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柑桔受冻害后树脂病大量发生,发病程度与植株的受冻程度呈正比,与树势和树龄呈反比,植株立地条件不同发病程度不同.
In the case of citrus, a great deal of resinous disease occurred after frost damage, and the incidence was directly proportional to the degree of frostbite of the plants, inversely proportional to the tree vigor and the age of the plants.