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油菜病毒病,常造成油菜明脉、花叶、枯斑或矮化症状。此病在我县甘蓝型、白菜型油菜区均有发生,流行年发病15—20%,严重田块高达50%以上,直接影响油菜生产的发展。为此,我们进行多年的试验研究,取得了成果。一、流行规律播种期与发病关系密切据用日油3号品种试验:8月1日播种的,苗期发病株率44.44%;8月11日播种,发病10.34%;8月21日播种,发病4.69%;8月31日
Rape virus disease, often caused by rape Mingmai, mosaic, dead spot or dwarf symptoms. The disease in my county cabbage type, cabbage rape area have occurred, the prevalence of 15-20% incidence, severe field up to 50% or more, a direct impact on the development of rapeseed production. To this end, we conducted many years of experimental research and achieved results. First, the prevalence of sowing and disease closely related to the disease According to the test with Dayou 3 varieties: August 1 sowing, seedling incidence of 44.44%; August 11 sowing, the incidence of 10 34%; August 21 sowing, The incidence of 4.69%; August 31