The systemic observation in the field for many years showed that temperature was the main factor affecting the dynamics of citrus canker in the stage of spring sprouting.
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。
The control effect of copper oxychloride on citrus canker was studied.
进行了氧氯化铜防治柑桔溃疡病的药效试验。
The typical symptom appeared as approximately circular spot with a yellow halo, without crateriform symptom as that of citrus canker.
病斑近圆形，周围有黄晕，但不象柑桔溃疡病那样有火山口开裂。
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