Dutch Elm Disease Sacramento California by suchenfz

VIEWS: 124 PAGES: 19

									         Dutch Elm


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
• Premature leaf drop
• Discolored wood
          Not DED Symptoms

• Squirrel damage
• Broken limb
• Cambium layer
  chewed likely by
       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


  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
           DED Resistant Elms
• Ulmus carpinifolia x parvifolia ‘Frontier’
• Ulmus glabra x carpinifolia x pumila
• Ulmus americana ‘Princeton’
• Ulmus americana ‘Valley Forge’
• Ulmus carpinifolia x glabra ‘Pioneer’
• Ulmus japonica x wilsoniana ‘Accolade’
• Ulmus wilsoniana ‘Prospector’
 Ulmus carpinifolia x parvifolia
3705 4th Avenue
    Ulmus glabra x carpinifolia x
        pumila ‘Homestead’
4533 T Street
             Ulmus americana

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

4648 T Street
    Ulmus japonica x wilsoniana
5417 T Street
             Ulmus wilsoniana
310 11th Street
             What can we do?
Plant for the…
                     For further information
                       Sacramento Tree
                    Web: www.sactree.com
                      Phone: 916-924-8733


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