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向日葵是内蒙古近几年发展起来的一种重要经济作物,向日葵锈病随之而发生.经两年试验研究,基本明确了五月中下旬和六月中下旬的降水量是影响向日葵锈病流行的主导因素.五月中下旬降水量的多少直接影响冬孢子萌发及担孢子侵入寄主的数量;六月中下旬的降水量则影响锈孢子侵入寄主,形成第一代夏孢子的数量.从而影响病害的流行程度.在降水量正常的年份,七,八月份的降水量相对不很重要.
Sunflower is an important economic crop developed in Inner Mongolia in recent years, sunflower rust followed.After two years of experimental study, it is basically clear that the precipitation in late May and late June is the dominant epidemic of sunflower Factors. The amount of precipitation in mid to late May directly affects the number of teliospores germinating and invading spores; the precipitation in mid-to-late June will affect the number of rust spores invade the host and form the first generation of summer spores, which will affect the disease Prevalence In normal years of precipitation, precipitation in July and August is relatively insignificant.