| PLANT |
PEST |
ACTION |
| Andromeda |
Andromeda Lacebug |
Inspect underside of new growth for nymphs. Treat
with registered pesticide if needed. |
| Azalea |
Azalea sawfly |
Inspect foliage. Pest eats all but the main vein
of the leaf. |
| Beech |
Woolly Beech Aphid |
Treat early before natural enemies arrive. |
| Birch |
Aphids |
Check for natural enemies before making treatment
decision. |
| Black Locust |
Locust Leafminer |
Attacks upper leaf surface. Avoid treatment during
bloom. |
| Boxwood |
Boxwood Leafminer |
Check yellow traps for small orange flies, look
for leaf spots with empty brown pupae protruding from the underside.
Treat if detected. |
| |
Boxwood Mite |
Inspect for reddish nymphs on underside of leaves.
Soaps and oils may require multiple applications. |
| |
Boxwood Psyllid |
Inspect tips of new growth for waxy
nymphs. Treatment may be too late to prevent damage. |
| Dogwood |
Dogwood Borer |
Inspect trunk and large branches for holes and
fresh sawdust. Destroy by hand or treat with nematodes. |
| Elm |
Elm Leaf Beetle |
Treat foliage when larvae or skeletonizing is
detected. Trunk applications kill migrating larvae. |
| |
Elm Leafminer |
Last chance to treat with registered
pesticide if needed. |
| Euonymus (deciduous) |
Euonymus Caterpillar |
Euonymus caterpillar Inspect tips
for yellow larvae and silk. Young larvae vulnerable to B.T.
or other registered pesticide. |
| Hardwoods |
Cankerworms |
Last chance to treat with registered
pesticide if needed. |
| |
Gypsy Moth |
Last chance to treat with registered
pesticide if needed. |
| |
Oystershell Scale |
Look for white crawlers on newest
growth. Treat with registered pesticide if needed. |
| |
Two-Spotted Spider Mite
|
Shake branch over white surface.
|
| Hemlock |
Hemlock Woolly Adelgid |
Inspect for cottony masses at base of needles
and crawlers on twigs. Treat with registered pesticide. |
| Holly (American) |
Native Holly Leafminer |
Install yellow sticky traps. Inspect
traps for small gray flies. Treat with registered pesticide
if needed. |
| Honeylocust |
Honeylocust Plant Bug |
Shake branch over white surface. Look for small
green nymphs. Treat with registered pesticide if needed. |
| Larch |
Larch Casebearer |
Tiny dark-winged moths fly when branch is shaken |
| Needled Evergreens |
Spruce Spider Mite |
Shake branch over white surface. Look
for tiny reddish mites. Treat with registered pesticide if needed.
|
| Pine (Hard) |
European Pine Sawfly |
Last chance to handpick or treat with
registered pesticide if needed. |
| |
Pine Needle Scale |
Inspect needles for red-orange crawlers.
Treat with registered pesticide if needed. |
| |
White Pine Weevil |
Inspect leaders for holes, sap
flow and tip curl. Prune out infested leaders before they
turn brown. |
| Pine (Soft) |
Pine Bark Adelgid |
Inspect trunk and branches for white,
cottony masses. Increase vigor, reduce stress. Treat with registered
pesticide. |
|
|
White Pine Weevil |
Inspect leaders for holes, sap flow
and tip curl. Prune out infested leaders before they turn brown.
|
| Willow |
Imported Willow Leaf Beetle |
Inspect for small bluish-black beetles and black
larvae skeletonizing leaves. Treat with registered pesticide
if needed. |
| Yew |
Taxus Mealybug |
Inspect interior of plants for small mealybugs.
Treat with registered pesticide if needed. |
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