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一、小麦黄矮病的发生和损失情况小麦黄矮病是我区小麦的主要病害之一,1970年大流行,当年小麦严重减产,灌区有的县减产30～60％。1973年又流行,银北较轻,银南灌区一般发病率达10～20％,重病区达50％以上。固原地区发病最重,一般发病率达50％以上,重病区发病率达90％左右,当年固原山区小麦又大减产。小麦黄矮病对产量损失很大。1971年自治区农科所在宁大一分校农场调查,阿勃小麦病株比健株的千粒重降低38％,穗重损失率为59.6％。1973年银川市郊区农技站在掌政公社掌
First, the occurrence and loss of wheat yellow dwarf disease Wheat yellow dwarf disease is one of the major diseases of wheat in our region, the 1970 pandemic, a serious reduction of wheat that year, some counties in the irrigation area cut 30 to 60%. It became popular again in 1973, while Silver North is lighter. The incidence of Yinnan irrigation area is 10-20% in general and more than 50% in seriously ill areas. The highest incidence of Guyuan area, the general incidence of more than 50%, the incidence of severe ward reached 90%, then the Guyuan mountain area has greatly reduced output. Wheat yellow dwarf disease on the yield loss. In 1971, a survey on the farm of Ning Dai 1, a branch of agricultural sciences in the autonomous region, showed that the wheat yield of Abe wheat decreased 38% and the spike weight loss rate was 59.6% than that of healthy plants. In 1973, Yinchuan suburban agricultural station in the palm of the governing communal palm