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- Plant disease resistant varieties
- Plant the right varieties for the season
- Ensure good air circulation around the plants
- Ensure at least 6 hours of direct sunlight a day
- Avoid overhead watering
- Mulch under your plants well with grassy hay or sugarcane mulch
- Do not over fertilise with a nitrogen rich fertilser (do not over fertilise at all 😉
- Remove all leaves close to and touching the ground
- Remove all infected leaves ASAP and dispose of away from the garden
- For Tomatoes use a bicarbonate soda spray on the all over leaves, stems and the ground under the plants fortnightly here’s the recipe from www.annettemacfarlane.com
- For Cucurbits use a milk spray the recipe is also from www.annettemacfarlane.com
Bicarb Soda Spray
- 1 tablespoon of bicarbonate soda
- 4.5 litres of water
- 1 tablespoon of homemade Oil Spray concentrate (see below) or commercial oil spray (vegetable oil based)
- Spray weekly as a preventative treatment to minimise black spot and mildew.
Milk Spray
- Powdery mildew appears as grey or white powdery spots on the new foliage. It causes puckering of the foliage and in severe infestations, a burnt appearance and leaf fall.
- 1 part of full cream milk
- 9 parts of water
- Spray regularly over the leaves, paying particular attention to soft new growth
