近年来在我国大部分柑桔栽培区都发现有部分柑桔园有相当部分植株被脚腐病、流胶病、星天牛、褐天牛、绿桔天牛和爆皮虫等不同程度为害 ,尤以部分老果园受害最重 ,造成植株衰弱 ,甚至整株枯死。个别幼龄桔园也有部分植株试花前就造成根颈腐烂甚至环割 ,丧失结果能力 ,失去经济 In recent years, most citrus cultivation areas in our country have found that a considerable part of citrus orchards have been affected by foot rot, melasma, astrotus, sepia, , Especially the heaviest part of the old orchards, resulting in plant weakness, and even the whole plant died. Individual juvenile orange garden also has some plants try to cause the root neck rotten or even ring cutting, loss of result ability, loss of economy