The mountain knapweed is quite robust. The popular perennial can only be susceptible to powdery mildew infestation. How to recognize and treat fungal infestation.
What do I do about powdery mildew on mountain knapweed?
CuttingFirst remove the infestation completely from the plant. If more than half of the mountain knapweed has been affected by powdery mildew, remove the entire plant. Combat the spread of mildew bySpraying a milk and water mixture
How do I recognize powdery mildew on mountain knapweed?
Mildew appears in the form offungal downon theleaves The mountain knapweed (Cyanus montanus) is usually affected by downy mildew affected. In this case it is a fungal infection. The disease initially appears as a gray coating on the underside of the leaves. After a while, light spots appear on the top of the leaves. Sight the mountain knapweed foliage occasionally. This will help you detect an infestation early.
How do I treat mountain knapweed with mildew?
CuttingThe infected mountain knapweed anddispose of the clippings in the compost. Downy mildew cannot spread from dead plant parts. Some gardeners also cut the stems of mountain knapweeds affected by powdery mildew back to the base. It is best to spray the remaining parts of the plant with a milk-water mixture.
Which home remedies help against mildew?
Spray the affected mountain knapweeds with amilk-water mixture. Use this home remedy for mildew as follows:
- Use raw milk or whole milk.
- Mix with water in a ratio of 1:8.
- Fill mixture into spray bottle.
- Spray plants with it.
Some gardeners also combat mildew by applying baking soda to the plant's leaves.
When does powdery mildew appear on mountain knapweed?
Mildew affects mountain knapweed inwet, cold weather conditions These promote the spread of the pathogen. The disease is also known as bad weather fungus. Check the leaves for spots after cold and rainy days to quickly identify powdery mildew infestation. During the flowering period you don't have to worry about the daisy family with the purple flower color.
How do I prevent powdery mildew on mountain knapweed?
WateringApply the mountain knapweed over the root area andfertilize the plant with field horsetail manure. The manure ensures nutrient-rich soil and strengthens the resilience of the mountain knapweed. When watering, you should not pour water over the leaves. Water the root area and allow the leaves to dry. However, you should definitely avoid waterlogging. This leads to root rot.
Are mountain knapweeds often affected by powdery mildew?
Mildew occurs on mountain knapweedmore common. The hardy perennial is extremely resistant to most other diseases and pests. The plant also grows quite well in sunny and drier locations. Due to the lower humidity, mildew rarely occurs here.
Tip
Beautiful cut flowers for vases
The flowers of the mountain knapweed are reminiscent of the look of the popular cornflower. If you are checking the plant during flowering, cut off a few stems and place them in a vase.