Disease Control

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Author:
wsucoug12
ID:
312311
Filename:
Disease Control
Updated:
2015-12-06 19:46:11
Tags:
Disease Control
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Description:
Disease Control
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  1. What is disease control?
    • the application of practices devised to
    • reduce damage or loss from plant
    • disease
  2. Why is Management or Suppression 
    preferred over Control
    • 1. Total control is often not possible
    • 2. Could be very expensive to
    • achieve and maintain
    • 3. Environmentally not desirable
  3. What is disease Management or Suppression
    • Management or Suppression of the
    • disease at or below a THRESHOLD
    • level is more pragmatic and
    • practical
  4. What is Effective disease control:
    • 1. Accurate diagnosis
    • 2. Timely application of control
    • measures
  5. What are the principles of disease control?
    • 1. Exclusion
    • 2. Eradication
    • 3. Protection
    • 4. Resistance
    • (Whetzel (1929)
  6. Exclusion strategies:
    • Prohibition
    • quarantines & embargoes
    • Interception
    • inspections
    • Elimination
    • certification, treatment
  7. disease control Prohibition:
    • Quarantines & embargoes
    • Federal – Customs at entry points:
    • Tourists and returning residents:
    • -May not carry fresh fruits, flowers,
    • seed or vegetables: will be
    • confiscated
    • -Did you visit a farm during your stay in
    • a foreign country?
  8. disease control Interception:
    • Inspections point of entry, origin, or
    • production
    • Methods of inspection:
    • visual
    • diagnostic tests
    • post-entry grow-out
    • post-entry quarantine
    • third-country quarantine
  9. disease control Elimination:
    • Removal
    • –hand sorting, machine sorting,
    • roguing
    • Treatment
    • –disinfection vs. disinfestation
    • • chemical treatment
    • • heat treatment
    • •Irradiation
    • –disinfection vs. disinfestation
    • Disinfection: removing/eliminating
    • internal infections
    • Disinfestation:
    • removing/eliminating surface borne pests and pathogens
  10. Disease control Elimination:
    • Certification:
    • establishing tolerances
    • field inspections or tests
    • phytosanitary certificate
    • Seed certification programs for
    • potato for viruses
    • Budwood certification progams for
    • tree fruits for viruses
    • Can be very effective in reducing the virus
    • incidence.
    • Why? (hint: how are they spread?)
    • Seed certification programs
    • Potato for viruses
    • Potato virus Y: various tolerance levels
    • Tobacco rattle virus : zero tolerance
    • Potato moptop virus: zero tolerance

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