horticulture oils

Pest Control Spray You Can Make in Your Kitchen (pdf)

To control powdery mildew, add 3 tbsp of oil to 1 gallon of water containing 1/2 tsp of detergent soap. Mix well, and stir or shake constantly while in the process of application.

Horsetail 'Equisetum' is a mineral rich plant which works as fertilizer, and cure-all against mildew and block spot on roses. Chop several handfuls of horsetail into 1L of water and bring to a boil. Simmer for two to three hours, cool, strain, and use as a spray.

Read more about Horticulture oils here.

Dormant oils are used on woody plants during the dormant season. The name refers to the time of application rather than to any attribute of the oil.