![]() ![]() Molecular analysis of the mitochondrial cytochrome oxidase I gene is useful for separating P. citri from other morphologically similar species of Planococcus such as P. citri and the fluorescence karyotype (D287/170), the location of constitutive heterochromatin, rRNA sites and NORs activity show that in the heterochromatic chromosome set, ribosomal genes are still active ( Ferraro et al., 1998). Recent cytogenetic characterization of the chromosomes of P. citri have been recorded on coffee in East Africa ( Gowdey 1917 Hargreaves, 1925), but the root form was probably a misidentification of Planococcus fungicola, described by Watson and Cox (1990) in an association with the fungus Diacanthodes novoguineensis on coffee roots in East Africa. citri on cocoa in West Africa most probably included Planococcus minor (Maskell), which is morphologically very similar.Īs on cocoa in West Africa ( Entwistle, 1972), an aerial form and a root form of P. Cox (1989) and Padi (1994, 1997a) suggested that earlier records of P. coleorum Marchal described from Coleus in 1908 was also synonymized with P. She concluded that specimens identified as Planococcoides cubanensis and Planococcus cucurbitae by Ezzat and McConnell (1956) were aberrant specimens of P. ![]() ![]() citri is morphologically highly variable under different environmental conditions and on different host plants. The species exhibits a wide range of morphological variation which probably represents a complex of different ecological, biological and geographical races ( Ferris, 1950 De Lotto, 1964 Padi, 1990, 1994) or possibly cryptic species ( Rung et al., 2009). Synonyms and generic combinations are listed by Ferris (1950), Ezzat and McConnell (1956), De Lotto (1964), McKenzie (1967), Cox (1983, 1989) and García et al. It was placed in the genus Pseudococcus Westwood by Brain in 1915 and remained there until it was transferred to the genus Planococcus by Ferris (1950). ![]() The species probably originated from China ( Bartlett, 1978). Planococcus citri was first described as Dorthesia citri by Risso in 1913 from specimens on Citrus in southern France. Gewächshausschmierlaus Weisse Kaffeewurzellaus Zitrus SchmierlausĬocciniglia bianca farinosa della vite cocciniglia cotonosa degli agrumi cocciniglia cotonosa della viteĬotonet del naranja escama algodonosa piojo harinoso de los citricos
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