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Petria - “Dosi ridotte di rame e prodotti alternativi per la difesa antiperonosporica”and two alternative natural compounds based on bentonite (Bentotamnio) and acombination of rock powder and propolis (Cabasan and Propoli). Since the end ofApril/ beginning of May up to the end of July, a volume equivalent to 1000 l/ha ofall of these formulations was sprayed weekly onto the canopy of vines arranged infour randomized blocks, using a motorized backpack sprayer. In the third year, wetested a grapevine downy mildew control strategy consisting of cyclic application ofcopper compounds applied at their full rates (copper hydroxide, used as a referencestandard, and copper peptidate) and 70% of the full rate (copper hydroxide, Bordeauxmixture and dicopper oxide), which showed a good level of protection in the firsttwo-year trials, intercalated with the two alternative compounds. The field trials werecarried out at two different locations (Camerano and Montecarotto, Ancona Province),considering two different cultivars (Verdicchio and Montepulciano), both with weeklyapplications, and according to the epidemiological risk.In the trials carried out in 2007 and 2008, when low disease pressure occurred,all copper fungicides gave satisfactory protection, even with the lowest copper doses,as did the alternative compounds, even if these showed a reduced magnitude of diseasereduction as compared to the control. In the third year, no significant differences wereseen among the protection strategies and the treatments, showing good effectivenessof the alternative compounds when intercalated with the copper formulations at lowrates. Therefore, these alternative compounds can be considered as good alternativesto copper formulations, particularly for application in a part of the season that ischaracterized by low epidemic risk of infections, in order to reduce overall copperuse.Key words: Grapevine downy mildew, Integrated control, Organic control, Protectionstrategies, Vitis vinifera.RingraziamentiSi ringraziano la Regione Marche per il progetto “Valutazione dell’efficacia contro Plasmoparaviticola di composti rameici utilizzati a dosi ridotte in viticoltura biologica e valutazione di prodottialternativi”, le aziende agricole Pievalta, Podere Samargi e Cooperativa Terre Cortesi Moncaro per lacollaborazione alle prove di campo ed Erica Feliziani per il contributo all’elaborazione dei dati.11
Petria 20 (1), 1-72 (2010) – Atti Convegno - Ancona, 26 Febbraio/February 2010Lavori citati/ReferencesBunelli A., 1995. I prodotti naturali nella lotta alle malattie fungine. Difesa dellePiante, 18, 57-69.Agnelli A., R. Cuniglio, G. Corti, 2002. Frazionamento chimico del rame nei suolidei vigneti. Informatore Agrario, 58(34), 71-74.Bortolotti P.R., P. Nannini, M. Scannavini, L. Antoniacci, R. Bugiani, 2006.Valutazione di diversi composti rameici a basso dosaggio nella difesaantiperonosporica della vite. Atti Giornate Fitopatologiche, 2, 173-178.Egger E., M.E.M. D’Arcangelo, 2006. Valutazione dell’efficacia di antiperonosporicia basso apporto di rame nella difesa della vite in Toscana. Atti GiornateFitopatologiche, 2, 179-186.Sancassani G.P., M. Buccini, P. Fremiot, G. Rho, S.L. Toffolatti, A. Vercesi, 2006.Prove di efficacia antiperonosporica di prodotti a basso dosaggio di rame suvite. Atti Giornate Fitopatologiche, 2, 167-172.Dongiovanni C., C. Giampaolo, M. Di Carolo, A. Gasparre, N. Masiello, A.Santomauro, F. Faretra, 2008. Attività antiperonosporica di dosi ridotte dirame e di sostanze alternative in vigneti dell’Italia meridionale. Atti GiornateFitopatologiche, 2, 315-320.12
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