Phytopathology 1

Card Set Information

Author:
ameliahardy
ID:
171770
Filename:
Phytopathology 1
Updated:
2012-09-18 19:13:01
Tags:
Phytopathology
Folders:

Description:
Phytopathology
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user ameliahardy on FreezingBlue Flashcards. What would you like to do?


  1. Define Phytopathology
  2. What percentage of crop yield is lost due to disease?
    How much does this cost?
    14%, $220bil/year
  3. Define Commensalism
    +/O
  4. Define Synergism
    +/+ benefited but not necessary
  5. Define Mutualism
    +/+ required
  6. Define Neutralism
    No direct effect on either organism
  7. Define Amensalism
    -/O one inhibits the other
  8. Define Competition
    -/-
  9. Define Predation
    +/- predator eats whole organism(large scale)
  10. Define Parasitism
    +/- Parasite feeds from organism (small scale)
  11. Define a Parasite vs. a Pathogen
    • Parasite- Derives nutrients from host, may or may not cause harm
    • Pathogen- Agent that causes disease
  12. Define Disease
    • a physiological malfunction
    • a continuous state
    • many causes
    • shows symptoms
  13. define disease vs. damage
    • damage- short term, mechanical(insect feeding, wind, hail)
    • disease- long-term, disturbance of plant metabollism, caused by parasites or suboptimal conditions
  14. Infectious disease
    biotic pathogens including organisms and bioligical molecules
  15. non-infectious disease
    abiotic or genetic nutrient deficiency, toxicity, genetic abborations
  16. what are the 3 components of the disease triangle
    • susceptible host
    • condusive environment
    • pathogen
  17. define biotroph
    • requires a living host to grow and reproduce
    • do not compte in environment
    • obligate parasites
    • most cannot be grown in pure culture
  18. Semi biotrophs
    • primarily on living hosts
    • also capable of living in dead host or organic matter
    • 2 stage life cycle
  19. Necrotrophs
    primarily on dead organic matter, also able to colonize
  20. soil inhabitants
    • grow and reproduce in soil
    • good competator
  21. soil survivor
    • survive in soil
    • poor competators
  22. What is the Anna Karenina Principle?
    Many factors must be in place for a system to work, if one factor is missing the system wont work
  23. what percentage of plant problems are abiotic?
    50%
  24. define diagnosis vs. proof
    • diagnosis- based on associations, and confidence levels vary
    • proof- when koch's postulates are met

What would you like to do?

Home > Flashcards > Print Preview