Hosts and Pests of Nursery Crops

Alder (Alnus)

• Alder flea beetle
• Aphid
• Leafminer
• Western tent caterpillar

Andromeda (Pieris japonica)

• Weevil

Apricot, flowering (Prunus)

• Peach twig borer
• Peachtree borer
• Spider mite

Arborvitae (Thuja)

• Borer
• Cypress tip moth
• Root weevil
• Scale
• Spider mite

Ash (Fraxinus)

• Aphid
• Scale insect

Aspen (Populus tremuloides)

• Leaf blotchminer

Azalea (Rhododendron)

• Azalea bark scale
• Azalea leafminer
• Lace bug
• Obliquebanded leafroller
• Root weevil
• Spider mite

Bamboo (Bambusa and others)

• Aphid
• Bamboo spider mite

Barberry (Berberis)

• Lecanium scale

Beech (Fagus)

• Aphid

Birch (Betula)

• Aphid
• Birch leafminer
• Bronze birch borer
• Oystershell scale

Boxwood (Buxus)

• Boxwood leafminer
• Boxwood psyllid
• Boxwood spider mite
• Scale

Camellia (Camellia)

• Black citrus aphid
• Brown soft scale
• Cottony camellia scale
• Root weevil

Cherry, flowering (Prunus)

• Aphid
• Apple-and-thorn skeletonizer
• Cherry bark tortrix
• Pear sawfly
• Redhumped caterpillar
• San Jose scale
• Shothole borer
• Spider mite

Chestnut (Castanea)

• Shothole borer

Cotoneaster (Cotoneaster)

• Aphid
• Cotoneaster webworm
• Spider mite

Cottonwood (Populus)

• Aphid
• Satin moth

Crabapple (Malus)

• Leafroller and leaftier
• San Jose scale

Daffodil (Narcissus)

• Bulb mite
• Narcissus bulb fly

Dahlia (Dahlia)

• Western spotted cucumber beetle

Daphne (Daphne)

• Lecanium scale

Dogwood (Cornus)

• Brown soft scale
• Oystershell scale

Douglas-fir (Pseudotsuga)

• Aphid
• Coneworm
• Cooley spruce gall adelgid
• Douglas-fir needle midge
• Douglas-fir tussock moth
• Douglas-fir twig weevil
• Sequoia pitch moth
• Silverspotted tiger moth
• Spruce spider mite

Elm (Ulmus)

• Aphid
• Elm leaf beetle
• Elm leafminer
• European elm scale
• Spiny elm caterpillar (mourning cloak butterfly)

Euonymus (Euonymus)

• Euonymus scale

Fir (Abies)

• Balsam twig aphid
• Balsam woolly adelgid
• Bow-legged fir aphid
• Coneworm
• Spruce budworm
• Spruce spider mite

Fuchsia (Fuchsia)

• Fuchsia gall mite

Golden chain (Laburnum)

• Aphid
• Leafminer
• Spider mite

Hawthorn (Crataegus)

• Apple-and-thorn skeletonizer
• Hawthorn aphid
• Leafroller
• Pear sawfly
• Scale insect
• Spider mite

Hemlock (Tsuga)

• Coneworm
• Hemlock adelgid
• Hemlock scale

Holly (Ilex)

• Aphid
• Brown soft scale
• Cottony camellia scale
• Holly bud moth
• Holly leafminer
• Leafroller
• Lecanium scale

Honey locust (Gleditsia triacanthos)

• Honey locust plant bug
• Honey locust pod gall midge

Ivy (Hedera)

• Aphid

Japanese holly (Ilex)

• Spider mite

Juniper (Juniperus)

• Aphid
• Cypress tip moth and allies
• Juniper scale
• Juniper tip midge
• Juniper webworm
• Spider mite

Kinnikinnick (Arctostaphylos)

• Aphid

Laurel, Portuguese (Prunus)

• Carnation tortrix
• Peachtree borer

Lilac (Syringa)

• Lilac leafminer
• Oystershell scale

Linden (Tilia)

• Aphid
• Linden gall mite
• Spider mite

Madrone (Arbutus)

• Madrone leafminer

Maple (Acer)

• Aphid
• Cottony maple scale
• Maple bladdergall mite
• Maple shoot moth
• Western flower thrips

Mountain ash (Sorbus)

• Aphid
• Pear leaf blister mite

Narcissus (Narcissus)

• Narcissus bulb fly

Oak, Garry (Quercus)

• Leaf and twig gall
• Oak skeletonizer
• Pit scale
• Western oak looper

Peach, flowering (Prunus)

• Aphid
• Leafroller
• Peach silver mite
• Peach twig borer
• Peachtree borer
• Spider mite

Photinia (Photinia)

• Aphid
• Root weevil

Pine (Pinus)

• Black pineleaf scale
• Coneworm
• Eriophyid mites
• European pine shoot moth
• Pandora moth
• Pine aphid
• Pine bark adelgid
• Pine butterfly
• Pine needle scale
• Pine sheath miner
• Powdery pine needle aphid
• Sequoia pitch moth
• Spider mite
• White pine weevil

Plum, flowering (Prunus)

• Hop aphid
• Leaf curl plum aphid
• Peachtree borer
• Pear sawfly
• Scale

Poplar (Populus)

• Carpenterworm
• Lettuce root aphid
• Oystershell scale
• Poplar-and-willow borer
• Satin moth

Privet (Ligustrum)

• Lilac leafminer
• Thrips

Rhododendron (Rhododendron)

• Aphid
• Azalea bark scale
• Carnation tortrix
• Lecanium scale
• Rhododendron bud moth
• Rhododendron lace bug
• Rhododendron whitefly
• Root weevil

Rose (Rosa)

• Leafcutting bee
• Leafroller
• Raspberry cane maggot
• Redhumped caterpillar
• Rose aphid
• Rose curculio
• Rose leafhopper
• Rose midge
• Rose sawfly
• Rose stem miner
• Rose thrips
• Small carpenter bee
• Spider mite
• Western spotted cucumber beetle

Sequoia/redwood (Sequoia)

• Juniper scale

Skimmia (Skimmia)

• Spider mite

Spiraea (Spiraea)

• Aphid
• Snapdragon plume moth
• Spider mite

Spruce (Picea)

• Carnation tortrix
• Coneworm
• Cooley spruce gall adelgid
• Douglas-fir tussock moth
• Pine needle scale
• Silverspotted tiger moth
• Spruce aphid
• Spruce bud scale
• Spruce budworm
• Spruce needleminer
• Spruce spider mite
• Webworm
• White pine weevil

Sycamore (Platanus)

• Aphid
• Sycamore scale

Viburnum (Viburnum)

• Bean aphid
• Root weevil
• Viburnum leaf beetle

Willow (Salix)

• Carpenterworm
• Giant willow aphid
• Poplar-and-willow borer
• Satin moth
• Spiny elm caterpillar (mourningcloak butterfly)

Yew (Taxus)

• Cottony camellia scale
• Lecanium scale
• Root weevil
• Spider mite (false)