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广东的潮汕区、新会县、番禺縣、广州市郊,福建的龍溪縣、福州市郊,和广西的柳城、融縣、兴業縣、郁林縣的柑桔类,都發生一种毁滅性的病害称为黄梢,或黄龍病。病区各种柑桔类的各品种一般都很易感染。其感病程度的次序大約如下:栟柑、蕉柑、茶枝柑、蘆柑、桶柑、各种甜橙、紅檸檬、年桔、桑麻柚及四季桔。用实生苗繁殖的福州紅桔及廣柑(橙),和福建龍溪的坪山柚及文旦柚,則未見發病。各齡的柑桔樹——自苗木至20齡以上的老樹——都能感染,一般以3—8齡的幼樹受害最烈?静〉闹饕钗跗诓糠中律业囊度烤然苹T谔鸪取薷毯徒陡躺嫌幸徊糠只苹蛘>G色的叶特别肥大或呈各种畸形狀态,有許多新梢簇生或束化。發病的枝条很快落叶。老枝上的叶有一部分亦黄化脫落。根系腐烂。至發病中期,新梢的叶多呈缺鋅或缺锰病狀,老叶呈缺氮及缺硼病狀,落叶及根腐更嚴重,开花早而多,結果少,部分枝条枯死。到后期,全株嚴重雕殘,終而枯死。本病在70—80年前在廣东潮汕区已有發现,但在近30年來始在各地蔓延成灾壳氨静≡诠愣鄙乔V州市郊及新会縣和福建龍溪縣已成为柑枯業發展的限制因素。
Xinhua County, Panyu County, suburbs of Guangzhou, Longxi County of Fujian Province, suburb of Fuzhou, and citrus fruits of Liucheng, Rongxian County, Xingye County and Yulin County in Guangxi Province all suffered a devastating Disease is called yellow tip, or Huanglong disease. Ward all kinds of citrus varieties are generally very susceptible. The order of their susceptibility are as follows: Citrus, banana, tea tree branches, citrus, barley orange, all kinds of orange, red lemon, orange, Sangmai pomelo and seasons orange. Reproduction of seedlings with Fuzhou red orange and Citrus (orange), and Fujian Longxi Pingshan pomelo and pomelo, then no incidence. Citrus trees of all ages - from seedlings to old trees over the age of 20 - can be infected, usually 3-8-year-old saplings most affected by static> quiet gluttonous 跗 诓 bran in the law Cystic degree grilled Ran Ping 苹 谔 T 谔 鸪 take 薷 blanket only steep terrified Wang branching only > G-color leaves are particularly hypertrophy or a variety of deformities, there are many new shoots tufted or beaming . Diseased branches quickly deciduous. Some of the old leaves are also yellow off. Root decay. To the mid-term, the tip of the shoots were mostly zinc deficiency or manganese deficiency, the old leaves were nitrogen deficiency and boron deficiency, deciduous and root rot more serious, early flowering and more, with fewer results, some of the branches died. To the late, whole plant serious carving residue, and finally died. The disease in 70-80 years ago has been found in Chaoshan District, Guangdong, but in the past 30 years began to spread around the disaster shell ammonia static ≡ interpretive interpretation despicable Qiao V suburbs and Xinhui County and Fujian Longxi County has become a limiting factor in the development of citrus industry.