| 白海涛，王伟，魏希杰，韩日畴，徐成体,2020,昆虫病原线虫对草原毛虫幼虫的致病力[J].环境昆虫学报,(5):1269-1274 |
| 昆虫病原线虫对草原毛虫幼虫的致病力 |
| Pathogenicity of entomopathogenic nematodes against Gynaephora alpherakii larvae by bioassay |
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| DOI： |
| 中文关键词: 昆虫病原线虫 草原毛虫 致病力 侵染时间 生物防治 |
| 英文关键词:Biological control entomopathogenic nematodes Gynaephora alpherakii infection time pathogenicity |
| 基金项目:青海省科技厅重点实验室发展专项（2017-ZJ-Y12） |
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| 中文摘要: |
| 草原毛虫Gynaephora alpherakii是青藏高原草原的主要害虫。国家明令禁止使用化学药剂防控这一害虫。因此，有必要以生物农药控制这种害虫。本试验室内测定5种昆虫病原线虫（Steinernema longicaudum X-7，S. carpocapsae All，S. feltiae SN，Heterorhabditis bacteriophora H06和H. indica LN2）对草原毛虫的致病力。结果表明，S. carpocapsae All、S. feltiae SN两种线虫对草原毛虫的侵染效果较好。适宜S. carpocapsae All、S. feltiae SN线虫的侵染活动的环境温度为25℃；低温环境下两种线虫随着剂量的提高，对草原毛虫的致病力均有着显著地增长（P<0.05），且S. feltiae SN线虫的活性高于S. carpocapsae All线虫。因此，昆虫病原线虫S. feltiae SN品系具有效防治青藏高原高寒草地草原毛虫的应用潜力。 |
| 英文摘要: |
| Gynaephora alpherakii is a main pest that causes damages to meadow in Tibet Plateau. Use of chemical insecticides is prohibited by the governmental law. Therefore, it’s necessary to use bio-insecticides to control this pest. The pathogenicity of five entomopathogenic nematode strains to G. alpherakii larvae was determined by indoor bioassay. The results showed that Steinernema carpocapsae All and S. feltiae SN had better effects on G. alpherakii. The environment temperature suitable for S. carpocapsae All and S. feltiae SN nematodes is 25℃. Increase of dose significantly increase the pathogenicity of the two nematodes against G. alpherakii, and the pathogenicity of S. feltiae SN nematodes was higher than that of S. carpocapsae All. The present results showed the potential of using S. feltiae SN to control G. alpherakii in the alpine grasslands of the Qinghai-Tibet Plateau. |
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