| AFFECTING LEAVES: |
|
CONDITION
|
CAUSE
|
 |
Caterpillars
chewing on leaves |
Fruittree leafroller (Archips
argyrospila)
|
|
Leaflets
distorted into thickened pods |
Honeylocust podgall
midge (Dasineura gleditschiae)
|
|
Honeydew
appearing on leaves |
Cottony maple scale (nymph
stage on leaves) - (Pulvinaria innumerabilis)
|
|
Leaves
turn bronze, may prematurely drop |
Honeylocust spider mite (Platytetranychus
multidigituli) or Honeylocust
rust mite (Aculops spp.)
|
|
Yellowed
leaves |
Root damage cased by
under or over watering
|
|
| AFFECTING TWIGS AND SMALLER BRANCHES: |
|
CONDITION
|
CAUSE
|
|
Tips of
twigs thickened, may have dieback |
Honeylocust podgall
midge [severe injury killing growing points]
|
|
Scales |
Cottony maple scale (Pulvinaria
innumerabilis)
|
|
Twigs
with small splintering wounds |
Putnam’s cicada [egg laying
wounds] - (Platypedia putnami)
|
|
| AFFECTING LARGER BRANCHES OR TRUNK: |
|
CONDITION
|
CAUSE
|
|
Areas of
dead bark (cankers) or Discoloration and small pimple-like fruiting
bodies (pycnidia) in the bark |
Cytospora canker (Valsa
spp., Leucostoma spp.)
|
|
Amber
colored gummy exudate (gummosis) |
Stress response from
drought, sunscald, collar rot, cankers or other causes
|
