《环境昆虫学报》

作者	单位
袁盛勇，闫鹏飞，孔琼，邓裕亮，张宏瑞* ，刘正喜，何红飞	1. 红河学院生命科学与技术学院，云南蒙自661100 2. 云南农业大学植物保护学院昆明650201 3. 云南省西双版纳出入境检验检疫局，云南景洪666100)

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中文摘要:

测定了蜡蚧轮枝菌Verticillium lecanii MZ041024 菌株对扶桑绵粉蚧Phenacoccus solenopsis Tinsley 的致病性。结果表明蜡蚧轮枝菌MZ041024 菌株对扶桑绵粉蚧1 龄若虫的致病率为83. 72%，致死中浓度LC50 为1. 49 × 105 个/ mL，致死中时间LT50 是5. 21 d; 对2 龄若虫的致病率为74. 42%，致死中浓度LC50 为3. 66 × 103 个/mL，致死中时间LT50 是5. 55 d; 对3 龄若虫的致病率为76. 74%，致死中浓度LC50 为9. 82 × 104 个/mL，致死中时间LT50 是5. 44 d; 其对雌成虫的致病率为85. 37%，致死中浓度LC50 为2. 80 × 104 个/mL，致死中时间LT50 是4. 87 d。说明蜡蚧轮枝菌MZ041024 菌株对扶桑绵粉蚧有较强的致病性。

英文摘要:

The virulence of Verticillium lecanii MZ041024 to 1st，2nd and 3rd larvae and female adult of Phenacoccus solenopsis Tinsley under five different concentrations from 3.0 × 104 to 3.0 × 108 spores /mL was determined. Ｒesults indicated that mortality rate of V. lecanii MZ041024 to 1st larvae was 83.72%，the median lethal concentration (LC50) was 1.49 × 105 spores /mL，and the median lethal time ( LT50) was 5.21 d; the pathogenic rate of isolate MZ041024 to 2nd larvae was 74.42%， LC50 was 3.66 ×103 spores /mL，and LT50 was 5.55 d; the mortality rate of isolate MZ041024 to 3rd larvae was 76.74%，LC50 was 9.82 × 104 spores /mL，and LT50 was 5.44 d; the pathogenic rate of isolate MZ041024 to female adults was 85.37%，LC50 was 2.80 × 104 spores /mL，and LT50 was 4.87 d. So the above data showed that the isolate MZ041024 of V. lecanii had strong virulence to P. solenopsis Tinsley.

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