07
How to Treat and Care for your Roses
Filed Under (gardening) by Steve Williams on 07-05-2009
If you happen to notice small circular black spots, your plant probably has what is known as the Black Spot. The spots have fringed edges, and are a sign of a disease. Artificial sprays may be used to treat the spots, but the affected leaves should be removed from the plant, as remaining leaves will allow the disease to spread to the rest of the plant.
If you notice that the canes of your roses seem stunted or malformed, they probably have a fungal disease known as powdery mildew. Evidence of this is seen on the plant in white powder spread by the wind, and the leaves will start to curl and turn purple. It is best to treat the plant with Funginex or Benomyl to treat this fungal disease.
If you start to see orange-red blisters begin to form on leaves that turn black during the fall, you should collect the leaves that come down in the fall, as they are signs of a disease called rust. Removal of the leaves is important as the disease can survive the winter and attack new sprouts in the spring. Spray with Benomyl or Funginex every 7-10 days.
If the leaves or the flowers of the plant appear to be stunted or malformed, you may have spider-mites living on the rose. They are easily found, yellow, red, or green spiders usually found on the undersides of the leaves, where they proceed to suck the juice from leaves. Use Orthene or Isotox to take care of the infestation.
If you notice mottled leaves, or if the leaves have small white webs under them, chances are it was caused by aphids. The brown, green, or red bugs have a soft body, and are often found clustered underneath the leaves and flower buds, and will also suck juices from tender buds. You can treat this with Malathion or Diazinon spray.
If your flowers don’t open, or are deformed when they open, Thrips could be the reason behind the problem. They are slender, brown-yellow bugs with fringed wings that also suck juices from flower buds. Cut and discard the infested flowers. Orthene and malathion may also treat this problem.


