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Vit.En. - Vecchi e nuovi antiperonosporici sperimentati in vigneti del Piemonte

Vit.En

Vecchi e nuovi antiperonosporici sperimentati in vigneti del Piemonte

Di Giulio Moiraghi, Albino Morando, Simone Lavezzaro

Atti Giornate Fitopatologiche, 2, 211 - 218, 2006

RIASSUNTO
In vigneti fortemente soggetti ad attacchi di peronospora sono stati saggiati, per un biennio, diversi fungicidi in commercio e sperimentali, impiegati a calendario fisso di 10-12 giorni, rilevando l’evoluzione della malattia su foglie e grappoli. Nonostante le condizioni di forte pressione del fungo, che hanno portato ad avere testimoni totalmente colpiti, i fungicidi in prova, siano essi tradizionali (cymoxanil + fosetyl Al + mancozeb e dimethomorf + mancozeb), o di recente introduzione (fenamidone + fosetyl Al, fenamidone + iprovalicarb + fosetyl Al, iprovalicarb + fosetyl Al + mancozeb, iprovalicarb + mancozeb, pyraclostrobin + metiram e zoxamide + mancozeb) hanno ben protetto vegetazione e produzione. Risultati altrettanto buoni sono stati ottenuti con i prodotti sperimentali ormai gia collaudati da più anni (benthiavalicarb + folpet e benthiavalicarb + mancozeb) ed anche con il recentissimo principio attivo mandipropamid abbinato a folpet o mancozeb.
Parole chiave: vite, peronospora, Plasmopara viticola, fungicidi, Moscato

SUMMARY
ACTIVITY OF NEW AND OLD FUNGICIDES AGAINST DOWNY MILDEW IN PIEDMONT VINEYARDS
Several commercial and experimental fungicides were tested over a two years period in vineyards high conductive to grapevine downy mildew (Plasmopara viticola) in a 10-12-day interval spray program. The disease incidence on leaves and clusters was assessed. Despite the disease completely destroyed the untreated control plots, all the compounds tested , both commercial (cymoxanil + fosetyl Al + mancozeb, dimethomorph + mancozeb, fenamidone + fosetyl Al, fenamidone + iprovalicarb + fosetyl Al, fosetyl Al, iprovalicarb + fosetyl Al + mancozeb, iprovalicarb + mancozeb, pyraclostrobin + metiram, zoxamide + mancozeb) and experimental (benthiavalicarb + folpet, benthiavalicarb + mancozeb, mandipropamid + folpet, mandipropamid + mancozeb) showed high control of the disease with low differences in the activity among fungicides.
Keywords: grapevine, downy mildew, Plasmopara viticola, fungicides, Moscato