1968年,我们在塔城县郊区发现了向日葵霜霉病,当时发病率仅万分之一。近年来,这种病扩展蔓延较快,1979年已蔓延到塔城地区的所有向日葵种植田,发病率一般为5—57％,重病田块达62.5％。 本病在苏联高加索地区的向日葵种植区严重发生。他们采用早播的办法,基本上抑制了本病的发生。为了减少本病在我区的为害,我们特将本文译出,供参考。 In 1968, we found sunflower downy mildew on the outskirts of Tacheng County, at the time the incidence was only one ten thousandth. In recent years, the spread of this disease has spread rapidly. In 1979, it spread to all sunflower fields in the Tacheng area, with a prevalence of 5-57% and a weight of 62.5%. The disease occurred heavily in sunflower fields in the Caucasus. They use the method of early sowing, basically inhibited the occurrence of this disease. In order to reduce the damage of this disease in our area, we specially translated this article for reference.