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Diagnosing Plant Disorders Introduction to Plant Science J.G. Mexal.

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Presentation on theme: "Diagnosing Plant Disorders Introduction to Plant Science J.G. Mexal."— Presentation transcript:

1 Diagnosing Plant Disorders Introduction to Plant Science J.G. Mexal

2 Diagnosing P lant Disorders Verticillium wilt Dark discoloration

3 What’s Killing Your Trees Fire blight Cotoneaster Pear Apple E. Shannon

4 What’s Killing Your Trees Crown gall on pecan E. Shannon

5 Gall on Ponderosa Pine

6 What’s Killing Your Trees Slime flux J. Mexal E. Shannon

7 Types of ‘Disease’ Abiotic - Physcial Factors –Temperature –Moisture –Nutrients Biotic - Biological –Insect –Disease (Fungi, Bacteria, Virus) –DPD- human

8 What’s Killing Your Trees Mistletoe (leafy & dwarf) J. Mexal

9 ? What’s Killing Your Trees Lichens

10 Eriophyid mites on ash 0.01”

11 What’s Killing Your Trees Spider Mites Adult Webbing Damage USFS

12 What’s Killing Your Trees Insects E. Shannon Shot-hole borer Pine Tip-moth

13 Aphid Predator Egg Masses Pecan Update Blackmargined Aphid / B. Lewis

14 What’s Killing Your Trees Pecan Twig Girdler

15 What’s Killing Your Trees Apple Flat Head Borer Larva Wood Borer Bob Cain

16 What’s Killing Your Trees Insects

17 Types of ‘Disease’ Abiotic - Physcial Factors –Temperature –Moisture –Nutrients Biotic - Biological –Insect –Disease (Fungi, Bacteria, Virus) –DPD- human

18 What’s Killing Your Trees The Biggest Killer of Trees - - DPD It’s still alive, but for how long? J. Mexal

19 What’s Killing Your Trees What are the critical parts of a tree? Xylem Bark Cambium

20 Things to Know Disease triangle Types of Disease Diseases in New Mexico


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