Ornamentals – Trees (H-O)

Diseases

• Horsechestnut: Leaf scorch

Diseases

• Laurel: Physiological shothole

Insects

• Laurel: Carnation tortrix

Diseases

• Linden(Tilia): Leaf scorch (marginal leaf necrosis)

Insects

• Linden(Tilia): Leaf galls
• Linden(Tilia): Linden aphid

Diseases

• Madrone: Collar rot (Phytophthora)
• Madrone: Leaf blight
• Madrone: Leaf gall
• Madrone: Leaf spot
• Madrone: Madrone canker

Insects

• Madrone: Madrone leafminer
• Madrone: Shield bearer

Diseases

• Maple: Anthracnose
• Maple: Bacterial leaf spot and dieback
• Maple: Fasciation
• Maple: Leaf scorch
• Maple: Nectria canker
• Maple: Phyllosticta leaf spot
• Maple: Powdery mildew
• Maple: Tar spots
• Maple: Verticillium wilt

Insects

• Maple: Aphids
• Maple: Cottony maple scale
• Maple: Maple bladdergall mite

Diseases

• Mountain Ash: Fire blight
• Mountain Ash: Nectria canker

Insects

• Mountain Ash: Aphids
• Mountain Ash: Ash borer
• Mountain Ash: Leaf blister mite
• Mountain Ash: Mountain ash sawfly

Diseases

• Oak: Anthracnose
• Oak: Armillaria root rot
• Oak: Leaf scorch
• Oak: Mistletoe
• Oak: Sudden oak death

Insects

• Oak: California gallfly
• Oak: Jumping oak gall
• Oak: Leaf galls
• Oak: Oak leaf phylloxera
• Oak: Oak ribbed casemaker
• Oak: Oak treehoppers
• Oak: Pit scale
• Oak: Stem galls
• Oak: Western oak looper