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对重庆市小麦主要品种灰霉病的调查研究表明,病穗率为34—100%,病情指数为8.5—55%。受病籽粒干瘪霉烂,无食用价值。用大麦、小麦的病穗上和蚕豆病荚上分离得到的菌株,在大麦、小麦、蚕豆苗期和花期、灌浆期分别作了灰霉菌株交互接种观察,确定了病菌的致病性和危害性,并根据病原的培养性状和形态特征,鉴定为灰葡萄孢(Botrytis cinerea Pars ex Fr.)。病原菌之菌丝生长和孢子萌发的最适温度为23—25℃,适温范围20—28℃;最适相对湿度为95—100%。小麦扬花灌浆期中,日平均温度15℃以上,连阴雨开始前的4—5天中,每公顷用托布津或多菌灵750—1125g,或托福合剂1500—2250g喷施,有良好的防病增产效果。
The investigation on the main wheat species of Botrytis cinerea in Chongqing showed that the disease panicle rate was 34-100% and the disease index was 8.5-55%. Sick mildew rotten kernel disease, no food value. The strains isolated from diseased ear of barley and wheat and pod of Vicia faba were used to observe the pathogenicity and the harmfulness of the bacteria in the interaction between the gray mold strains and the seedling stage and the flowering stage of the barley, It was identified as Botrytis cinerea Pars ex Fr. According to the traits and morphological characteristics of the pathogen. Pathogen mycelial growth and spore germination optimum temperature is 23-25 ℃, suitable temperature range 20-28 ℃; optimum relative humidity of 95-100%. In wheat flowering stage, the average daily temperature above 15 ℃, even 4-5 days before the start of the rainy season, with Tuopujin or Carbendazim 750-1125g, or TOFH mixture 1500-2250g sprayed with good disease prevention and yield increase effect.