exocortisn.

/ɛksəʊˈkɔːtɪs/

Etymology: < exo- prefix + Latin corti(ci)s genitive of cortex bark.

Botany.

A viroid disease of certain citrus plants, esp. of the trifoliate orange ( Poncirus trifoliata), the symptoms of which include exfoliation, scaling of the bark, and severe stunting of the crown.

ΘΚΠ

the world > plants > disease or injury > [noun] > type of disease > viral diseases

rosette disease1891

mosaic disease1894

mosaic1900

bunchy top1919

spotted wilt1919

streak disease1923

streak1930

streak virus1930

kromnek disease1932

wound-tumour disease1945

exocortis1948

1948 Calif. Citrograph 33 230/1 A bark shelling of trifoliate orange, known as exocortis, has been noted occasionally for many years but has been hitherto considered a minor manifestation on this stock.

1952 Calif. Agric. Nov. 5/1 The citrus root disease called exocortis is present in most areas where trifoliate orange—Poncirus trifoliata—is used as a rootstock.

1962 J. N. Winburne Dict. Agric. 268/1 Exocortis, a virus disease of the trifoliate-orange.

1977 S. P. Raychaudhuri Man. Virus Dis. Trop. Plants xiv. 132 Exocortis of citrus was formerly known to be due to virus. However, recently it has been established that this malady is due to a new entity called viroid.

1981 T. O. Diener in E. Kurstak Handbk. Plant Virus Infections xxvii. 922 In many citrus species and varieties, infection with the exocortis agent does not result in obvious macroscopic symptoms.

1984 D. A. Roberts & C. W. Boothroyd Fund. Plant Pathol. (ed. 2) iv. 46 Among these pathogenic agents are those of..exocortis of citrus, and chlorotic mottle of chrysanthemum.

This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).

单词	exocortis
释义	exocortisn. /ɛksəʊˈkɔːtɪs/ Etymology: < exo- prefix + Latin corti(ci)s genitive of cortex bark. Botany. A viroid disease of certain citrus plants, esp. of the trifoliate orange ( Poncirus trifoliata), the symptoms of which include exfoliation, scaling of the bark, and severe stunting of the crown. ΘΚΠ the world > plants > disease or injury > [noun] > type of disease > viral diseases rosette disease1891 mosaic disease1894 mosaic1900 bunchy top1919 spotted wilt1919 streak disease1923 streak1930 streak virus1930 kromnek disease1932 wound-tumour disease1945 exocortis1948 1948 Calif. Citrograph 33 230/1 A bark shelling of trifoliate orange, known as exocortis, has been noted occasionally for many years but has been hitherto considered a minor manifestation on this stock. 1952 Calif. Agric. Nov. 5/1 The citrus root disease called exocortis is present in most areas where trifoliate orange—Poncirus trifoliata—is used as a rootstock. 1962 J. N. Winburne Dict. Agric. 268/1 Exocortis, a virus disease of the trifoliate-orange. 1977 S. P. Raychaudhuri Man. Virus Dis. Trop. Plants xiv. 132 Exocortis of citrus was formerly known to be due to virus. However, recently it has been established that this malady is due to a new entity called viroid. 1981 T. O. Diener in E. Kurstak Handbk. Plant Virus Infections xxvii. 922 In many citrus species and varieties, infection with the exocortis agent does not result in obvious macroscopic symptoms. 1984 D. A. Roberts & C. W. Boothroyd Fund. Plant Pathol. (ed. 2) iv. 46 Among these pathogenic agents are those of..exocortis of citrus, and chlorotic mottle of chrysanthemum. This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018). < n.1948
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