One of the problems with most black-eyed Susans is that by midsummer you may notice Septoria leaf spot on the foliage. It arrives in warm, wet, humid weather.

Symptoms include yellowing of lower leaves followed by wilting and death of the rest of the plant. A white cottony mass of mycelium growing around the crown or ...

18 июн. 2024 г. · Wilted or discolored leaves? Check water, light, and nutrients. · Pests present? Hose down or introduce natural predators. · Sunburn or root rot?

13 мая 2023 г. · Black-eyed Susan has a tendency to spread, particularly when it's in the sort of location it likes: full sun and rich, well-drained soil. When ...

3 авг. 2020 г. · By the time symptoms appear, initially often yellowing foliage before the deformed or dwarfed flowerheads, it's too late. There is no cure.

Although the black-eyed Susan has not been known to poison humans, it should not be eaten. It can cause allergic skin reactions and asthma attacks in people ...

24 мая 2024 г. · Common Problems with Black-Eyed Susan. Powdery mildew can affect the leaves in hot, humid conditions. Minimize this by planting in full sun ...

11 июл. 2021 г. · This damage to the petals appears to be caused by chewing insects, possibly beetles or earwigs. You can check around the folds of the buds and the leaves.

There are two main diseases that Black-Eyed Susans can succumb to; and both are caused by fungal pathogens. The first is powdery mildew which is characterized ...