Pest Appearance Timetable
February-March-Early April (Dormant Season)
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Aphids (eggs and adults)
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Adelgids (eggs, nymphs, and adults)
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Mites (eggs and adults)
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Scale insects (eggs, nymphs, and adults)
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White pine weevil
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APRIL
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Boxwood leafminer (adults)
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Cankerworms
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Dusky birch sawfly
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Eastern tent caterpillar
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Elm bark beetle
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Hackberry psylla
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Hemlock wooly adelgid
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Juniper webworm
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Lilac borer
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Nantucket pine tip moth
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Northern pine weevil
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Pales weevil
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Pine bark adelgid
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Spruce spidermite
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White pine aphid
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White pine weevil
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MAY
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Aphids and adelgids (several species)
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Armored scales (crawlers of several species
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Azalea lace bug
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Azalea leafminer
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Azalea whitefly bark beetles
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Birch leafminer
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Boxwood psyllid (nymphs)
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Blackheaded ash sawfly
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Bronze birch borer (adults)
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Cankerworms
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Cottony maple scale
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Dogwood borer
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Dusky birch sawfly
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Elm case bearer
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Elm leaf beetle
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European red mite
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Fall webworm
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Gypsy moth
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Hemlock wooly adelgid
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Holly Leafminer
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Honeylocust plant bug
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Imported willow leaf beetle
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Lacebugs (several species)
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Leopard moth
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Lilac borer
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Locust leafminer
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Mealybugs (several species)
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Mites (several species)
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Mountain ash sawfly
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Nantucket pine tip moth
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Narcissus bulb fly
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Oak blotch leafminer
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Oak leaftier
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Peachtree borer
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Pine needle scale (crawlers)
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Pine sawflies
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Pine spittlebug
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Pine tube moth
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Poplar tentmaker
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Rhododendron borer
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Rose chafer
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Southern pine beetle
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Spruce spidermite
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White peach scale (crawlers)
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JUNE
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Aphids
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Arborvitae leafminer
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Ash borer
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Azalea bark scale (crawlers)
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Azalea caterpillar
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Azalea lace bug
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Azalea whitefly
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Bagworm
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Bark beetles
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Black vine weevil
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Boxwood psyllid (adults)
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Bronze birch borer
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Cottony maple scale
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Dogwood borer
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European pine shoot moth
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European red mite
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Fall webworm
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Fletcher scale
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Fourlined plant bug
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Greenstriped mapleworm
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Japanese beetle
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Japanese maple scale (crawlers)
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Juniper tip midge
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Leafhoppers
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Leopard moth
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Lilac borer
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Mimosa webworm
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Mountain ash sawfly
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Peachtree borer
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Pine root collar weevil
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Pine sawflies
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Pine tortoise scale (crawlers)
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Pine webworm
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Plant bugs
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Rhododendron borer
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Roundheaded appletree borer
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San Jose scale (crawlers)
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Soft scales (crawlers of several species)
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Southern pine beetle
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Taxus mealybug
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Terrapin scale (crawlers)
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Wax scale (crawlers)
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White peach scale (crawlers)
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White prunicola scale (crawlers)
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JULY
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Aphids
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Azalea lace bug
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Azalea leafminer
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Bagworm
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Bronze birch borer
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Dogwood borer
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Fall webworm
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Gloomy scale (crawlers)
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Japanese beetle
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Lace bugs (several species)
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Leafhoppers
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Leopard moth
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Locust leafminer (adults)
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Mimosa webworm
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Obscure scale (crawlers)
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Oystershell scale (crawlers)
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Pine needle scale (crawlers)
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Pine sawflies
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Pine tube moth
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Plant bugs
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Rhododendron borer
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Roundheaded appletree borer
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Southern pine scale
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Spider mites
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Twobanded Japanese weevil
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Wax scale
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Whitefly
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AUGUST
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Aphids
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Azalea lace bug
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Caterpillar (several species)
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Cooley spruce gall adelgid
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Fall webworm
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Leafhoppers
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Leopard moth
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Mimosa webworm
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Plant bugs
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Spider mites
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Whiteflies
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White prunicola scale (crawlers)
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SEPTEMBER-OCTOBER
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Banded ash clearwing
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Cooley spruce gall adelgid
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Eastern spruce gall adelgid
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Fall webworm
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Greenstriped mapleworm
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Leopard moth
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Locust borer
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Magnolia scale (crawlers)
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Spruce spider mite
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Tuliptree scale
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Twig girdler and twig pruner
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White peach scale (crawlers)
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White pine aphid
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