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1960年在关中和陕北部分地块首次发现小麦黄矮病,1964年普遍发生。蒲城、合阳、大荔、澄城、兴平、铜川等县、市为严重病区,发病率重的达90％,平均减产28.68％。嗣后1966年、1970年、1973年、1978年和1980年均大面积成灾,减产损失20—30％,1970年发病面积1000余万亩,损失小麦5亿斤。发病情况研究 1964年以来,我们先后进行了以下几项研究工作: 1.损失量测定以三叶期感染损失最重,减产53.6％;冬前感染的损失次之,减产36.5％;春季感
Wheat yellow dwarf was found for the first time in Guanzhong and parts of northern Shaanxi in 1960, and was widespread in 1964. Pucheng, Heyang, Dali, Chengcheng, Xingping, Tongchuan and other counties, the city is a serious ward, the incidence of heavy up to 90%, an average reduction of 28.68%. Subsequently, 1966, 1970, 1973, 1978 and 1980 all suffered extensive damage. The loss of production was 20-30%. In 1970, the disease area was more than 1,000,000 mu and the loss of 500 million kg of wheat. The incidence of disease research Since 1964, we have carried out the following research work: 1. Determination of the loss of the most important three-leaf stage infection loss, 53.6% reduction; loss of winter infection, followed by a 36.5% reduction; spring sense