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Best resistance inducer among the strategies compared over the
three years of the VI.SO. Project trials both applied alone and in
combination with copper.
ATTI Giornate Fitopatologiche, 2016, 2,
445-452
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CONTROL STRATEGIES OF DOWNY MILDEW
(Plasmopara viticola): COPPER RATE
REDUCTION AND ALTERNATIVE PRODUCTS
D. MOSETTI, C. LUJAN, L. BIGOT, M. STECCHINA,
L. MARIZZA, M. PINAT, P. SIVILOTTI, G. BIGOT
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Perleuve S.r.l., via Isonzo 25/1, I-34071 Cormons
(GO), Italia - University of Nova Gorica, Wine Research
Centre, Glavni trg 8, 5271 Vipava, Sloveniaz
Fertenia at Vinitaly: Interview after the results
of the experimentation of the VI.SO. Project.
SUMMARY
In organic vineyard management, cupric The results confirmed that strategies with
products are currently the only technical higher dosages of copper are most effective
means effective against downy mildew, in controlling downy mildew. Strategies
with an overall annual use limit of 6 including resistance inductors or biosti-
kg/ha of copper metal, and they are also mulants gave interesting results in some
widely used in conventional management. cases, but especially when combined with
In the 2013-15 seasons in a "Merlot" copper products.
vineyard located in the area of Cormons On the basis of the efficacy results obtained,
(Gorizia), an experimental trial was it became clear that it is very important to
carried out with the aim of reducing the calibrate the timing of intervention on the
quantity of copper applied, while maintai- basis of the prediction of infectious events.
ning adequate efficacy against downy
mildew. Of the strategies compared, Previen
(based on plant extracts) performed well
The strategies set up included copper in all three years, both when applied alone
limitations of 3 and 6 kg/ha/year using and in combination with copper.
different formulations of copper
products, but also biostimulants and
low copper foliar fertilisers placed at
different times.
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