تاثیر فرمولاسیون چهار ترکیب معدنی در کنترل سفیدک پودری توت‌فرنگی

Powdery mildew, caused by the fungus Podosphaera aphanis, is one of the most significant airborne diseases affecting strawberry plants, rapidly spreading and infecting all bushes in relatively humid climates. Considering the physiology of the plant and the timing of disease occurrence, which coincides with fruit production, the use of organic chemical fungicides against this disease in strawberries poses the challenge of potential residue. Residue in the fruit compels producers to use biological agents and mineral-based fungicides. Nowadays, there is a special focus on mineral salts in controlling plant diseases, with the efficacy of sodium and potassium salts in controlling plant diseases being established. To evaluate the efficiency of mineral salts, including borax, potassium bisulfate, aluminum chloride, and sodium metabisulfite, these compounds were formulated using adjuvants such as Tween 20, Span 80, and PEG at concentrations of 6%, 4%, and 5% by weight respectively, and based on 10% flaxseed oil. Greenhouse conditions were prepared for the epidemic of powdery mildew, and the formulations were applied four times a month. The resulting formulations were assessed for stability and compared with the fungicide difenoconazole + fluxapyroxad (Dagonis 12.5%). The results indicated that aluminum chloride had the highest efficacy in disease control after the reference fungicide Dagonis, with the infection severity in the aluminum chloride treatment being close to the reference fungicide. Borax, potassium bisulfate, and sodium metabisulfite showed similar efficacy. Overall, the four formulated treatments had approximately 48% less infection compared to the infected control. Research and optimization of the formulations are ongoing.