What is the black stuff on my Black Eyed Susans?
Correspondingly, how do you get rid of black spots on black eyed Susans?
Chlorothalonil (Daconil) is a common fungicide that's effective for this leaf spot disease. Organic gardeners can use copper-based fungicides. You can do a few other things to discourage a repeat of the disease. One is to rake and remove fallen leaves since that's a good source of spores to keep the disease active.
Beside above, what's eating my black eyed Susan? As with many other types of garden plants and flowering perennials, aphids are the primary insect pest of black-eyed Susans. They indirectly contribute to mold infections by feeding on plant sap and then excreting a substance called honeydew, which encourages growth of black sooty mold.
Similarly, it is asked, how do you treat Black Eyed Susan fungus?
Control Powdery Mildew, Leaf Spot and Rust
- Add 1 gallon of soft water into a bucket.
- Transfer the diluted neem oil to a clean handheld sprayer or pump sprayer.
- Reduce the treatments to a 14-day schedule to prevent the disease from returning.
Do Black Eyed Susans multiply?
Black-eyed Susans produce fibrous roots that spread horizontally in the soil. If you pull black-eyed Susans from your garden and leave some root pieces behind, the clumps eventually produce a new plant. You can create a constant supply of new flowering plants by dividing the clumps in the fall after blooming.