| 对张北小菜蛾高毒力白僵菌株的筛选 |
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| 引用本文： | 张立红,李瑞军,陆秀君,张永军,董建臻,杨向东,陶晡.对张北小菜蛾高毒力白僵菌株的筛选[J].植物保护,2009,35(1):121-123. |
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| 作者姓名： | 张立红 李瑞军 陆秀君 张永军 董建臻 杨向东 陶晡 |
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| 作者单位： | 1. 河北农业大学植物保护学院,河北省农作物病虫害生物防治工程技术研究中心,保定,071001
2. 中国农业科学院植物保护研究所,植物病虫害生物学国家重点实验室,北京,100193 |
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| 基金项目： | 河北农业大学博士启动基金，河北农业大学科学发展基金，河北省科学技术研究与发展计划项目，农业部张北农业资源与生态环境重点野外科学观测实验站研究与推广基金 |
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| 摘 要： | 小菜蛾是河北坝上错季蔬菜生产区最重要的害虫，为了探索对其无公害治理方法，以张北的小菜蛾为试虫, 测定了33株球孢白僵菌对其幼虫的僵虫率，从中筛选出5株对小菜蛾2龄幼虫有较高致病力的菌株；从致死中浓度(LC50)和致死中时(LT50)的测定结果分析，BD B026菌株的毒力最高，其处理后7d的LC50为0.47×105个/mL孢子，含1.0×108个/mL孢子菌液的LT50为(1.57±0.027)d，对小菜蛾表现出较强的致病力，具有一定的开发前景。
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| 关 键 词： | 球孢白僵菌 小菜蛾 生物测定 |
Screening of highly virulent Beauveria bassiana isolates against Plutella xylostella in Zhangbei |
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| Zhang Lihong,Li Ruijun,Lu Xiujun,Zhang Yongjiun,Dong Jiangzhen,Yang Xiangdong,Tao Bu.Screening of highly virulent Beauveria bassiana isolates against Plutella xylostella in Zhangbei[J].Plant Protection,2009,35(1):121-123. |
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| Authors: | Zhang Lihong Li Ruijun Lu Xiujun Zhang Yongjiun Dong Jiangzhen Yang Xiangdong Tao Bu |
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| Institution: | 1. College of Plant Protection, Hebei Agricultural University, Baoding071001, China; 2. Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing100193, China |
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| Abstract: | The diamondback moth, Plutella xylostella, is a serious pest in vegetable fields in Zhangbei. Bio efficacy of Beauveria bassiana, an entomopathogenic fungus, was evaluated against the 2nd larvae of this pest in the laboratory. The virulence and efficacy rate of 33 isolates were compared with each other, and 5 isolates were obtained. The results showed that BD026 is the best among these isolates. The LC50 (7 days) was 0.47×105 spores/mL and the LT50 (1.0×108 spores/mL) was (1.57±0.027) days. This results indicated that BD026 might be a good bio pesticide in practice in the future. |
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| Keywords: | Beauveria bassiana Plutella xylostella bioassay |
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