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小麦条锈菌是一种寄生性、专化性和变异性都很强的病菌,研究表明,小麦条锈菌在我省盆地冬麦区的自然条件下不能越夏,而必须在夏季凉爽的山区度过夏天。经六三和六四两年的调查,已初步查明我省阿坝、甘孜、凉山三自治州和西昌地区的山区,海拔2500公尺左右,七月旬平均气温18℃以下的早播晚熟冬麦区的自生苗上,有大量的越夏条锈菌存在,为盆地冬麦苗期病害的初次侵染提供了菌原。但是这些地区常年均在11月上旬前后开始积雪,当这些地区积雪后,基本上就不再给盆地冬麦区提供或很少提供菌原(西昌地区冬季气温较高,情况可能有别,凉山地区情况与甘孜、阿坝也可能有所不同)。至于盆地冬麦区春季病害流行的规律性则主要有以下几个方面。
Wheat stripe rust is a parasitic, specialization and variability are very strong bacteria, studies have shown that wheat stripe rust in the winter wheat area in our province under the natural conditions can not be more summer, but must be cool in the summer Summer in the mountains. After the surveys in 1993 and 642, early-maturing winter wheat (Triticum aestivum L.), which is about 2,500 meters above sea level in Aba, Ganzi, Liangshan Autonomous Prefecture and Xichang area in our province, has been tentatively identified. There are a large number of P. rust fungi in the area of self-fertile seedlings in the area, which provided the bacteria for the primary infection of winter wheat seedling diseases in the basin. However, these areas begin to accumulate snow around the first ten days of the year in perennial. When the snow in these areas is basically no longer provided or rarely provided to the winter wheat area of the basin (the temperature in winter in Xichang is higher, the situation may be different , The situation in Liangshan and Garze, Aba may also be different). As for the regularity of epidemic of winter wheat in the basin, there are mainly the following aspects.