• Like
  • Save
8a Pruning Mature Shade Trees
Upcoming SlideShare
Loading in...5
×

8a Pruning Mature Shade Trees

  • 957 views
Uploaded on

 

More in: Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
957
On Slideshare
0
From Embeds
0
Number of Embeds
1

Actions

Shares
Downloads
0
Comments
0
Likes
2

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Colorado Master Gardener Training Pruning Mature Shade Trees
  • 2. Prune mature trees with a purpose in mind.
    • Crown cleaning
    • Crown thinning
    • Crown raising
    • Crown reduction
    • Hazard reduction
    • Vista clearance
    A good pruning job will not be highly noticeable!
  • 3. Prune mature trees with a purpose in mind.
    • Crown Cleaning
  • 4.  
  • 5. Prune mature trees with a purpose in mind.
    • Crown Cleaning
      • Removed dead, diseased, and broken branches
  • 6. Why dead branches should be removed:
      • Hazard issues
      • Source of disease organisms or insects
        • Fireblight
        • Cytospora
        • Borers
  • 7. When removing dead branches, do NOT cut into callus tissue.
  • 8. Prune mature trees with a purpose in mind .
    • Crown Thinning
  • 9. Prune mature trees with a purpose in mind .
    • Crown Thinning
      • Use natural target pruning cuts (thinning cuts)
      • Focus on branches <2” diameter
  • 10. Prune mature trees with a purpose in mind .
    • Crown Thinning
      • Use natural target pruning cuts (thinning cuts)
      • Focus on branches <2” diameter
    A good pruning job will not be highly noticeable!
  • 11. Prune mature trees with a purpose in mind.
    • Crown Raising
  • 12. Prune mature trees with a purpose in mind.
    • Crown Raising
    • Use natural target pruning cuts , pruning to more upright LARGER laterals or remove branch entirely.
    • Avoid reduction cuts to smaller laterals.
    • 1/2 foliage in bottom 2/3s of tree
  • 13. Prune large trees with a purpose in mind.
    • Crown Reduction
  • 14. Prune large trees with a purpose in mind.
    • Crown Reduction
    • Requires reduction cuts
      • Doesn’t protect the branch defense zone
      • Predisposes branch/trunk to internal decay
    • Avoid crown reduction on trees in stress or decline
  • 15. Prune large trees with a purpose in mind.
    • Crown Reduction
    • Begin pruning as tree starts to reach acceptable size, rather than when overgrown.
    • Remove <1/4 of crown-foliage/year
  • 16. Don’t top trees. Topped trees become structurally unsound for life! Branch tissue when it grows with trunk/parent branch Branch tissue from epicormic growth
  • 17.  
  • 18.  
  • 19. Epicormic shoot
  • 20. Topping > Auxin removal
  • 21. Topping >> the “Don King” look?
  • 22. Prune large trees with a purpose in mind.
    • Hazard Reduction
  • 23. Prune large trees with a purpose in mind.
    • Hazard Reduction
    • Crown cleaning
    • Crown thinning
      • Reduce weight on hazardous limbs
  • 24. Pruning storm damaged trees
  • 25. Pruning storm damaged trees
    • Keep when scaffold branches and trunk have sound wood or can be pruned to sound wood.
    • May accept less than ideal pruning by “mother nature”
  • 26. Pruning storm damaged trees
    • Keep in mind
      • Natural target pruning
      • Structural integrity
    • Heavy pruning required?
      • Select less vigorous shoots
      • May require work over 2-4 years
        • < 1/4 of foliage removed per year
  • 27. Pruning old trees with declining vigor
  • 28. Pruning old trees with declining vigor
    • Focus on
      • Weak and failing branches
      • Lowering crown over time
      • Do NOT “top”
  • 29. Pruning root damaged trees
  • 30. Pruning root damaged trees
    • Prune dead and weak branches
      • Carbohydrate reserves in wood help maintain tree’s vigor
      • Allow natural selection of weak branches
    Does the tree need crown cleaning or crown thinning?
  • 31. Utility rights-of-way take priority over a tree’s appearance and health.
  • 32. Utility rights-of-way take priority over a tree’s appearance and health.
    • $1 billion / year
    • General arborist
      • 10 feet from 50,000 volt line
    • Line clearance training
      • 15 feet from 552,000 volt line
      • 2 feet from 15,000 volt line
  • 33.  
  • 34. Aspen
  • 35. Crabapple
  • 36.  
  • 37.  
  • 38. How should you prune a mature tree?
  • 39. A tree’s structural integrity is set for life by the training it receives while young.
  • 40. U-prune with laser pointer
  • 41. How did you do?
  • 42.