The Guide To Treating And Caring f\For Your Roses
Commonly known simply as The Black Spot, the small circular black spots with fringed edges cause leaves to yellow, and being that they are signs of a disease. Leaving the affected leaves on the plant can allow the disease to spread, so you should remove the infected foliage and pick up any fallen leaves around the rose. Artificial sprays may be used to prevent or treat it.
If you notice that the leaves on your rose plants start to curl and turn purple, you should check the leaves and canes for a white powder, as these may be signs of a fungal infection known as powdery mildew. Spread by the wind, it may cause the canes to become stunted or malformed. Treat using Funginex or Benomyl.
Known as rust, this disease is characterized by orange-red blisters that turn black in fall. It can survive the winter and will then attack new sprouts in the spring. Collect and discard leaves that are infected in fall. A Benomyl or Funginex spray every 7-10 days may help.
If you start to see yellow, red, or green spiders on the undersides of the leaves on your roses, you have spider-mites, which will suck the juices form the leaves the longer they are there. they are easily detected by spotting the leaves and flowers that are stunted or malformed. You can use Isotox or Orthene to aid you in treating this infestation.
If you happen to see that the leaves are mottled or have small white webs under them, these are caused by aphids. These small soft-bodied insects that are usually brown, green or red. Often clustered under leaves and flower buds, they suck plant juices from tender buds. Malathion or diazinon spray may help roses to survive these bugs.
If you see that your flowers don’t open, or notice that they are deformed when they do open, Thrips are to be found as the cause. The slender brown-yellow bugs have fringed wings also are found sucking the juices from the plant. Remove the affected leaves , and use Orthene or Malathion to treat the problem.
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