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日前,笔者从商洛市植保植检站了解到,玉米灰斑病是该市近年来在玉米上新发生的一种危害性很大的病害。2009年该病首次在该市商州区张村镇发生,现已成为该市玉米的主要病害,一般发生在气候冷凉的山区乡镇,目前全市发生面积增加到20万亩左右。据介绍,8月16~20日,市植保植检站技术人员在商州区、丹凤县、山阳县调查,病害主要危害春播玉米,发病区域平均病田率85%以上,发病较重田块病株率达100%,病叶
Recently, I learned from the plant protection and planting stations in Shangluo City, corn gray spot disease is the city in recent years, a new serious harm to corn disease. The disease took place for the first time in Zhangcun Town, Shangzhou District, in 2009 and has now become the major maize disease in the city. It usually takes place in mountainous and humid towns and townships. At present, the area of the city has increased to about 200,000 mu. According to reports, August 16 to 20, the city plant protection and plant inspection technicians in Shangzhou District, Danfeng County, Sanyang County, the main hazards of spring sowing disease maize, disease incidence rate of more than 85% of the disease field, the incidence of heavier fields Block disease rate of 100% diseased leaves