Keeping
Your Rose Garden Free of Disease
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.
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