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I N S E C T S
Japanese beetle eats the leaves down to the main veins. Leaves at
the top and south side of the plant are most often eaten and attacks can
be quite sudden.
White-marked tussock moth is a fuzzy caterpillar with a yellow body
and red head. The insect has black marks and four tufts of hair on its
back. No chemical control is available.
D I S E A S E S
Leaf blotch causes diseased areas of variable size
on the leaves. The diseased areas are at first discolored and
water-soaked, later turning light reddish brown with bright yellow
margins. If the entire leaf is affected it will dry, turn brown, and fall
off. Leaf stalks may also be attacked. This disease looks very much like
scorch. Rake up and destroy old leaves. No chemical control is
available.
A leaf spot disease will cause small brown circular spots on the
leaves. No chemical control is listed.
Powdery mildew covers the undersides of the leaves with white mold.
Sprays of fungicide should bring the disease under control.
Anthracnose may infect terminal shoots several inches from the tip.
The infected area is shrunken and the outer layers of tissue may be
ruptured.
Leaf scorch is a physiological problem. The leaf margins turn brown
then browning moves progressively inward between the veins. Eventually the
entire leaf turns brown. The condition occurs in mid-summer. Keep the
plant well watered during dry weather.

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