Q. What is the best way to
get rid of white powdery mildew on my Euonymous plants?
get rid of white powdery mildew on my Euonymous plants?
A. The best way is without using chemicals. This requires
understanding the conditions which create powdery mildew. The conditions that
create powdery mildew are high humidity, splashing water, shade, and lack of
air movement across the leaves. Applying chemicals only circumvents the problem
and doesn’t find a long-term solution to the problem.
If this advice is followed, there is no need for applying chemicals to control powdery mildew in our climate.
understanding the conditions which create powdery mildew. The conditions that
create powdery mildew are high humidity, splashing water, shade, and lack of
air movement across the leaves. Applying chemicals only circumvents the problem
and doesn’t find a long-term solution to the problem.
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| Powdery mildew on Japanese euonymous and leaf death. |
If this advice is followed, there is no need for applying chemicals to control powdery mildew in our climate.
New location? Make sure your plants are in as much sun as possible. If
this is not possible, you might consider a different location for these plants
or planting new ones.
this is not possible, you might consider a different location for these plants
or planting new ones.
Splashing water. Do not let water from sprinklers splash on the leaves.
Prune the plant to create openings for movement of air between the leaves. If
there are trees above the plants, consider removing limbs of these trees that
are creating too much shade so that more light reaches the plants.
Prune the plant to create openings for movement of air between the leaves. If
there are trees above the plants, consider removing limbs of these trees that
are creating too much shade so that more light reaches the plants.
Secondly, if these plants are receiving water from
sprinklers, switch to drip irrigation. If these plans are being sprinkled with
water accidentally, solve this problem so that the leaves do not receive water
from sprinklers.
sprinklers, switch to drip irrigation. If these plans are being sprinkled with
water accidentally, solve this problem so that the leaves do not receive water
from sprinklers.
Prune for air circulation. Prune these plants deep
inside their canopy and remove stems that are too close to others and allow
more air movement or wind through these plants. As a last resort, you can use
fungicides such as the sulfur based more copper based fungicides. Fungicides
used control powdery mildew on roses should also work.