If you do not have these plants in a greenhouse,you most likely still can use some of these tips.
Disease Management/Gray mold
Control the Environment
http://ohioline.osu.edu/hyg-fact/3000/3070.html
If there is one practice that will go a long way toward the management of gray mold, it is controlling the environment.
Maintaining an environment within the greenhouse that will
not permit the fungus to grow and sporulate is essential to control.
By keeping the relative humidity below 85%, as well as maintaining good air circulation and adequate plant spacing, excellent control can be achieved.
Whenever possible, plants packed closely together should be spread apart to allow better air circulation and to reduce relative
humidity within the plant canopy. Fans should be used to provide good air movement above the canopy.
Plants with wounds should be either protected with a fungicide or removed from the greenhouse, as the wound is the perfect environment for the fungus to initiate the infection process.
Sanitation
Infected plant material should be removed from the greenhouse so that it is not a source of inoculum for the rest of the house. Infected plant material should not be allowed to sit in trash cans within the house as the fungus will continue to grow and sporulate on the dead and dying tissue.
Subsequent opening and closing of the trash cans will produce
enough air movement to release spores out into the greenhouse.
Fungicide Treatments
There are a variety of labeled fungicides that will offer good control of gray mold disease in the greenhouse.
Products such as Cleary's 3336, Domain, (Thiophanate-methyl),
Phyton-27, Kocide 101, (Copper-based compounds), Chipco 26019, (Iprodione), and ExothermTermil, Daconil 2787, (Chlorothalonil), are all products labeled for the control of this
disease.
You should contact Extension specialists in your state for the chemical treatment that may be right for your particular situation.
