Sacramento California Dutch Elm Disease in. What is Dutch Elm Disease (DED)? DED is caused by a...
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Transcript of Sacramento California Dutch Elm Disease in. What is Dutch Elm Disease (DED)? DED is caused by a...
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
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%
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’
Plant for the…
…future!
What can we do?
For further information contact:
Sacramento Tree Foundation
Web: www.sactree.comPhone: 916-924-8733