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Occurrence and Detection of Citrus Tatter Leaf Virus (CTLV) in Huangyan, Zhejiang Province, China. T. M. Zhang, Taizhou Agricultural School, Zhejiang, China. X. Y. Liang, and C. N. Roistacher. Taizhou Agricultural School, Zhejiang, China, and Department of Plant Pathology, University of California, Riverside 92521. Plant Dis. 72:543-545. Accepted for publication 3 March 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0543.

Citrus tatter leaf virus (CTLV) was detected by graft transmission to indicator plants of Troyer and Carrizo citrange (Poncirus trifoliata (L.) Raf. × Citrus sinensis (L.) Osb.), and by mechanical transmission to cowpea (Vigna unguiculata (L.) Walp.). Graft transmission from infected plants induced characteristic CTLV symptoms of leaf blotch and leaf distortion on leaves of Troyer or Carrizo citrange, and mechanical transmission induced characteristic necrotic localized lesions on leaves of cowpea. Citrus tatter leaf virus was transmitted from all of 31 field trees representing the nine major cultivars growing on two rootstocks, P. trifoliata and Gou-tou-cheng (a sour orange hybrid) in the Huangyan district of Zhejiang Province, China. These nine cultivars were: Ben-di-zao (Citrus succosa Hort. ex Tan.), Mang-ju (C. tardiferax Hort. ex Tan.), Zhao-ju (C. subcompressa), Zhu-hong (C. erythrosa), Ru-Ji (C. kinokuni Hort. ex Tan.), Bei-jing (Meyer lemon C. limon L. Burm. f. hybrid), Ponkan (C. poonensis Hort.), Okitsu-Wase mandarin (C. reticuta Blanco), and Liu sweet orange (C. sinensis). Results of indexing showed a correlation between positive CTLV symptoms on indicator plants and a yellowing, a decline, bud union ring, and bud union incompatibility of Ben-di-zao, Mang-ju, Zhu-hong, Liu orange, and Ponkan cultivars on trifoliate rootstock. However, these same infected cultivars grafted onto Gou-tou-cheng ‘sour orange’ rootstock appear normal.