Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Daniel JALOBĂ, Stelica CRISTEA
Apple powdery mildew caused by Podosphaera leucotricha is one of the most common and severe diseases of this plant in all production areas. In years under favorable conditions for the disease, especially for susceptible varieties, it causes significant damage to apple orchards of up to 80% of the harvest. The research was carried out between 2019 and 2021 within the Research and Development Station for Fuit Growing Voinești and aimed at the effect of Polisulf product type MIF and Sulfomat 80 PU on the attack of the monitored pathogen on Jonathan and Golden Delicious varieties. The highest degree of attack was calculated for the Jonathan variety of 60.8% in 2021. The effectiveness of the treatments was 80.5% - 84.8% for the Jonathan variety and 88.2% - 96.4% for the Golden Delicious variety. Sulfur-based products have provided good protection against powdery mildew and are recommended in integrated apple protection systems.
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