球孢白僵菌-大豆共生对大豆生长及大豆蚜发育繁殖的影响
- Title:
- Effects of Beauveria bassiana-Soybean Symbiosis on Soybean Growth and Soybean Aphid Development and Reproduction
- 摘要:
- 为明确球孢白僵菌（Beauveria bassiana）Bb-316菌株定殖大豆（Glycine max）后形成的球孢白僵菌-大豆共生体（简称共生体）对大豆和大豆蚜（Aphis glycines）的影响，使用球孢白僵菌Bb-316分生孢子悬浮液对大豆叶面进行喷施处理，分析其大豆植株内生性及对大豆生长的影响，构建大豆蚜室内实验种群生命表，评估球孢白僵菌内生定殖大豆对大豆蚜生长发育、繁殖和种群参数的影响。结果表明：球孢白僵菌Bb-316菌株叶面喷施后可在大豆的根、茎和叶中均成功定殖，共生体处理组中的大豆植株地下部分生长量明显高于对照组。共生体处理组与对照组之间，大豆蚜成虫的寿命、存活率和繁殖力均存在显著差异，尽管两组间若蚜的历期无显著性差异，但共生体处理组的大豆蚜成虫寿命（3.03 d）比对照组（10.33 d）显著缩短；共生体处理组成蚜的总产蚜量（5.07头）比对照组（21.47头）明显减少；共生体各浓度处理组中大豆蚜的净增殖率(R0)、平均世代周期(T)、周限增殖率(λ)和内禀增长率(rm)均低于对照组。综上表明，球孢白僵菌Bb-316菌株定殖大豆后，能够促进大豆根部生物量的增加，抑制大豆蚜种群的发育和繁殖，为大豆蚜虫的生物防治提供材料基础。
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