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PMS | 湖南农业大学植物保护学院科研团队在TOP期刊发表科研成果:小菜蛾生物防治研究

  • 2026-06-08 17:12:15
PMS | 湖南农业大学植物保护学院科研团队在TOP期刊发表科研成果:小菜蛾生物防治研究

Novel Enterobacter strains applied as entomopathogenic insecticides against Plutella xylostella (Lepidoptera: Plutellidae)文章发表在《Pest Management Science》。本研究从田间甜菜夜蛾幼虫肠道分离出3株新型肠杆菌(S-18S-22S-30),对小菜蛾幼虫具备强效杀虫活性,室内盆栽与田间防控效果均媲美常用化学杀虫剂甲氨基阿维菌素苯甲酸盐,可作为绿色生物杀虫剂替代化学农药,为小菜蛾绿色防控提供全新微生物资源。

研究背景

小菜蛾是全球十字花科蔬菜与油菜的核心害虫,繁殖快、世代重叠、迁移性强,防控难度大。当前生产过度依赖化学杀虫剂,引发小菜蛾抗药性激增、天敌种群消亡、农田生态污染等系列问题。现有生物防治手段如苏云金杆菌、性信息素、寄生蜂等,存在害虫抗性、防效不稳、应用场景受限等缺陷,亟需挖掘新型环保昆虫病原微生物,推动绿色农业发展。

主要研究结果

菌株筛选与鉴定:从甜菜夜蛾中肠分离16株可培养细菌,经形态学、生理生化及16SrRNA测序,筛选出3株高毒力肠杆菌;透射电镜观察显示,菌株细胞壁轮廓清晰,胞内物质分布不均,无鞭毛、荚膜等特殊结构。

室内杀虫活性:3株菌对3龄小菜蛾96hLC₅₀分别为747.92833.54422.02mg/L,超声破碎后杀虫活性大幅提升,LC₅₀降至90.75-141.50mg/L5000mg/L浓度下LT₅₀1.56-1.81天;亚致死剂量可显著抑制幼虫取食与体重增长。

盆栽防控效果:喷施于白萝卜苗后,72h小菜蛾死亡率近100%,防效与甲氨基阿维菌素苯甲酸盐一致,且耐模拟雨水冲刷,蛋白膜助剂未显著提升防效。

田间应用效果:在甘蓝、花椰菜田间,3株菌的虫口减退率、幼虫防控效率与化学药剂无显著差异,可兼治菜青虫,有效降低叶片受害指数,田间应用稳定性良好。

研究结论总结

3株肠杆菌是兼具杀虫与抑生长作用的小菜蛾高效生防菌株,室内杀虫活性优异,田间防效稳定且对标主流化学杀虫剂。该研究填补了肠杆菌用于小菜蛾生物防治的研究空白,既能减少化学农药使用、延缓害虫抗药性,又能保护农田生态,为十字花科蔬菜害虫绿色防控提供了关键技术与菌株支撑,契合现代农业绿色发展核心需求。

原文链接:

https://doi.org/10.1002/ps.70945

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  1. CONNECT:[ UseTime:0.000720s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000804s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000409s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000315s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000577s ]
  6. SELECT * FROM `set` [ RunTime:0.000238s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000586s ]
  8. SELECT * FROM `article` WHERE `id` = 537918 LIMIT 1 [ RunTime:0.000627s ]
  9. UPDATE `article` SET `lasttime` = 1780999227 WHERE `id` = 537918 [ RunTime:0.007548s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.004113s ]
  11. SELECT * FROM `article` WHERE `id` < 537918 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000523s ]
  12. SELECT * FROM `article` WHERE `id` > 537918 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000421s ]
  13. SELECT * FROM `article` WHERE `id` < 537918 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000812s ]
  14. SELECT * FROM `article` WHERE `id` < 537918 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002899s ]
  15. SELECT * FROM `article` WHERE `id` < 537918 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005778s ]
0.165716s