|
Black Spot
(Roses)
 Description: Primarily affects roses. At first, lower leaves
of susceptible plants become covered with brownish black
spots; eventually they yellow and drop off. A severe
infestation can completely defoliate a plant over a
period of weeks. Disease spores are spread by rain and
irrigation; black spot spreads quickly in wet or humid,
warm weather.
Solution: Avoid
wetting foliage. Prune plant to allow good air circulation
among branches. At the first sign of disease, remove
infected leaves and begin using Soap-Shield® Fungicidal Soap,
Liquid Sulfur or Micronized Sulfur on a regular basis
for control. Clean up any dead leaves from the base
of plants (don't compost dead or diseased leaves), especially
in fall.
|
