FUNGICIDE ACTIVITY OF POWDER MILK AND WHEY TOWARDS E. NECATOR, CAUSAL AGENT OF POWDERY MILDEW OF GRAPEVINE
Aim of this study was to evaluate the efficacy of powder milk and whey, which is included among the basic substances against grapevine powdery mildew. Two field trials were carried out in a commercial vineyard located in Tebano di Faenza (RA) over two-year period 2018-2019. The study consisted of repeated applications of the tested products at 6-8 days interval throughout the season. The powder milk for zootechnical use showed the best performance when used at a dose of 3 Kg/100 L numerically higher than sulfur used at a dose of 0.6 and 0.5 Kg/100 L either in the trial of 2018 and 2019. Same result was obtained by using whey at a dosage of 4.5 Kg/100 L, while an always excellent efficacy, even though slightly lower, was obtained when used at a dose of 3 Kg / 100 L.