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日灼病是发展柑桔生产的一大障碍。特别是土层浅、质地粘重、灌水条件差的红壤岗地,果实日灼病的发生更为普遍。据1982年调查,我场红壤岗地柑园果实日灼病率高达30％以上,水稻田柑园被害率为7％,严重地影响了柑桔果实的外观、品味和耐藏性。日灼多发生在近成熟的果实上,开始时,在果皮上产生深黄色小斑点,随后病斑扩大,呈黄褐色硬块,稍现下陷,形状大小不一。病斑多发生在果顶近脐部。被害部分,虽仅限于果皮组织,但影响着果实的正常发育,使果皮变
Sunburn is a major stumbling block in the development of citrus. Especially in the shallow soil layer, sticky texture, poor irrigation conditions red soil Kong, fruit sunburn is more common. According to the 1982 survey, the citrus orchards on the field of Hong Kong hilly land had a sunburn rate of over 30% and a rate of 7% on the citrus orchard in the paddy field, which seriously affected the appearance, taste and storage of citrus fruits. Sunburn occurred in the near mature fruit, the beginning, the dark yellow skin on the peel produced spots, followed by enlarged lesion, yellowish brown lumps, slightly subsidence, the shape of different sizes. Lesions occurred in the roof near the umbilical cord. Part of the victim, although limited to the pericarp tissue, but affects the normal fruit development, peel change