蚁工蚁的致死中时LT50为0.218 d。混入0.5 μL/mL及以上浓度的聚硅氧烷可显著提高低浓度金龟子绿僵菌CQMa421及球孢白僵菌ZJU435对红火蚁毒力。田间试验结果显示，混入0.5 μL/mL聚硅氧烷的3.2×107孢子/mL金龟子绿僵菌CQMa421和4×107孢子/mL球孢白僵菌ZJU435对红火蚁的综合防效分别为83.99%和90.44%，低于商品制剂0.1%茚虫威饵剂的综合防效93.89%。研究结果表明，金龟子绿僵菌CQMa421和球孢白僵菌ZJU435对红火蚁具有较高毒力，在红火蚁生物防治中具有较高开发潜力。

英文摘要:

To explore the biological control methods of red imported fire ants Solenopsis invicta, the toxicity of Metarhizium anisopliae CQMa421 and Beauveria bassiana ZJU435 to fire ants were evaluated, the synergistic effects of polysiloxane on the two strains were also tested. The results showed that the LC50 of M. anisopliae CQMa421 to fire ant workers was 9.16×106 spores/mL basing on the mortality of fire ant at the 10th day; the LT50 were 3.534 d basing on the mortality of 8×108 spores/mL. The results showed that the LC50 of B. bassiana ZJU435 to fire ant workers was 1.5×105 spores/mL basing on the mortality of fire ant at the 10th day; the LT50 were 0.218 d basing on the mortality of 1×109 spores/mL. Mixed with concentration of 0.5 μL/mL polysiloxane and above can significantly increase the toxicity of lower concentration M. anisopliae CQMa421 and B. bassiana ZJU435 against fire ants. The field trials results 〖JP2〗showed that the comprehensive control effect of the mixture 0.5 μL/mL polysiloxane and 3.2×107 spores/mL M. anisopliae CQMa421 was 83.99%; and the mixture 0.5 μL/mL polysiloxane and 4×107 spores/mL B. bassiana ZJU435 was 90.44%. The comprehensive control effect of two strains were lower than that of the commercial products 0.1% indoxacarb bait which was 93.89%. Our study showed that M. anisopliae CQMa421 and B. bassiana ZJU435 had high toxicity to the fire ants and had great potential on the biological control of fire ants.

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