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柑桔溃疡病是细菌性病害,属国内植物检疫对象。其发生有逐年加重的趋势,60年代全市发病面积不到500亩,70年代约1500亩,80年代则在3800亩以上,占全市柑桔面积的7.83％,已成为我市柑桔生产的主要病害之一。据我市植保站观察,主要感病品种为柚、甜橙、酸橙类:其次是沅江早熟南桔;温州蜜柑比较抗病:南丰蜜桔和金钱桔则高度抗病。一、病害症状:病菌侵入叶片、新梢和果实后使局部薄壁细胞组织受到破坏而形成病斑,叶片上病斑直径一般为3～4毫米,分散、木栓化隆起,病斑开裂呈火山口状,
Citrus canker disease is a bacterial disease, is a domestic plant quarantine object. The occurrence of the trend of increasing year by year in the 1960s the city less than 500 acres of the disease area, the 70s about 1,500 acres in the 80’s in 3800 acres or more, accounting for 7.83% of the city’s citrus area has become the city’s main citrus production One of the diseases. According to the observation of the plant protection station in our city, the main susceptible varieties are grapefruit, sweet orange and limes: followed by Yuanjiang precocious southern orange; Wenzhou Satsuma relatively resistant: Nanfeng tangerine and golden tangerine are highly resistant. First, the symptoms of the disease: bacteria invade the leaves, shoots and fruits after the local parenchyma cells were damaged and the formation of lesions, leaves on the lesion diameter is generally 3 to 4 mm, scattered, clot lifts, spot cracking was Crater-shaped,