| AFFECTING LEAVES: |
|
CONDITION
|
CAUSE
|
 |
Leaves
being chewed |
Fruittree leafroller (Archips
argyrospila) or Speckled green fruitworm (Orthosia hibisci)
|
|
Small
pouch galls form on leaf surface |
Linden fingergall mite
(Eriophyid mite)
|
|
Velvety
patches on underside of leaves (littleleaf linden) |
Linden fingergall mite
(Eriophyid mite)
|
|
Pale
green or yellow leaves |
Iron chlorosis
|
|
Leaves
strongly cupped |
Herbicide injury. See Abiotic Injury.
|
|
Aphids |
Linden aphid (Myzocallis
tiliae)
|
|
Wilting
and dieback of portions of tree, originating from roots |
Verticillium wilt (Verticillium
spp.)
|
|
| AFFECTING TWIGS AND SMALLER BRANCHES: |
|
CONDITION
|
CAUSE
|
|
Large
cottony insect develops in late spring |
Cottony maple scale (Pulvinaria
innumerabilis)
|
|
| AFFECTING LARGER BRANCHES OR TRUNK: |
|
CONDITION
|
CAUSE
|
|
Areas of
dead bark with discoloration and small pimple-like fruiting bodies
(pycnidia) |
Cytospora canker (Valsa
spp., Leucostoma spp.)
|
|
Wilting
and dieback of portions of tree, originating from roots |
Verticillium wilt (Verticillium
spp.)
|
