fascicolo / issue 1 - CRA-PAV

More documents

Recommendations

Info

Petria - “Dosi ridotte di rame e prodotti alternativi per la difesa antiperonosporica”hanno messo in luce una lieve puntinatura necrotica a livello fogliare, visibile solo peri dosaggi più elevati e mai tale da destare problemi alla coltura. Grappoli e tralci nonhanno mai presentato sintomi ascrivibili all’uso del prodotto.Si può concludere che il nuovo idrossido di rame Funguran-OH 250SCpuò rapprentare una valida alternativa, fra i prodotti rameici, per le aziende e nellesituazioni in cui si chiede di ridurre gli apporti cuprici.Parole chiave: Idrossido di rame, Peronospora, Vite.Grapevine downy mildew control by a formulation with a reduceddose of copper hydroxideOver the last years, the limits imposed by the European Union for the useof copper in organic agriculture have urged research to direct its attention towardsthe natural copper-free active ingredients (Dongiovanni et al., 2008), and to look fornew formulations where the copper fraction is more available and active towards thepathogens, to reduce the quantity per ha of the active ingredient (Bortolotti et al.,2006; Dongiovanni et al., 2008). In the first case, no concrete results have been foundthat can be applied routinely in agricultural practice, whereas the second hypothesis isnow offering higher guarantees after some years of experimentation (Morando et al.,2005; Egger e D’Arcangelo, 2006). This second hypothesis also includes the projectof Spiess Urania and Certis Europe, with the fine tuning and testing of a new copperhydroxide formulation (Funguran-OH 250SC), which has been tested over the lastfew years in Piedmont, by VitEn, Calosso (AT).Several different trials were carried out between 2004 and 2008, which wereaimed at testing the effectiveness of Funguran-OH 250SC in the control of grapevinedowny mildew (caused by Plasmopara viticola), with low-volume treatments (250 l/ha) and high-volume treatments (1000 l/ha). The effects of Funguran-OH 250SC weretested at different copper metal doses (250, 300, 375, 480, 500, 600 and 625 g/ha),and compared to an untreated plot and two formulations of copper hydroxide used asreferences: (i) copper hydroxide 35% DF at doses of 525 and 700 g/ha; and (ii) copperhydroxide 15% DF at the dose of 300 g/ha. Also, the possible phytotoxicity towardsthe grapevine was assessed.The downy mildew appeared every year in the vineyards examined, withhigh virulence, which caused heavy damage to the untreated plots. The effectivenessseen during the period of 2004-2007 was always good at all of the tested doses, witha direct proportion of effectiveness according to the dose, which was visible both onthe leaves and the bunches. In comparison to copper hydroxide 35% DF in the period2004-2007, the tested product showed similar or slightly superior effectiveness at thesame doses of copper metal, which ranged from 500 to 700 g/ha.In 2008, the quantity of copper metal was further reduced, ranging from 30033
Petria 20 (1), 1-72 (2010) – Atti Convegno - Ancona, 26 Febbraio/February 2010to 500 g/ha. In this year, when P. viticola was particularly virulent, it was possibleto notice that with the same concentration of copper metal per hectare (300 g/ha) forFunguran-OH 250SC and copper hydroxide 15% DF, the effectiveness of both of theproducts were similar statistically. The phytotoxicity assessments noted some lightnecrotic dots on the leaves, which were visible only at the higher doses, althoughthese never caused damage to the plants. For the bunches and shoots, no symptomswere noted.To conclude, the new copper hydroxide Funguran-OH 250SC may representa valid alternative among the copper products for the vine growers, in all of thesituations where a reduction in copper metal dosing is required.Key words: Copper hydroxide, Downy mildew, Grapevine.Lavori citati/ReferencesBortolotti P.P., R. Nannini, M. Scannavini, 2006. Valutazione di diversi compostirameici a basso dosaggio nella difesa antiperonosporica della vite in provinciadi Modena. Atti Giornate Fitopatologiche, 2, 173-178.Dongiovanni C., M. Giampaolo, A. Di Carolo, A. Gasparre, N. Masiello, A.Santomauro, F. Faretra, 2008. Attività antiperonosporica di dosi ridotti dirame e di sostanze alternative in vigneti dell’Italia meridionale. Atti GiornateFitopatologiche, 2, 315-320.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.Morando A., F. Sozzani, G. Moiraghi, 2005. Rameici a dosaggio ridotto contro laperonospora della vite. L’Informatore Agrario, 61(13), 67-69.34
Page 2 and 3: Petria - “Dosi ridotte di rame e
Page 72: Petria - “Dosi ridotte di rame e

fascicolo / issue 1 - CRA-PAV

Create successful ePaper yourself

Delete template?

Save as template?