| PLANT |
PEST |
ACTION |
| Andromeda |
Andromeda Lacebug |
Inspect underside of new growth for nymphs. Treat
with registered pesticide if needed. |
| Arborvitae |
Arborvitae Leafminer |
Tiny silver- white moths fly when branch is shaken.
Treat with registered pesticide if needed. |
| |
Fletcher scale |
Treat newly emerged crawlers before
they wax over. This species pupates within the foliage. |
| Beech |
Woolly Beech Aphid |
Nearing the natural end of their cycle |
| Birch |
Aphids |
Check for natural enemies before making treatment
decision. |
| |
Birch Leafminer. |
Treat only if 1st generation damage
was severe to protect new 2nd gen. growth. |
| Boxwood |
Boxwood Leafminer |
Check yellow traps for adult flies,
look for leaf spots with 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.
|
| Catalpa |
Cotton Aphid |
Inspect underside of leaves for green-yellow nymphs.
Look for Lacewing eggs, Ladybugs, and other natural enemies.
|
| Cherry |
White Prunicola Scale |
Treat before crawlers wax over |
| 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 |
| Hardwoods |
Polydrusus weevil |
Check for notching along leaf margins and shiny
metallic green-bronze weevil. Treat with registered pesticide
if needed. |
| |
Two-Spotted Spider Mite |
Shake branch over white surface.
Treat with registered pesticide if needed. |
| Hemlock |
Hemlock Looper |
Shake branches, look for green inchworms dropping
on silk threads. Treat with registered pesticide such as B.T.
if needed. |
| Holly (American) |
Native Holly Leafminer |
Install yellow sticky traps. Inspect
traps for small gray flies. |
| Juniper |
Juniper Scale |
Treat before crawlers wax over |
| Larch |
Larch Casebearer |
Tiny dark-winged moths fly when branch is shaken.
|
| Mountainash |
Mountainash Sawfly |
Examine leaflets in shadiest areas for clusters
of yellow-green larvae. Pick off or treat with registered pesticide
if needed. |
| Oak (Red Group) |
Oak Skeletonizer |
Examine leaves for lacy skeletonizing and small
green larvae. Treat with registered pesticide if needed. |
| 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.
|
| Rhododendron |
Rhododendron Borer |
Check pheromone trap for male moths. Inspect large
lower branches for holes and fresh sawdust. |
| Yew |
Black Vine Weevil |
Place burlap traps under plants by mid-June. |
| |
Taxus Mealybug |
Inspect interior of plants for small mealybugs.
Treat with registered pesticide if needed. |
| |
Fletcher scale |
Treat newly emerged crawlers before
they wax over. This species pupates within the foliage. |
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