SLIDE 1 TREE CARE 101
Bob Layton, American Forest Management
CITY OF SAMMAMISH URBAN FOREST MANAGEMENT PLAN PUBLIC EDUCATION WORKSHOP #3
SLIDE 2 TREE CARE 101
Best management practices for home tree care Identifying and managing tree disease How to identify and manage native species Tree selection for different types of sites
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Best Management Practices for Home Tree Care
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Trees don’t like changes to their environment
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Drought Stress
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Raising the grade around trees kills roots
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So does lowering the grade
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Sunscald
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Sunscald-Summer and Winter
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White Trunk Wrap
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Sapsucker Damage
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Soil Compaction
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Pruning
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Structural Pruning
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How to correctly make a pruning cut
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Here’s the process
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What you don’t want to happen
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Protect the branch collar and bark ridge
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Tree Planting
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Tree Staking after Planting
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Tree Staking
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IDENTIFYING AND MANAGING TREE DISEASE
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Powdery Mildew
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Brown Rot
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Verticillium Wilt
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Anthracnose
SLIDE 29 How to Manage for Fungal Disease - Cultural
Cultural Methods Prune out dead or infected branches Rake and destroy fallen leaves from spring to fall Don’t let irrigation wet the canopy (leaves) Choose disease resistant cultivars Chemical Develop a spray program based on the species. This will take several applications at the right times of year
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Insects/Pests
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Hemlock Woolly Adelgid
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Cooley Spruce Gall Adelgid
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Douglas fir Sequoia Pitch Moth
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Douglas fir Sequoia Pitch Moth
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Bronze Birch Borer
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BBB
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Bark Beetle Galleries
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Western Tent Caterpillar
SLIDE 39 How to Manage for Pests
Most of our pest issues are aesthetic and not compromising to tree health or longevity, such as aphids, adelgids, pitch moths and tent caterpillars. Significant infestations of aphids and adelgids can be treated with an insecticidal soap purchased from most lawn and garden stores. Remove tent caterpillar infestations by pruning off the limb the nest is attached to and dispose
- f properly (submerge in bucket of soapy water or burn)
Bark beetles normally are a secondary issue and will attack stressed trees only, the exception being the Bronze Birch Borer
SLIDE 40 How to Identify and Manage Native Species
Douglas fir Western hemlock Western red cedar Big leaf maple Black cottonwood Red alder Scouler’s willow, Cascara, bitter cherry, Sitka spruce, Shore pine, Western white pine, grand fir, Madrone, Oregon ash, P. dogwood, P. crabapple
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Douglas fir
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DF Bark
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DF Cone
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Douglas fir Traits
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Branch failures Common
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Cambium Ruptures
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Crooks and Forks
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Susceptible to Root Disease
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Schweinitzii Root Disease
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Laminated Root Rot
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Western Hemlock
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WH bark and foliage
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WH
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WH Traits
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WH – Root Disease
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WH – Frost Cracks
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WH - Mistletoe
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Wester Red Cedar
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WRC
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Cedar Traits
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WRC
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WRC
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WRC – Forked Tops
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WRC
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WRC - Sunscald
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Big leaf maple
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Big leaf maple
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BLM Bark
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BLM Traits
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BLM – problematic forked stems
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BLM – branch failures
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BLM Diseases
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BLM – Kretzschmaria duesta
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BLM – Ganoderma applanatum
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BLM Decline
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Black Cottonwood
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Cottonwood Traits
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CW
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CW
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Red alder
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Red Alder Traits
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RA – Natural Decline
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RA – Nitrogen Fixer
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Tree Selection Guidelines
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Consider Growth Habit and Size
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Consider Rate of Growth
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Consider Tree Form or Growth Traits
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Consider Future Maintenance
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Trees don’t live forever
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Questions?
