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1978年～1979年试验证明,小麦白秆病主要由种子带菌,种子带茵越高,田间出现的病株越多,土壤和病残体无传病作用。病害主要来自系统性的初侵柒植株,再侵染虽然存在,但只是在近黄熟期才发生,且数量少,传播距离有限,因而对产量的影响不大。鉴于病害的这一特点,药剂拌种即可控制其危害。两年来在湟源、大通、西宁等地试验结果,用种子重量的0.3—0.5％托布津、咪唑44、50％多菌灵等药剂拌种,都能起到防病保产的作用,其防效依次为88—100％,96.2—100％,及91.7—100％,产量分别比对照高29—33.2％,26.7—33％,及7.7—23.3％。此外,根据对病情指数和千粒重关系的分析,求得y=-3.09+0.93655X回归方程,据此可由千粒重、病情指数等指标估计产量的损失。
From 1978 to 1979, it was proved that wheat white stalk disease was mainly carried by seeds, the higher the seed burden was, the more disease strains appeared in the field and no disease was caused by soil and disease residues. The disease mainly came from the systematic initial invasion plants. The re-infection, though existing, occurred only in near-yellow ripening stage with a small number and limited propagation distance, so it had little effect on the yield. In view of this characteristic disease, pharmaceutical dressing can control its harm. Two years in Laiyuan, Chase, Xining and other places test results, with seed weight 0.3-0.5% Topazin, imidazole 44,50% carbendazim and other pharmaceutical dressing, can play a preventive and protective role, its The control effects were 88-100%, 96.2-100%, and 91.7-100%, respectively, and the yields were 29-33.2%, 26.7-33% and 7.7-23.3% higher than the control respectively. In addition, based on the analysis of the relationship between disease index and 1000-grain weight, the regression equation of y = -3.09 + 0.93655X was obtained, and the yield loss could be estimated by 1000-grain weight and disease index.