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据科研、测报部门多年的研究和观测,平凉地区小麦条锈病的发生流行有以下特点:(1)条锈菌主要在自生麦苗和晚熟冬春小麦上越夏,越夏数量与7月中旬至8月下旬五旬气温之和呈负相关,气温越高、越夏菌量越少,若五旬气温之和超过100℃,锈菌则难以越夏;(2)当秋播冬麦出苗后,条锈菌即行侵染,经增殖、扩散传播到陕西等其他冬麦区;(3)小麦条锈菌在本区域可以越冬,越冬数量取决于冬前菌量和冬季降雪情况。如果秋苗发病严重,冬季降雪早、积雪时间长,越冬菌量就多;反之,越冬菌量就少;(4)春季条
According to many years’ research and observation by scientific research and forecasting departments, the prevalence of stripe rust in wheat in Pingliang has the following characteristics: (1) Stripe rust is mainly found in the summer and summer in self-generating wheat and late-maturing winter and spring wheat; The sum of the temperature at the end of the fifth month and the end of the month was negatively correlated. The higher the temperature, the less the amount of larvae. If the temperature of the Pentecost exceeds 100 ° C, it is hard for the rust to cross the summer. (2) Stripe rust that line infection, proliferation, spread spread to Shaanxi and other winter wheat area; (3) wheat stripe rust overwintering in this region, the number depends on the amount of wintering winter and winter snowfall. If the autumn seedlings severely ill, early winter snowfall, snow for a long time, the amount of more winter; on the contrary, overwintering bacteria less; (4) spring