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 Environment
plays a major role in powdery mildew development. The
disease occurs during cloudy, humid conditions when
days are warm and nights are cool. This usually happens
in mid-summer in Nebraska. And, it is happening again
this year.
Powdery
mildew is the name for the grayish white powdery coating
and masses of spores growing on plant leaves, shoots
and flowers.
Lilac,
zinnia and many other flowers and shrubs can be damaged.
Plants infected with powdery mildew usually don't die
- but they certainly don't look very attractive. Damage
ranges from an unsightly white powdery coating on the
foliage to malformation of leaves, destruction of flowers
and stunted plant growth.
Powdery
mildew is one of the oldest recorded plant diseases.
Theophrastis first noted powdery mildew on roses in
300 B.C.
Resources:
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