Gardeners are spraying tomato plants with a mixture of milk whey and iodine to protect crops from late blight and improve harvests. Milk whey contains lactic acid, beneficial bacteria, amino acids, and minerals. Sprayed onto leaves during the growing season, it forms a thin film that creates unfavorable conditions for fungal growth.
Regular applications supply microelements and improve leaf condition. Iodine acts as an antiseptic to lower fungal risk, though no scientific evidence proves the mixture replaces fungicides. Experts classify it as a folk preventive remedy and recommend registered fungicides if disease actively spreads.
Soil Watering and Leaf Spraying Guidelines
Watering roots with pure whey is not recommended, as high acidity can alter soil composition and disrupt plant nutrition over time. Gardeners who water with whey should dilute one liter of whey in 10 liters of water and use it only occasionally. Spraying leaves remains the primary application method.
The standard recipe requires one liter of milk whey, nine liters of water, and 10 to 15 drops of pharmacy iodine. This solution is used exclusively for leaf spraying.
Application Rules for Maximum Protection
Gardeners should spray in the morning or evening during dry, windless weather, wetting both sides of the leaves thoroughly. Heavy rain can wash off the protective layer, requiring a repeat application. Spraying once every seven to 10 days is sufficient for prevention.
