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我省一山分四季、十里不同天的立体气候和山地高原、谷坝镶嵌的立体农业,对小麦的周年生长提供了优越的气候条件,从而形成复杂的栽培制度,出现了四季均有麦播、四季均有麦收的生产现状。在此种情况下,营专性寄生的小麦条锈菌便能周年繁衍危害,对小麦生产威胁极大。在轻病年份,发病面积近一百万亩,约占小麦播种总面积的13％,大流行年份,如1981年,发病面积竟达270万亩,占小麦播种面积的40％左右,估计损失产量一亿五千万斤。不仅如此,近些年来,此病年度间的流行频率急剧增高,造成了1979—1981三年的大流行,使现有主要生产品种的抗性基本丧失而失去了利用价值。与省外相比,我省无论气候或栽培方面,均有明显的殊异性,使我省小麦条锈病的
The province has four seasons, ten different days of three-dimensional climate and mountain plateau, valley dam embedded three-dimensional agriculture, the annual growth of wheat provides superior climatic conditions, resulting in a complex cultivation system, there have been four seasons wheat broadcast , Four seasons have received wheat production status quo. Under such circumstances, the specialized parasitic stripe rust bacterium will be able to endanger the annual annihilation and pose a great threat to wheat production. In the mild year, the incidence area is nearly one million mu, accounting for about 13% of the total area planted with wheat. In the year of pandemic, such as 1981, the disease area reached 270 million mu, accounting for about 40% of the sown area of wheat, and the estimated loss Output of 150 million jin. In addition, in recent years, the frequency of epidemics during the year has risen sharply, causing a pandemic in the three years from 1979-1981, thus basically losing the resistance of the existing major production lines and losing the value of their use. Compared with other provinces, our province regardless of climate or cultivation, there are obvious differences, so that our province wheat stripe rust