一般认为,日本本来没有柑桔裂皮病,是从国外携入带毒接穗而传入的。 [分布] 几乎所有世界柑桔栽培地区都有发生。日本也一样,根据对农林省及各县试验场保存的各种柑桔调查,明确了柠檬、甜橙、其它引进品种和日本古老品种的带毒情况。现已知道极大多数的柑桔品种包括温州蜜柑的几个品系都有此病。 [病症] 本病在枳、兰卜来檬、枸橼类的树皮上发生特有的龟裂和剥皮,在使用其他柑桔砧木的条件下,即使带毒,也不出现明显症状。枳与带毒接穗进行嫁接时,在砧木部分发现病状,苗木需3～4年,成年 Generally believed that Japan had no citrus split disease, is brought in from abroad with infected scion. [Distribution] Almost all citrus cultivation areas in the world have occurred. In Japan, too, according to surveys on various citrus preserved in the agroforestry provinces and counties’ experimental sites, the poisoning status of lemons, sweet oranges, other imported varieties and ancient Japanese varieties was clarified. It is now known that several strains of the most citrus varieties, including Satsuma, have this condition. [Illnesses] The disease occurs in the bark of the trifoliate orange, rambutan, and citron, with distinct crazing and peeling, and no obvious symptoms are present even with poisonous citrus rootstocks. Trifoliate and poison scion grafting, found in the rootstock disease, seedlings need 3 to 4 years, adult