Glasilo biljne zaštite, Vol. 13 No. 6, 2013.
Izvorni znanstveni članak
Grape powdery mildew (Erysiphe necator Schwein.) - the most destructive fungi in Medjimurje vineyards region
Milorad Šubić
; Poljoprivredna savjetodavna služba Podružnica Međimurske županije, Čakovec
Sažetak
Powdery mildew (Erysiphe necator) is one of the most widespread diseases of grapevine across Europe, and its control requires intensive fungicide sprays. The causal agent overwinters in many grapevine growing regions as cleistothecia, which in the following spring discharge ascospores that cause primary infections and trigger powdery mildew epidemics. Because grape powdery mildew pathogen is a cosmopolitan, sexually crossing population, resistance management for fungicides used in disease control is imperative to preserve their utility. Strobilurin group of fungicides (Qol) was introduced into Croatian vineyards in 1998 and 1999. During 2010, 2011 and 2012 growing season, reduced efficacy of azoxystrobin, pyraclostrobin, kresoxim-methyl and trifloxystrobin was observed in northern part of Croatian wine-growing region Medjimurje. For this reason, grapevine producers in Medjimurje are advised to use strobilurin fungicides alone only once (lx) during the season, before the flowering in a tank-mix with contact (protectant) fungicide (sulfur) for resistance-management purposes. In 7-year open-field experiments, some fungicides applied after flowering reduced powdery mildew cleistothecia formation.
Ključne riječi
powdery mildew; grapevine; fungicide; chemical control
Hrčak ID:
169051
URI
Datum izdavanja:
1.11.2013.
Posjeta: 1.221 *