1986—1989年陇东、关中小麦条锈病属轻发生年份。唯1989年秋季关中西部发病中等偏重,故1990年春季关中西部灌区条锈病大流行,东部灌区中度局部偏重流行。说明秋季菌源量多少是翌春条锈病能否流行的基本条件。此外,条中28、29号小种成为优势小种后,主栽小麦品种丧失抗锈性,也是1990年春季出现条锈病严重流行的原因之一。条锈病春季流行是气象和菌源两个基本因素综合怍用的结果,因此,在两者中择其主要矛盾提出监测指标。据我们多年研究结果将小麦条锈病发生的不同阶段的具体监测方法和指标分述如下。 1 越夏阶段条锈病越夏菌源量的大小与小麦秋苗发病程度密切相关,是条锈病系统监测的重要环节。自70年代后期以来,每年于条锈病菌越夏末期的8月中、下旬,在甘肃陇东选定平凉市的白庙,镇原县的平泉、临 1986-1989 Longdong, Guanzhong wheat stripe rust is a mild year. However, in the autumn of 1989, the disease incidence was moderately moderate in central and western China. Therefore, in the spring of 1990, the epidemic of stripe rust in central and western irrigation areas was stricken and the eastern irrigation areas were heavily prevalent. Explain how much bacterial source of autumn is the next spring stripe rust can prevail the basic conditions. In addition, Article 28,29 races become the dominant races, the main varieties of wheat loss of rust resistance, but also the spring of 1990 the emergence of a serious epidemic of stripe rust one of the reasons. The prevalence of stripe rust in spring is the result of a combination of two basic factors, meteorological and bacterial sources. Therefore, the main contradiction between the two is to propose monitoring indicators. According to our many years of research results will be different stages of wheat stripe rust monitoring methods and indicators are described below. 1 over the summer stage of summer rust stripe rust source size of the amount of wheat autumn seedling disease is closely linked to the stripe rust system monitoring an important part. Since the late 1970s, each year in the late summer of late in the summer of August, late August, in Gansu Longdong Pingliang selected White Temple, Zhenyuan County, Pingquan, Pro