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Entomology 4015:
Ornamentals and Turf Entomology
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Web Quiz 10: Tree Insect Diagnosis |
| Quiz
10 Instructions |
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From your readings on the websites below
and other websites, please answer the following questions.
Answer the questions in an email message and put your name and quiz #
in the email message subject. Answers should be emailed to pests@umn.edu.
All enclosures must be labeled "last name, quiz #.doc or "last name,
quiz #.rtf." Students may not copy each other's answers, although they
are encouraged to discuss the assignment with their classmates. Please
do not copy and paste text from the websites; instead, paraphrase or
summarize your answers. Answers that appear too similar, or appear to
be copied, will be given a grade of 0 that cannot be dropped. |
| Quiz
10 Questions |
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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?
(5 pts)
- 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?
(5 pts)
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10 Online Resources |
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Tree Insect Diagnosis (CUES)
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How to Differentiate Dutch Elm Disease
From Elm Phloem Necrosis (USDA Forest Service)
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How to Identify and Manage
Dutch Elm Disease (USDA Forest Service)
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How to Identify, Prevent, and Control Oak Wilt (USDA Forest
Service)
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Insect and Mite Control on Woody Ornamentals and Herbaceous
Perennials (Ohioline Bulletin 504)
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Diseases of Deciduous Trees: Elm - Bacterial Wetwood (CUES)
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Tree Injections and
Implants (Harrell: University of Nebraska)
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Nitidulid Beetles
European Elm Bark Beetle
Twolined Chestnut Borer
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