| 六种Bt产品杀虫效果比较 |
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| 引用本文： | 张永安,王玉珠,赵同海.六种Bt产品杀虫效果比较[J].中国森林病虫,2001,20(2):12-14. |
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| 作者姓名： | 张永安 王玉珠 赵同海 |
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| 作者单位： | 中国林业科学研究院森林生态环境与保护研究所生物防治研究室, |
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| 摘 要： | 通过对6种苏云金杆菌（Bt）产品在15、20、27℃条件下感染油松毛虫Dendrolimus tabulaeformis试验结果比较，总体结果是Foray48B产品毒力最高，其次是苏州和科瑞森。6种Bt产品平均杀虫效果，20℃比27℃时试虫死亡率下降19.4%，15℃比20℃时试虫死亡率下降32.2%。3种Bt稀释浓度在不同温度条件下均以稀释800倍效果最好，当浓度降低1半时，平均试虫死亡率下降12.3%，当浓度增加1倍时，平均试虫死亡率下降1.6%。在20℃以下时，温度对Bt的杀虫效果影响显著，平均每降低1度，试虫死亡率下降6.4%。低温条件下，增加Bt使用剂量并不能提高杀虫效果。
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| 关 键 词： | 温度 浓度 剂量 苏云金杆菌杀虫剂 药效试验 比较研究 森林害虫 |
| 文章编号： | 1671-0886(2001)02-0012-03 |
| 修稿时间： | 2000年4月10日 |
Comparison among 6 Bacillus thuringiensis products against Dendrolimus tabulaeformis larvae |
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| ZHANG Yong an,et al..Comparison among 6 Bacillus thuringiensis products against Dendrolimus tabulaeformis larvae[J].Forest Pest and Disease,2001,20(2):12-14. |
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| Authors: | ZHANG Yong an |
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| Institution: | ZHANG Yong an,et al. |
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| Abstract: | Compared 6 Bacillus thuringiensis(B.t)products infecting Dendrolimus tabulaeformis （D.t)larvae at 15,20,27℃,the results is as follows:the virulence of B.t Foray48B is the highest among the 6 and the next are Suzhou and Kereisen B.t products. The average mortality of D.t larvae is about 85.0% at 27℃,65.6% at 20℃ and 33.4% at 15℃.The mortality is higher when the titer of B.t products is diluted to 800 times.The average mortality of D.t larvae reduced by 1.6% when the titer doubled.Average mortality of D.t larvae decreased by 12.3％ when the concentration reduced by one-half. |
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| Keywords: | Bacillus thuringiensis temperature concentration Dendrolimus tabulaeformis |
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