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油菜萎缩不实病,群众叫做“花而不实”病.这种病,我县近年连续发生,发病面积逐年扩大。一九七六年初发面积约二十亩,一九八一年猛增到七千多亩,一九八二年又扩大到一万六千多亩。发病区域始于郑场公社娄屋、金鱼两个大队,现扩展到全县八个区、二十八个公社。油菜发病后,一般减产百分之三十左右,严重的减产百分之七十至八十,以致影响了我县油菜生产的发展。一、油菜萎缩不实病的症状油菜萎缩不实病,主要发生于甘兰型品种。近两年,我们特地注意了甘兰型油菜萎缩不实病的观察和调查,其主要症状表现是:
Rape atrophy is not real disease, the masses are called “flowers and not real.” The disease, my county occurred in a row in recent years, the incidence of expanding year by year. In early 1976, the area was about 20 mu. It soared to over 7,000 hectares in 1981 and to 16,000 hectares in 1982. The disease area began in Lou commune Lou House, goldfish two brigades, is now extended to eight districts throughout the county, twenty-eight communes. After the onset of rape, the general reduction of about 30 percent, a serious reduction of 70 percent to 80 percent, resulting in the development of rapeseed production in our county. First, the symptoms of rape shrunk disease Rape shrill disease, mainly occurs in the sweet-type varieties. In the past two years, we have paid special attention to the observation and investigation of flattening of Brassica napus. The main symptoms are: