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Influenza della temperatura sulla germinazione delle oospore di Plasmopara viticola (Berk, et Curt.) Berl. et De Toni

C. Laviola, S. Burruano and S. Strazzeri
Phytopathologia Mediterranea
Vol. 25, No. 1/3 (Dicembre 1986), pp. 80-84
Stable URL: http://www.jstor.org/stable/42685582
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Influenza della temperatura sulla germinazione delle oospore di Plasmopara viticola (Berk, et Curt.) Berl. et De Toni
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Abstract

Nel corso di tre anni, è stata studiata in Sicilia l'influenza esercitata dalla temperatura sulla germinazione delle oospore di Plasmopara viticola (Berk, et Curt.) Berl. et De Toni. Ooospore raccolte in autunno e poste a svernare in condizioni simili a quelle naturali hanno germinato, nella primavera successiva, a temperature comprese tra 10 e 28°C, con optimum a 20-22°C. La germinazione è stata più rapida a 22-24°C e piuttosto lenta alle basse temperature. I risultati di queste prove vengono discussi in relazione alla loro implicazione nella previsione delle infezioni primarie della peronospora della Vite. During a tree-year trial, an investigation on the effect of temperature on oospore germination in Plasmopara vitícola (Berk, et Curt.) Berl. et De Toni has been carried out in Sicily. Oospores collected in autumn and overwintered in near natural conditions, in the following spring germinated from 10 to 28°C, with an optimum at 20-22°C. Germination was rather slow at low temperatures, reaching the shortest lenght at 22-24°C. Finally, considerations on the implications of the results obtained in this investigation on the forecast of primary infections of the grapevine downy mildew are made.

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