phloem necrosis
noun Date: 1923 a pathological state in a plant characterized by brown discoloration and disintegration of the phloem; especially a fatal disease of the American elm caused by a phytoplasma transmitted by a leafhopper (Scaphoideus luteolus)

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • phloem necrosis — noun : any pathological state in a plant characterized by brown discoloration and disintegration of the phloem: as a. : a phase of potato leaf roll in which such changes occur b. : a virus disease of tea c. : a fatal virus disease of the American …   Useful english dictionary

  • phloem necrosis — Plant Pathol. a disease of the American elm caused by a mycoplasmalike organism, characterized by yellowing and necrosis of the foliage and yellowish brown discoloration of the phloem. [1920 25] * * * …   Universalium

  • elm phloem necrosis — noun : phloem necrosis c …   Useful english dictionary

  • net necrosis — noun : a necrosis of the phloem of the potato tuber caused by frost or the leaf roll virus in which the pith and cortex contain a broken netlike pattern of necrotic cells …   Useful english dictionary

  • Phytoplasma — Phyllody induced by phytoplasma infection on a coneflower (Echinacea purpurea). Scientific classification Division …   Wikipedia

  • Elm Yellows — is a plant disease of elm trees that is spread by leafhoppers or root grafts. Elm Yellows. Elmcare.Com. 19 Mar. 2008 . ] Elm Yellows, also known as Elm Phloem Necrosis, is very aggressive and there are no known cure for it. Elm Yellows is known… …   Wikipedia

  • Glossary of phytopathology — This is a glossary of some of the terms used in phytopathology.Phytopathology is the study of plant diseases. It is a multi disciplinary since prerequisites for disease development are the presence of a susceptible host species, a pathogen and… …   Wikipedia

  • НЕКРОЗ ЛУБА ЧАЙНОГО КУСТА — англ.phloem necrosis of tea plant нем.Phloem Nekrose, Teestrauch франц.nécrose du phloème du théier возбудитель:Camellia virus 1 Bond см …   Фитопатологический словарь-справочник

  • Potato leafroll virus — Taxobox color=violet name = Potato leafroll virus (PLRV) virus group = familia = Luteoviridae genus = Polerovirus species = Potato leafroll virus synonyms = potato phloem necrosis virusPotato leafroll virus (PLRV) is a plant pathogenic virus of… …   Wikipedia

  • Dutch elm disease — a disease of elms characterized by wilting, yellowing, and falling of the leaves and caused by a fungus, Ceratostomella ulmi, transmitted by bark beetles. [1920 25] * * * Widespread disease that kills elms, caused by the fungus Ceratocystis ulmi …   Universalium

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