柑桔溃疡病是全国植物检疫对象。为防止其扩展蔓延，科学地进行药剂保护，1995—1996年，我们对田间柑桔溃疡病的消长规律进行了观察。试验材料与方法1．1试验材料选用上圩头村往年经常发病的胡抽园为试验观察点，树龄6年，1990年定植。2．2试验方法春梢展叶后开始调查，逐日查 Citrus canker disease is the national phytosanitary target. In order to prevent its expansion and spread, and to scientifically carry out chemical protection, we observed the growth and decline of citrus canker in the field in 1995-1996. Test Materials and Methods 1.1 Experimental Materials Selection on the village of Xu Village in the past often frequented Hu pumping Park for the experimental observation point, age 6 years, 1990 colonization. 2.2 Test Method After the spring tip leaves began investigation, daily investigation