| 摘要: |
| 室内毒力测定结果表明,绿僵菌对小菜蛾很高的致死率。Mf2菌株LT50为2.8468,累计僵虫率为36%,对小菜蛾的毒力最强。经时间-剂量-死亡率模型的模拟分析而估计出Mf2菌株作用于小菜蛾的时间与剂量效应参数,测得第四和第五日的LD50分别为6.42×103～3.02×104孢子/ml、2.38×103～1.31×104孢子/ml,侵染的潜伏期为约为4天。在1×107孢子/ml浓度下LT50为2.7天。 |
| 关键词: 绿僵菌 小菜蛾 毒力测定 |
| DOI： |
| 分类号: |
| 基金项目:南昌市科技局农业攻关项目； 国家林业局“948”引进项目（2004-3-30） |
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| Virirulence of Metarhizium anisopliae Against Plutella xylostella |
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Liao fangyan
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| Abstract: |
| Result from toxicological test showed that Metarhizium anisopliae was highly virulent to Plutella xylostella. The LT50 of the strain Mf2 was 2.8468 days and the cumulative mortality was 36%.This strain has a fortissimo virulence against Plutella xylostella. The data were well hitted to time-dose-moritality model. Estimate the parameters of time and dosage effects.Four and five days after inoculation,the LD50 wsa between 6.42×103～3.02×104 conidia/ml and 2.38×103～1.31×104conidia/ml.With a dose of 1×107conidi/ml concentration the LT50 was 2.7days. |
| Key words: Metarhizium anisopliae, Plutella xylostella,virulence. |
