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植物病害的发生、流行与气候因素关系至为密切。据笔者长期在四川棉区观测,枯萎病的蔓延危害,受气温、降水、日照、湿度等的影响极其显著。为了防治上的需要,特拟出预测模型如下。长江上游地区6月份棉花初蕾阶段为植株由营养生长转变到生殖生长的关键时期,是整个棉株生育周期中的一个重要转折点。此期的环境状况特别是气候条件适宜与否,
The occurrence of plant diseases, epidemic and climate factors are closely related. According to my long-term observation in the cotton area in Sichuan, the spread of blight damage, by the temperature, precipitation, sunshine, humidity and other effects is extremely significant. In order to control the needs of special prediction model is as follows. The early stage of cotton buds in the upper reaches of the Yangtze River in June was the key period for plant transformation from vegetative growth to reproductive growth and was an important turning point in the whole cotton plant growth cycle. This period of environmental conditions, especially climatic conditions are appropriate or not,