Dealing with Rose Bush Diseases such as Black Spot on roses, and other fungal diseases such as powdery mildew and rust are considered common place when growing roses.
The following Four rose bush diseases are THE most common.
You can lesson the problem with these rose fungal diseases in a number of ways:
The most prevalent problems with rose plants are Fungal Diseases.
Black Spot ~ Downy Mildew ~ Powdery Mildew ~ Rust
Black Spot, Downy Mildew, and another fungal disease (Anthracnose) are often confused because they look so similar.
The good news is, they are all treated (and prevented) by the same method.
Downy Mildew is the most damaging fungal disease for roses. The name itself confuses people, because it does not resemble down, or mildew.
The dark lesions are more irregular shaped, and often bounded on one side by leaf veins.
This disease is very often confused with black spot, as it has dark spots on the leaves, and the leaves turn yellow and drop off.
Treatment the same as for blackspot..
Black Spot is the number two most damaging rose disease.
It causes dark rounded spots with feathered edges,and yellowing of leaves. It also causes leaf drop that although is not rapid, is persistent.
If untreated, it will defoliate most rose bushes by the end of the season (and possibly spread to other bushes)
Once the bush is defoliated it cannot take in the nourishment it needs to be healthy and strong and able to survive the long winter months ahead.
Remove all infected leaves (including those on the ground).
Powdery Mildew is the easiest to diagnose. It looks like a white powder on the leaves. Or like they were dusted with flour.
Fall is the most common time of year for this fungus; Warm days and cool nights.
Good air circulation with proper spacing between plants can help to avoid it.
You should remove all leaves that are affected to another area of the yard. (Never compost fungus infected leaves.)
Rose rust is spread by the wind, the spores are allowed to enter the leaf tissue through moisture.
The orange to yellow brown spots first appear on the undersides of the leaves. The leaves become deformed, and drop.
Be careful when choosing roses for your garden, as some are particularly susceptible to rust. Learn more about rose rust..
For treating your roses with these rose bush diseases (fungal) problems... Here is a very simple recipe for an all natural organic treatment . Follow This link.