KEY PESTS - KEY PLANTS

Barbara J. Bromley, Mercer Co. Horticulturist 98

The following KEY PESTS occur frequently and cause damage to plantings:

COLEOPTERA (beetles and weevils)

weevils (black vine, Japanese, white pine)

beetles (Japanese, Asiatic garden, Oriental)

HEMIPTERA (true bugs)

lacebug

HOMOPTERA (aphids, scales, adelgids)

adelgids (wooly hemlock, Cooley gall, spruce gall)

aphids

scale insects

LEPIDOPTERA (moths and butterflies)

bagworm

borers (clearwing borers of rhododendron, peach, lilac, ash, dogwood)

caterpillars (gypsy moth, cankerworm, tent, fall webworm)

Nantucket pine tip moth

HYMENOPTERA (bees, ants, wasps, sawflies)

pine sawfly

leafminer (birch)

DIPTERA (flies)

Leafminer (holly, boxwood)

Other Arthropods

mites (spruce, spider, eriophyid)

In the landscape the following KEY PLANTS attract damaging pests and diseases. Not all varieties and species within a genus may be affected.

arborvitae (Thuja ) esp. bagworm, mites, deer

birch (Betula . esp. white barked) esp. leaf miner, bronze birch borer

dogwood (Cornus , esp. florida) esp. borers, discula and spot anthracnose, phytophthora crown canker

euonymus (Euonymus ) esp. euonymus scale, aphids, deer damage

crabapple (Malus ) esp. scab, rust, fireblight, Eastern tent caterpillar, deer

juniper (Juniperus . esp. mites, bagworm, tip blight, juniper scale

pine (Pinus ) esp. (on 2 needle pines) pine sawfly, Nantucket pine tip moth, pine needle scale, botryiosphaeria canker; (on 5 needle pines) white pine weevil, giant aphid, white pine bark adelgid

cherry et. al (Prunus) esp. Japanese beetle, black knot, peach tree borer

azalea (Rhododendron ) esp. azalea bark scale, lace bug, vole

rhododendron (Rhododendron ) esp. rhodo. borer, black vine weevil, lace bug, rhodo. tip midge, phytophthora and botriosphaeria canker,

hemlock (Tsuga canadensis and T caroliniana) esp. hemlock wooly adelgid, mites, fiorinia and hemlock scale

Also:

maple (Acer) esp. scale, cankerworms, aphids

boxwood (Buxus) esp. boxwood psylla, mites, canker

holly (Ilex) esp. leaf miner, mites

spruce (Picea) esp. mites, gall adelgid, cytospora canker, white pine weevil, bagworm

oak (Quercus) esp. galls, gypsy moth, cankerworm, mites, anthracnose, scale

yew (Taxus) esp. black vine weevil, scale,

elm (Ulmus) esp. leaf beetle, bark beetle, various diseases

roses (Rosa) esp. black spot, powd. mildew, aphids, thrips, Japanese beetles

 

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