| 向日葵菌核病菌核及子囊柄萌发峰期的预测 |
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| 引用本文： | 徐利敏,鲁光球.向日葵菌核病菌核及子囊柄萌发峰期的预测[J].中国油料作物学报,1993(3). |
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| 作者姓名： | 徐利敏 鲁光球 |
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| 作者单位： | 内蒙古农科院植保所
(徐利敏)，内蒙古农科院植保所(鲁光球) |
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| 摘 要： | 向日葵菌核病的流行取决于田间菌核量与气候因素的影响。试验研究得知,菌核子囊柄萌发程度在菌核经过一场透雨后与七月底,八月份的降雨量及降雨次数呈正相关,而与此时期的平均温度,降雨间隔期呈负相关。由此建立了预测菌核子囊柄萌发程度的多元回归式为y=65.25—2.58x_1 0.04x_2 2.36x_3-2.10x_4。子囊柄萌发期是进行药剂防治的最有效时期,因此预测子囊柄萌发峰期是防治菌核病的关键。通过多元回归建立预测式为y=76.52-1.38x_1 0.06x_2-1.84x_3-3.86x_4。用上述两式回测前2年的田间实测值其结果与预测值极近。
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| 关 键 词： | 菌核病 菌核 子囊柄 萌发 预测 |
A STUDY ON FORECASTING PEAR GERMINATING STAGE OF ASCOSTEM OF SCLEROTINIA ROT IN SUNFLOWER |
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| Xu Liming Lu Guangqiu.A STUDY ON FORECASTING PEAR GERMINATING STAGE OF ASCOSTEM OF SCLEROTINIA ROT IN SUNFLOWER[J].Chinese Journal of Oil Crop Sciences,1993(3). |
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| Authors: | Xu Liming Lu Guangqiu |
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| Abstract: | The epidemics of sunflower sclerotinia rot was depened on the sclerotia density and weather conditions.The results showed that there was a positive correlation between the germinating level of ascostem of sclerotia and the frequency or amount of rainfall in late July and August,and there was a negative correlcotion between the germinating level and the average temperature or intervals of rainfall.The multiple regression equation for forecasting the germinating level of ascostem was Y=65.25-2.58x1 0.04x2 2.36x3-2.10x4.In addition,the period of germination of ascostem was the most effective date for chemical control on land surface.So forecasting of the germinating peak date of ascostem was very useful for controlling sclerotinia rot. |
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| Keywords: | Sunf loweri Sclerotinia rot Ascostem Germinating peak stage |
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