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多年田间系统观察表明 ,柑橘溃疡病的消长 ,在春梢期 ,主要影响因子为气温。 4月下旬平均气温 2 0℃持续 1 0～ 1 5d ,田间始病 ;平均气温 2 5℃连续 3d ,田间进入病情激增期。在夏、秋梢期 ,主要影响因子为湿度和降雨。相对湿度低于 70 % ,不利于发病 ;持续阴雨或短时大雨极有利于流行。溃疡病的药剂防治应掌握在春梢展叶后 7d用药 ,夏、秋梢则萌芽后即用药。药剂品种以可杀得和百菌清最理想 ,喷药次数以 3次为好。
Years of field system observations show that the growth and decline of citrus canker, in the spring shoots, the main impact factor is the temperature. In late April, the average temperature was 20 ℃ for 10 ~ 15 days, and the disease started in the field. The average temperature was 25 ℃ for 3 consecutive days and the field entered the surge period. In summer and autumn, the main influencing factors are humidity and rainfall. Relative humidity less than 70%, is not conducive to the disease; continuous rain or short-term heavy rain is very conducive to popularity. Prevention and treatment of ulcer disease agents should be held in the spring tip of the leaves after 7d medication, summer, autumn tip germination that medication. Pharmacy varieties to kill and chlorothalonil the best, spraying times to 3 times as well.