Late Blight
Tomato / Potato
Water-soaked grey-green lesions spreading from leaf tips, with white mould on the underside in humid mornings.
Copper-free milk spray
OrganicMix 1 part raw milk to 9 parts water. Spray leaves early morning, twice a week.
≈ $0.30 per application
Remove & burn infected foliage
OrganicCut affected leaves at the stem, bag them, and burn away from the field.
Free
Neem + baking soda barrier
Organic5 ml neem oil + 5 g baking soda + 1 L water. Coat both leaf surfaces weekly.
≈ $0.60 per litre