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Dealing with Rose Diseases
To make sure that your prized roses remain in the best of
health, simply follow these tips.
1. Black Spots on Leaves
This disease is commonly known as black spot. Black spots appear
as circular with fringed edges on leaves. They cause the leaves
to yellow. Remove the infected foliage and pick up any fallen
leaves around the rose. Artificial sprays may be used to prevent
or treat this kind of rose disease.
2. Stunted or malformed young canes
Known as powdery mildew, this is a fungal disease that covers
leaves, stems and buds with wind spread white powder. It makes
the leaves curl and turn purple. Spray with Funginex or Benomyl
to treat this fungal disease.
3. Blistered underside of leaves
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.
4. Malformed or stunted leaves and flowers
This is caused by spider mites. They are
tiny yellow, red or
green spiders found on the underside of leaves where they suck
juices. The application of Orthene or Isotox may help in
treating this infestation.
5. Weak and mottled leaves with tiny white webs under them
This is caused by aphids. They are small soft-bodied insects
that 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.
6. Flowers that don't open or are deformed when they open.
Thrips could be the reason behind this 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.
Remember that roses are hungry feeders that require much
fertilizer to become healthy bushes.
About the author:
Find more about gardening
and some useful gardening
tips at About
Gardening
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