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1.柑桔潰瘍病在福州自4月上旬至11月上旬均可发生,而以5、6、7月为发病高峯。 2.旬平均温度16.6—30.6℃,相对湿度68—91.4％都适于发病,而以旬平均温度22.2—30.6℃,相对湿度70.9—91.4％发病較高。 3.雪柑和晚生橙新梢在接近成长时开始发病,刚停止伸长、叶尚浅綠或开始革质化时发病率最高,至老熟时则抗病。果实横径1—1.5厘米(落花后約20天)开始发病,横径2.4—3.4厘米时(落花后60—80天)发病率最高,停止长大、果色转黄后抗病。 4.噴药保护新梢,应掌握新梢在成长达2/3至刚达成长的期間:春梢約在萌芽后40—50天;夏梢約在萌芽后20—40天;秋梢約在萌芽后30—60天。噴药保护果实,可在全部落花后10天开始,在幼果形成后50—70天更应注意保护。
1. Citrus canker disease in Fuzhou since early April to early November can occur, but in May, June and July as the peak incidence. 2. Ten day average temperature 16.6-30.6 ℃, relative humidity of 68-91.4% are suitable for the incidence, while the average temperature of 22.2-30.6 ℃, relative humidity 70.9-91.4% higher incidence. 3. Citrus and late orange shoots began to grow close to growth, just stop elongation, leaves are still light green or the highest incidence of leathery, to mature when the disease resistance. Fruit diameter 1-1.5 cm (about 20 days after falling) onset, the diameter of 2.4-3.4 cm (60-80 days after falling) the highest incidence, stop growing, turning yellow after the fruit disease resistance. 4. Spray to protect the shoots, shoots should be up to the growth of up to 2/3 to just reached the period of growth: spring shoots about 40-50 days after germination; summer shoot about 20-40 days after germination; 30-60 days after germination. Spraying fruit protection, can be 10 days after the beginning of all the fall, 50-70 days after the formation of young fruit should pay more attention to protection.