Peronosporan.

Brit.

/ˌpɛrə(ʊ)ˈnɒsp(ə)rə/, U.S.

/ˌpɛrəˈnɑsp(ə)rə/

Forms: 1800s– Peronospora, 1800s– Peronosporos (now rare).

Origin: A borrowing from Latin. Etymon: Latin Peronospora.

Etymology: < scientific Latin Peronospora (A. C. I. Corda Icones Fungorum (1837) I. 20/2) < ancient Greek περόνη (see perone n.) + σπόρος spore n. Compare Italian peronospora (1875).

Mycology.

A genus of fungal plant pathogens of the order Peronosporales, having sporangia borne on the tips of dichotomously branched sporangiophores and causing highly destructive plant diseases (downy mildews); (also in form peronospora) a fungus of this genus. Plasmopara viticola, the cause of downy mildew of grapes, and Phytophthora infestans, the cause of late blight of potatoes, were formerly placed in this genus.

ΘΚΠ

the world > plants > particular plants > plants perceived as weeds or harmful plants > poisonous or harmful plants > harmful or parasitic fungi > [noun] > microscopic

microspore1857

trichophyte1862

Peronospora1867

microsporon1876

thrush-fungus1890

1867 J. Hogg Microscope (ed. 6) ii. i. 293 Organs similar to those long since discovered by Tulasne in Peronospora, which have been called Oogonia.

1879 Encycl. Brit. IX. 830/2 In Peronospora the usual mode of germination is by the emission of a hypha.

1884 Times 26 Dec. 9/6 The shedding of the spores of peronospora at a sufficient distance from the growing roots.

1892 Daily News 9 July 3/5 Vines and olives are promising, and the peronospora..has till now caused no sensible damage.

1895 Times 2 Jan. 13/2 Reports of the appearance of peronosporos on the growing crop [of currants].

1902 Encycl. Brit. XXIX. 94/2 The ‘peronosporos’, a species of white blight, first caused considerable damage in the Greek vineyards in 1892.

1952 W. O. James Elements Plant Biol. (rev. ed.) xxviii. 366 Pythium rapidly damps off the seedlings it attacks and kills them, but the nearly allied fungus Peronospora forms a downy mildew that hypertrophies, but does not rapidly kill, the tissue it invades.

1991 Past & Present Aug. 74 In a crescendo of misery between 1908 and 1910 the commune experienced a devastating cycle of drought, unseasonal hail and the vine-mildew peronospora.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	peronospora
释义	Peronosporan. Brit. /ˌpɛrə(ʊ)ˈnɒsp(ə)rə/, U.S. /ˌpɛrəˈnɑsp(ə)rə/ Forms: 1800s– Peronospora, 1800s– Peronosporos (now rare). Origin: A borrowing from Latin. Etymon: Latin Peronospora. Etymology: < scientific Latin Peronospora (A. C. I. Corda Icones Fungorum (1837) I. 20/2) < ancient Greek περόνη (see perone n.) + σπόρος spore n. Compare Italian peronospora (1875). Mycology. A genus of fungal plant pathogens of the order Peronosporales, having sporangia borne on the tips of dichotomously branched sporangiophores and causing highly destructive plant diseases (downy mildews); (also in form peronospora) a fungus of this genus. Plasmopara viticola, the cause of downy mildew of grapes, and Phytophthora infestans, the cause of late blight of potatoes, were formerly placed in this genus. ΘΚΠ the world > plants > particular plants > plants perceived as weeds or harmful plants > poisonous or harmful plants > harmful or parasitic fungi > [noun] > microscopic microspore1857 trichophyte1862 Peronospora1867 microsporon1876 thrush-fungus1890 1867 J. Hogg Microscope (ed. 6) ii. i. 293 Organs similar to those long since discovered by Tulasne in Peronospora, which have been called Oogonia. 1879 Encycl. Brit. IX. 830/2 In Peronospora the usual mode of germination is by the emission of a hypha. 1884 Times 26 Dec. 9/6 The shedding of the spores of peronospora at a sufficient distance from the growing roots. 1892 Daily News 9 July 3/5 Vines and olives are promising, and the peronospora..has till now caused no sensible damage. 1895 Times 2 Jan. 13/2 Reports of the appearance of peronosporos on the growing crop [of currants]. 1902 Encycl. Brit. XXIX. 94/2 The ‘peronosporos’, a species of white blight, first caused considerable damage in the Greek vineyards in 1892. 1952 W. O. James Elements Plant Biol. (rev. ed.) xxviii. 366 Pythium rapidly damps off the seedlings it attacks and kills them, but the nearly allied fungus Peronospora forms a downy mildew that hypertrophies, but does not rapidly kill, the tissue it invades. 1991 Past & Present Aug. 74 In a crescendo of misery between 1908 and 1910 the commune experienced a devastating cycle of drought, unseasonal hail and the vine-mildew peronospora. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1867
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