Data Enrichment
Pests with GDD Timing
Pests with growing degree day emergence thresholds, sourced from the UMD IPMnet Pest Predictive Calendar and calibrated for Puget Sound conditions.
46 of 239 pests
White pine weevil
630 GDD₃₂ · Bloodroot first bloom · Pissodes strobi
Spruce needleminer
870 GDD₃₂ · Coleotechnites piceaella
Woolly apple aphid
945 GDD₃₂ · Eriosoma lanigerum
Azalea and rhododendron lace bug
963 GDD₃₂ · Stephanitis spp.
Rhododendron lace bug
963 GDD₃₂ · Stephanitis rhododendri
Spruce spider mite
976 GDD₃₂ · Serviceberry first bloom · Oligonychus ununguis
Boxwood psyllid
994 GDD₃₂ · Serviceberry first bloom · Psylla buxi
Codling moth
995 GDD₃₂ · Cydia pomonella
Roseslug
1035 GDD₃₂ · Endelomyia aethiops
Hemlock scale
1044 GDD₃₂ · Hemiberlesia ithacae
Viburnum leaf beetle
1085 GDD₃₂ · Deutzia first bloom · Pyrrhalta viburni
Azalea Lace Bug
1099 GDD₃₂ · Deutzia first bloom · Stephanitis pyrioides
Birch leafminer
1102 GDD₃₂ · Deutzia first bloom · Fenusa pusilla
Elm leafminer
1116 GDD₃₂ · Deutzia-Eastern redbud · Fenusa ulmi
Balsam woolly adelgid
1143 GDD₃₂ · Adelges piceae
Spruce budworm
1160 GDD₃₂ · Choristoneura fumiferana
Boxwood leafminer
1221 GDD₃₂ · Crabapple first bloom · Monarthropalpus flavus
Cooley spruce gall adelgid
1424 GDD₃₂ · Hawthorn first bloom · Adelges cooleyi
Lilac borer
1550 GDD₃₂ · Hawthorn-Black locust · Podosesia syringae
Obliquebanded Leafroller
1575 GDD₃₂ · Choristoneura rosaceana
Holly leafminer
1625 GDD₃₂ · Crabapple full bloom · Phytomyza ilicis
Hemlock woolly adelgid
1733 GDD₃₂ · Red horsechestnut first bloom · Adelges tsugae
Pitch moth
1778 GDD₃₂ · Synanthedon novaroensis
Sequoia pitch moth
1778 GDD₃₂ · Synanthedon sequoiae
Strawberry crown moth
1778 GDD₃₂ · Synanthedon bibionipennis
Honeylocust plant bug
1799 GDD₃₂ · Blue false indigo first bloom · Diaphnocoris chlorionis
Oystershell scale
1958 GDD₃₂ · Tuliptree first bloom · Lepidosaphes ulmi
Bronze birch borer
2141 GDD₃₂ · Smoketree-Fringetree · Agrilus anxius
Black vine weevil
2319 GDD₃₂ · American yellowwood first bloom · Otiorhynchus sulcatus
Twospotted spider mite
2375 GDD₃₂ · American yellowwood full bloom · Tetranychus urticae
Cottony camellia scale
2466 GDD₃₂ · Pulvinaria floccifera
Juniper scale
2563 GDD₃₂ · Japanese snowball full bloom · Carulaspis juniperi
San Jose scale
2644 GDD₃₂ · Goats beard full bloom · Diaspidiotus perniciosus
European pine shoot moth
2660 GDD₃₂ · Rhyacionia buoliana
European elm scale
2946 GDD₃₂ · Japanese stewartia first bloom · Gossyparia spuria
Black pineleaf scale
2990 GDD₃₂ · Nuculaspis californica
Apple maggot
3060 GDD₃₂ · Rhagoletis pomonella
Cottony maple scale
3061 GDD₃₂ · Smoketree-Goats beard full bloom · Pulvinaria innumerabilis
European Fruit Lecanium
3074 GDD₃₂ · Parthenolecanium corni
Dogwood sawfly
3229 GDD₃₂ · Japanese stewartia first bloom · Macremphytus tarsatus
Azalea bark scale
3299 GDD₃₂ · Japanese stewartia first bloom · Acanthococcus azaleae
Peachtree borer
3872 GDD₃₂ · Butterfly bush-Butterfly weed · Synanthedon exitiosa
Pear slug
4323 GDD₃₂ · Caliroa cerasi
Pine needle scale
4822 GDD₃₂ · Goldenraintree full bloom · Chionaspis pinifoliae
Fall webworm
5825 GDD₃₂ · Crape myrtle Natchez first bloom · Hyphantria cunea
Euonymus scale
6390 GDD₃₂ · Crape myrtle Natchez full bloom · Unaspis euonymi