Sacramento California

Dutch Elm Disease

in

What is Dutch Elm Disease (DED)?

• DED is caused by a rapidly spreading fungus

• Invades water conducting system• Restricts water movement• Causing progressive wilt,

die back and eventual death

DED Symptoms• Wilting of leaves• Leaf Curl• Dry, brown leaves• Occasional leaf

yellowing• Premature leaf

drop• Discolored wood

Not DED Symptoms

• Squirrel damage• Broken limb• Cambium layer

chewed likely by squirrels

How the disease spreads!

• European Bark Beetle (Scolytus multistriatus)

• Through root systems grafting to a neighboring tree with DED

Not European Bark Beetle• Elm Leaf Beetle (Xanthogaleruca luteola)

• Defoliates trees but does not carry the fungus which spreads DED

Depicts medium ELB damage

Elm Leaf Beetle (ELB) Damage

Light: = 0-10%Medium: = 20% - 40%Heavy: 50% - 70%Very heavy: 80% -

100%

Identifying mature elms

Leaf Bark

Annual Inspection Professionals

Trained volunteers

What are we doing?• Monitoring all elms for DED• Removing hazardous and infected

elms• Planting DED resistant elms• Monitoring DED resistant elms

progress• Educating and reaching out to the

community

DED Resistant Elms• Ulmus carpinifolia x parvifolia ‘Frontier’• Ulmus glabra x carpinifolia x pumila

‘Homestead’• Ulmus americana ‘Princeton’• Ulmus americana ‘Valley Forge’• Ulmus carpinifolia x glabra ‘Pioneer’• Ulmus japonica x wilsoniana ‘Accolade’• Ulmus wilsoniana ‘Prospector’

Ulmus carpinifolia x parvifolia ‘Frontier’

3705 4th Avenue

Ulmus glabra x carpinifolia x pumila

‘Homestead’4533 T Street

Ulmus americana ‘Princeton’

5412 T Street (tree in forefront)

Ulmus americana ‘Valley Forge’

William Land Park (on golf course, by pond off of 14th Avenue)

Ulmus carpinifolia x glabra ‘Pioneer’

4648 T Street

Ulmus japonica x wilsoniana ‘Accolade’

5417 T Street

Ulmus wilsoniana ‘Prospector’

310 11th Street

Plant for the…

…future!

What can we do?For further information

contact:Sacramento Tree

Foundation Web: www.sactree.comPhone: 916-924-8733