diagnosing plant disorders introduction to plant science j.g. mexal
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TRANSCRIPT
Diagnosing Plant Disorders
Introduction to Plant Science
J.G. Mexal
Diagnosing Plant Disorders
Verticillium wilt
Dark discoloration
What’s Killing Your Trees
Fire blight
CotoneasterPear
Apple
E. Shannon
What’s Killing Your Trees
Crown gall on pecan
E. Shannon
Gall on Ponderosa Pine
What’s Killing Your Trees
Slime flux
J. Mexal
E. Shannon
Types of ‘Disease’
• Abiotic - Physcial Factors– Temperature– Moisture– Nutrients
• Biotic - Biological– Insect– Disease (Fungi, Bacteria, Virus)– DPD- human
What’s Killing Your Trees
Mistletoe (leafy & dwarf)
J. Mexal
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What’s Killing Your Trees
Lichens
Eriophyid mites on ash
0.01”
What’s Killing Your Trees
Spider Mites
Adult Webbing
Damage USFS
What’s Killing Your Trees
Insects
E. Shannon
Shot-hole borer
Pine Tip-moth
Aphid Predator Egg Masses
Pecan Update Blackmargined Aphid / B. Lewis
What’s Killing Your Trees
Pecan Twig Girdler
What’s Killing Your Trees
Apple Flat Head Borer Larva
Wood Borer
Bob Cain
What’s Killing Your Trees
Insects
Types of ‘Disease’
• Abiotic - Physcial Factors– Temperature– Moisture– Nutrients
• Biotic - Biological– Insect– Disease (Fungi, Bacteria, Virus)– DPD- human
What’s Killing Your Trees
The Biggest Killer of Trees--DPD
It’s still alive, but for how long?
J. Mexal
What’s Killing Your Trees
What are the critical parts of a tree?
Xylem
Bark
Cambium
Things to Know
• Disease triangle
• Types of Disease
• Diseases in New Mexico