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Tree Diagnosis
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If you see a large elm tree with yellowing and flagging leaves, describe the three diseases it may have. How would you diagnose what was affecting the tree? What information would permit you to make a decision on what disease the tree has? Explain how insects vector two of those diseases. Describe the insect's life cycle, how the disease is vectored, how the disease kills the host, and what management is available. If a tree were very valuable, what pesticides would you use to control DED and the beetles?
- If you see a large oak tree with yellowing and flagging leaves, describe the diseases it may have. Describe oak wilt, how it spreads, what insect vectors it, and what is the management. How would you diagnose what was affecting the tree? What information would permit you to make a decision on what disease the tree has? Explain how insects vector the disease. Describe the insect's life cycle, how the disease is vectored, how the disease kills the host, and what management is available. If a tree were very valuable, what pesticides would you use to control oak wilt? Would you manage twolined chestnut borer?
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