powdery mildew

Lemma

powdery mildew

Etichetta di dominio

EN

Etichetta grammaticale

c. n.

Definizione

Vine disease which attacks leaves and berries, eventually killing the vine. 1

Nota

All green parts of the vine are attacked. A fine, translucent, cobweb-like growth spreads around the spot where the fungus first penetrates. After one to two weeks grey-white ash-like spores are produced on short, upright stalks. The infection looks powdery, leading to the common name. Spores are spread by wind and, with favourable conditions, new infections rapidly occur. The fungus survives over winter inside buds or on the surface of the vine. [...] Unlike all other fungal diseases of vines, this disease is little affected by humidity, making climate conditions which favour it different from those which favour many other fungal diseases. [...]
Fortunately the control of this disease was discovered soon after it appeared in Europe. […]In dry climates sulphur dust is used and wettable powders are used in higher rainfall regions. Organic fungicides have been developed more recently. Cultural practices such as maintaining a non-shaded canopy [...] help prevent development of the disease. Recent developments in vine breeding have produced varieties with natural resistance and acceptable wine quality. 2

Contesto

Severe powdery mildew infections on the clusters is usually a result of poor fungus control and canopy management throughout this period. 3

Trascrizione fonetica

UK [paʊdəri mɪldju:], US [paʊdɚri mɪldu:] 4

Sinonimi e Antonimi

Synonym: oidium. 5

Abbreviazioni
ND
Etimologia

Powder = late 13c., from O.Fr. poudre (13c.), earlier pouldre (11c.), from L. pulverem (nom. pulvis) "dust".

-y = adjective suffix, "full of or characterized by," from O.E. -ig, from P.Gmc. *-iga (cf. Ger. -ig), cognate with Gk. -ikos, L. -icus.

Mildew = M.E. mildeu "honeydew, nectar," from O.E. mildeaw "honeydew" (sticky stuff exuded by aphids), from P.Gmc. compound of *melith "honey" + *dawwaz "dew" (cf. O.S. milidou, Du. meeldauw, Ger. Meltau "mildew"). 6

Etichetta di paese
ND
Ente

Università degli Studi di Genova, Facoltà di Lingue e Letterature Straniere, Corso di Laurea per Traduttori e Intrepreti.

Data della scheda
Sat Mar 20 00:00:00 2004
Autore

Laura Albanese, rev. Chiara Barbagianni

Fonti

1 : Johnson H., Halliday J., The Vintner’s Art, How Great Wines Are Made, New York, Simon & Shuster, 1992, 1992, pp. 59, 228.

2 : Johnson H., Halliday J., The Vintner’s Art, How Great Wines Are Made, New York, Simon & Shuster, 1992, 1992, pp. 59, 228.

3 : «http://www.my-grape-vine.com/blog/controlling-powdery-mildew-on-grapes/», (17/11/2011)

4 : «http://dictionary.cambridge.org», (17/11/2011)

5 : Johnson H., Halliday J., The Vintner’s Art, How Great Wines Are Made, New York, Simon & Shuster, 1992, 1992, pp. 59, 228.

6 : «http://www.etymonline.com/», (17/11/2011)

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