Small black circular spots on your roses' leaves, with fringed edges, are signs of a disease known as the Black Spot. It is usually best to remove the affected leaves, and not to allow any to remain on or around the area surrounding the flowers, as they may cause the disease to spread to other plants. Artificial sprays may be used to treat this.
If you start to see a white powder on the canes of the roses, or if they seem stunted or malformed, they may have what is knows as powdery mildew. This fungal infection of the flowers is spread by the wind, and can cause the leaves to curl and turn purple. Funginex or Benomyl can be used to treat this.
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 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 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 appear deformed when they open, or if they don't open at all, you could have Thrips at the source of the problem. The slender brown-yellow bugs with fringed wings can also be found sucking away at the juices of the leaves. Use Malathion and Orthene to treat. - 30234
If you start to see a white powder on the canes of the roses, or if they seem stunted or malformed, they may have what is knows as powdery mildew. This fungal infection of the flowers is spread by the wind, and can cause the leaves to curl and turn purple. Funginex or Benomyl can be used to treat this.
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 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 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 appear deformed when they open, or if they don't open at all, you could have Thrips at the source of the problem. The slender brown-yellow bugs with fringed wings can also be found sucking away at the juices of the leaves. Use Malathion and Orthene to treat. - 30234
