A new product from Richgro, Black Spot & Fungus Killa is a systemic fungicide that is taken up by the plants roots to control diseases. It has been shown to protect roses and other ornamental plants from fungal diseases such as black spot, powdery mildew and rust.
The great thing about this product is that it is used dry, no mixing or spraying, just sprinkle onto the soil around the plant and water. Gives 2 months protection.
Apply early spring, before any infection is visible. Remove mulch from around the area and sprinkle directly onto the soil. Use at a rate of 5-10g per plant.
If applying later in the season when infection is visible you will need to increase the rate to 10-20g per plant, again sprinkle directly on the soil and water in well.
Chemical-based products need to be used with caution. Do not allow pets in areas where product could be consumed.