| 李伯宁;周益林;段霞瑜.小麦白粉病与温度的定量关系研究[J].植物保护,2008,34(3):22-25. |
| 小麦白粉病与温度的定量关系研究 |
| Effects of temperature on wheat powdery mildew |
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| DOI： |
| 中文关键词: 小麦白粉菌 温度 模型 |
| 英文关键词:wheat powdery mildew temperature model |
| 基金项目: |
| 李伯宁;周益林;段霞瑜 |
| 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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| 中文摘要: |
| 温度对小麦白粉病影响试验的结果表明,此病害适宜发生的温度为15～20℃,低于10℃或高于25℃对该病有明显抑制作用。当温度高于26℃时,试验显示随着温度的升高,终止小麦白粉病病程的时间缩短,据此建立了不同温度(x)与相应终止病程的时间(y)的关系模型为y=21 900e-0.303 5x(χ2=1.65<χ20.05,7=14.07)。同时,根据高温区病害的严重度(y)与温度(x)的试验数据,建立了其关系模型为:y=-3.00x+76.60(r2=0.922 1**),由此计算获得了连续10 d(一个病程时间)温度为25.53℃即可终止此病害的病程。该试验结果将为小麦白粉病的越夏区划提供基础数据。 |
| 英文摘要: |
| The effects of temperature on wheat powdery mildew was investigated.The results showed the optimum temperature for occurrence and development of disease was 15～20 ℃,and severity of wheat powdery mildew obviously declined when the temperature was above 25 ℃ or below 10 ℃.When temperature increased above 26 ℃,time of terminating process of wheat powdery mildew decreased.The model of relationship between temperature(x) and time(y) of terminating disease process was established: y= 21 900e-0.303 5x(χ2=1.65<χ20.05,7=14.07).The model of relationship between temperature(x) and disease severity(y) was constructed: y=-3.00x +76.60(r2 = 0.922 1**)during 20~26 ℃,and calculated that the disease process could be terminated at 25.53℃ in the continuous ten days.These results will provide the basic data for the oversummering division of the wheat powdery mildew. |
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