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CRAPEMYRTLE
DOES NOT FLOWER WELL
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| Not
Enough Sunlight |
Crapemyrtles
need at least 6 to 8 hours of full sun to flower well |
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| Insufficient
Water |
Crapemyrtles
are very drought tolerant once established, but flowering can be enhanced
with irrigation during extended dry periods |
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| Powdery
Mildew |
See
powdery mildew below |
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| Heavy
Nitrogen Applications |
Trees
that are continually fertilized with nitrogen will put on a lot of
vegetative growth but may not flower as profusely |
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| Low
Fertility |
Crapemyrtles
benefit from an application of a complete fertilizer in early spring
to produce enough energy for growth and flower production |
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| Severe
Pruning |
Heavily
pruned crapemyrtles will put most of their energy into regrowing limbs
and leaves and less energy will go into flower production |
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| Seedling
Volunteer |
Crapemyrtles
produce viable seeds which may sprout and grow in the garden; however,
seedling trees may not have the same flowering characteristics of
the parent plants. |
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PLANTS
ARE STUNTED AND DO NOT GROW WELL |
| Planted
too deeply |
Trees
should be planted so that the top of the root ball is level with
the surrounding soil. If planted too deeply, the roots will not
have enough oxygen for respiration and growth to occur and the tree
will slowly decline |
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| Soil
is too wet |
CrapeMyrtles
are very adaptable to different soil types, but they do require
good drainage for root growth |
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| Soil
is too dry |
Supplimental
irrigation during dry periods should provide adequate moisture for
normal growth. Adding three to four inches of mulch out to the dripline
of the tree will keep the soil from drying out as rapidly |
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| Low
Fertility |
A
soil analysis will tell you the soil pH and fertility levels so
that deficiencies can be corrected. Your local county extension
service may provide this service. |
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| Dwarf
Variety |
There
are many varieties of different mature sizes to choose. Select named
varieties of crapemyrtles and find out their growth characteristics
before purchasing |
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LEAVES
ARE CURLED AND STUNTED, AND A BLACK MOLD MAY BE PRESENT
ON LEAVES, TWIGS AND BRANCHES |
| Aphids |
Encourage
beneficial insects such as lady beetles. Wash aphids from plant
with a forceful spray of water. Use insecticidal soaps or other
environmentally friendly pesticides. Often, a black mold is associated
with the feeding of insects such as aphids which secrete honeydew
(undigested plant sap). This sticky, sugary solution serves as a
food source for the Sooty mold fungus. Sooty mold is not harmful
to the plant and will eventually disappear if the aphids are controlled. |
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LEAVES
ARE EATEN AWAY OR SKELETONIZED (LEAF TISSUE EATEN BETWEEN VEINS)
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| Japanese
Beetles |
Japanese
beetles feed on over 400 species of ornamental trees and shrubs.
Their larvae (grubs) are a severe pest of lawns. There are many
insecticides labeled for control of this pest. Traps will provide
limited use, but do not hang traps on or near plants that the beetles
are feeding. |
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| Leaf
Beetles (Chrysomelidae) |
Other
small leaf beetles will sometimes feed on crape myrtles. The larvae
and the adults will be found feeding on the leaves. There are many
insecticides which will provide control. |
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LEAVES
AND POSSIBLY FLOWERS ARE COVERED WITH A WHITE, POWDERY SUBSTANCE
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| Powdery
Mildew |
Select
varieties that are resistant to powdery mildew. Thin the canopy
of the tree to improved air circulation. Use fungicides labeled
for control of powdery mildew when first noticed in late spring
and repeat applications according to the label directions. |
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LEAVES
ARE SPOTTED. LOWER LEAVES SEEM AFFECTED FIRST. TREE MAY DEFOLIATE
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| Cercospora
Leaf Spot |
This
fungus disease may be a problem in late summer and fall during hot,
humid weather. Fungicides which contain Thiophanate-methyl may be
used to suppress further development of this disease. |
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A
GRAY-GREEN SCALEY OR LEAFY GROWTH APPEARS ON TRUNKS, BRANCHES, OR TWIGS
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| Lichen |
Lichen
are an unusual organism consisting of an algae and a fungus that
function together (symbiotic). They are harmless to the plant that
they are growing upon, but are more prevalent on plants that are
not vigorously growing. Lichens need good sunlight to grow and vigorous
plants will produce many leaves that will shade the twigs and branches
causing the lichen to disappear. |
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| Spanish
Moss |
Spanish
moss is a plant that live above the ground (epiphyte). They are
not a parasite, and do not harm the plants where they are found
other than weighting down the branches and possibly shading out
some leaves. If the moss is objectionable, it can be physically
removed from the tree. |
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