This is the home version of 'Remedy' fungicide. 'Remedy' is potassium bicarbonate based, while this mixture is sodium bicarbonate based. The sodium version is not quite as effective as the potassium product.

Sodium bicarbonate homemade fungicide recipe:
1 1/2 teaspoons of baking soda
1 teaspoon of vegetable oil
1 gallon of water

Shake to mix thoroughly. Spray on plants to runoff. Reapply on a short (frequent) interval of 5-10 days. Use a shorter interval during rainy weather.