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在川北山区,盆中及盆西丘陵区春雨少,早玉米播种后往往由于低温缺水,玉米出苗迟缓,为玉米丝黑穗病菌的侵染提供了有利条件。加之,玉米连作多。农家肥堆沤处理不当,土壤、肥料和种子都存在大量的初侵染源,致使这些地区近年玉米丝黑穗病危害有加重的趋势,据绵阳、阿坝、雅安、乐山、成都等地、市、州部分县的调查,一般发病株率为4—11％,严重地块高达30％以上,已引起各地重视。选用抗病品种,结合匀定苗拔除病苗。避免连作、腐熟圈肥、育茁移栽、抡墒催芽播种等
In the mountainous areas of northern Sichuan, there are few spring rains in the hilly areas in the basin and the basin, and early spring maize often provides postmotivation of maize head smut infection due to low temperature and water shortage and delayed maize emergence. In addition, even more corn. Due to the improper handling of manure heap, there are a large number of primary sources of infection in soils, fertilizers and seeds. As a result, the hazards of maize head smut have been aggravating in recent years. According to the statistics of Mianyang, Aba, Ya’an, Leshan and Chengdu, In some counties of the state, the average incidence of strains is 4-11%, and the serious mass is as high as 30% or more, which has drawn great attention from all over the country. Use resistant varieties, combined with uniform vaccine to remove the disease vaccine. Avoid continuous cropping, rotting circle fertilizer, fertility Zhuo transplanting, soil moisture germination sowing