Quiz 1 Flashcards
Explain the basic principle of Plant Pathology
Why did the plant die and what can I do about it?
Who was Anton deBary? What did he prove?
- Father of Plant Pathology
2. Proved that fungus caused leaf blight in potatoes
Break down the Irish Potato Famine 1. 2. 3. 4. 5.
- Gave birth to the science of plant pathology
- Responsible for the first great wave of immigration into America
- Fungus impact on humanity
- Genetic Uniformity
- Distribution of crops
Disease Triangle (3 things need for disease to occur)
Host
Environment
Disease Agent
What are the two types of Casual Agents?
Biotic and Aboitic
Biotic definition
Infectious
organism (pathogen) grows, multiplies, and spreads to other plants (only 10%)
Abiotic definition
non-infectious
environmental conditions that impact plant development (90%) (Injury not a disease)
Give me examples of Abiotic Physical, Chemical, and Mechanical
Physical
- Temperature
- Moisture
Chemical
- Air Polluntants
- Fertilizers and salts
- Pesticides
Mechanical
-everything else
Fungi basic description
Breaks down complex things into simple things
Virus
gets into host, tells host to make copy, Virus message is stronger than cell message, and then tells messager cell to make more copies
Bacteria
Get food from organic material
They are decomposers
Most plants resist/tolerate disease, give some examples.
Tree gasing beetles
spore into tree, tree kills itself around the spore
In order to get a disease, a plant must be what?
- it lacks?
- must have the right what?
susceptible
genetic tools to fight back
environment
What do environmental conditions provide?
examples
1.
2.
They provide the pathogen opportunities
- They influence the host plant conditions
- They increase pathogen virulence
What are the predisosing conditions?
Site (shade)
Weather (rainy)
Management (fertilizing)
