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轮纹烂果病在广大果区近两年来发生较为严重,据调查发病率一般为20％～40％左右。严重的果园发生在70％左右。轮纹病的防治关键是要掌握它的发病规律,对症准确用药。 轮纹病一般发生在4～6月份。病原菌在5月上、中旬,当气温达到15℃以上,遇到降雨时即开始散发孢子,病菌孢子主要通过风雨飞溅传播,传染距离一般10米左右,大部分集中在1米以内。苹果落花后7～10天左右幼果即可受侵染,幼果茸毛脱落期出现侵染是第一高峰。第二高峰侵染在6月中下旬,此时果实处在迅
Rotten rot pattern rot disease in the majority of fruit areas in the past two years more serious, according to the survey incidence is generally 20% to 40%. Serious orchards occur in about 70%. The key to the prevention and treatment of rotavirus is to grasp the regularity of its onset and correct the symptomatic treatment. Ringworm usually occurs in April ~ June. Pathogen in May, mid, when the temperature reached above 15 ℃, in the event of rain began to spore spores, spores mainly spread by wind and rain splashes, the general transmission distance of about 10 meters, most of them concentrated within 1 meter. 7 ~ 10 days after falling apples young fruit can be affected by infection, young fruit hair shedding infection is the first peak. The second peak of infection in late June, when the fruit is fast