The black-eyed Susan is a climbing plant that enchants us with its lush flowers. The plant comes from warm regions of Africa. It is considered robust and tolerates drought very well. Moisture and care errors, on the other hand, can easily trigger mildew infestation.
How do I recognize powdery mildew on the black-eyed Susan?
Downy mildew on the black-eyed Susan is manifested by yellowish-brown spots on the upper side of the leaves. These feel a bit raised when you stroke over them. On the underside of the leaves there is a gray-purple fungal lawn.
How does mildew develop on the black-eyed Susan?
Although the black-eyed Susan is considered very robust, it is quickly weakened in the wrong location orif care is made incorrectly This means that pathogens can harm the plant. Mildew fungi can be found on infected plants or on the soil beneath them. Wind and rain spread the spores of these fungi to other plants. If the black-eyed Susan is too wet and the leaves do not dry, the spores find optimal growth conditions there.
How do I combat powdery mildew on the black-eyed Susan?
As a first step in the event of downy mildew on the black-eyed Susan, you must remove allaffected parts of the plant Do not dispose of it in the compost, but in household waste. Place the plant in a sunny and dry location. Spray the plant with garlic broth. To do this, scald 50 grams of garlic with one liter of boiling water. After 24 hours, you can sieve it and use it. As a pickling agent, you should dilute the garlic broth in water at a ratio of 1:10 and then use it every three days.
What measures help against mildew infestation?
The black-eyed Susan is a climbing plant and shouldgrow on a trellis. This makes the plant more airy and the leaves can dry better. After a heavy rain, you can reduce the water on the leaves by shaking them gently.
Tip
The right location
The black-eyed Susan needs a sunny spot with at least 3 hours of direct sun. In damp and cool summers, you should place the pot in a sunny but covered location as close to the house as possible. Water only on the soil or roots. With these measures you can avoid too much moisture on the leaves and thus an infestation with powdery mildew.
