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柑桔裂皮病(exocortis)是以枳、枳橙和檫檬作砧木的柑桔树的严重病害,它的病原是一种类病毒[4]。有的毒系引起砧木部树皮纵向开裂或翘裂,植株矮化,树势衰退;有的毒系仅引起植株矮化。此病除了嫁接传播外,亦通过修枝剪等与韧皮部接触传播。病害的鉴定,以利用指示植物为主。敏感的指示植物是Etrog香橼的USDCS 60—13选系和亚利桑那861选系[1、2]。此外,亚利桑那861-S-1选系更为敏感[3]。它不仅适用于鉴定一般毒系,亦适用于鉴定弱毒系。防治措施以通过茎尖嫁接脱毒或鉴定选择无病母树繁殖无毒苗木为主,亦要注意防止通过工具等的田间传播。
Citrus exocortis is a serious disease of citrus trees rooted with trifoliate orange, citrange and mangosteen and its pathogen is a kind of virus [4]. Some of the poisoning caused bark longitudinal cracking or cracking of the rootstock section, dwarf plants, the tree potential decline; some of the toxicity caused only dwarf plants. In addition to graft disease dissemination, but also through pruning shears and phloem contact transmission. Identification of the disease, to use the instructions of plants. Sensitive indicator plants are the USDCS 60-13 selection of Etrog Citron and the Arizona 861 selection [1,2]. In addition, the 861-S-1 selection in Arizona is more sensitive [3]. It applies not only to the identification of normal strains but also to the identification of weak strains. Prevention and treatment through the shoot tip graft detoxification or identification of disease-free selection of mother-tree breeding non-toxic seedlings, but also to prevent the spread of tools and other fields.