Nursery Tree Disease and Pest Diagnosis


Nursery Growing Conditions


Bare root, coastal
Container, coastal
Bare root, transition zone
Container, transition zone
Bare root, interior
Container, interior 

(The Conditions were developed by the writers from

HOST SPECIES (select one)


True Fir (Abies spp.)
Western Larch (Larix occidentalis)
Lodgepole or Shore Pine (Pinus contorta)
Englemann Spruce (Picea englemanii)
White Spruce (Picea glauca)
Douglas-fir (Pseudotsuga menziesii)
White Pine (Pinus monticola)
Ponderosa Pine (Pinus ponderosa)
Sitka Spruce (Picea sitchensis)
Western Hemlock (Tsuga heterophylla)
Mountain Hemlock (Tsuga mertensiana)
Western Redcedar (Thuja plicata)

SEASON, AGE (select one)

Early spring 1+0
Late spring 1+0
Early summer 1+0
Late summer 1+0
Early fall 1+0
Late fall 1+0
Winter 1+0

Early spring 2+0
Late spring 2+0
Early summer 2+0
Late summer 2+0
Early fall 2+0
Late fall 2+0
Winter 2+0

Signs and Symptoms


Insects or insect damage above root collar
Insects or insect damage at or below root collar

Needle Damage

Needles dead
Needles cast
Needles wilted
Needles twisted
Brown needles
Purple needles
Orange needles
Chlorotic needles

Shoot Damage

Dead shoot
Dead leader
Stunted shoot
Shoot is rotten
Dead leader and dominant lateral
Shepherd's crook or crozier-leader
Shoot is toppled over at the ground line

Root Damage

Dead primary root
Stunted Primary Root
Stele is discoloured
Root system is rotten
Root system is swollen
Club-tipped primary root
Only a few deformed lateral roots
Root bark and cortex easily stripped
Root system lacks actively growing white tips
Root system is dead
Root system is stunted
Root system is deformed
Root system is discoloured

Additional Signs and Symptoms

Fungal moulding
Mass of grey mycelium
Gall on stem or branches
Swelling on stem or branches
Black fruiting bodies in stem cankers
Sunken appearance on stem or branches
Rotten stem above and below groundline
Butterscotch-coloured bodies on base of needle
Dense mat of whitish-brown mycelium on lowermost stems
White spores on stem
Stem or needle lesions
Tan or watery-brown lesions
Yellow-orange pustules on needle