Plant path lab 2

Home > Preview

The flashcards below were created by user wsucoug12 on FreezingBlue Flashcards.

  1. What are most seedling diseases considered?
    Facultative parasites
  2. What three ways do seedling diseases reduce crop stands?
    • -seed rot: seeds are infected before germination resulting in rotting of the seed
    • -pre-emergence dampening off: seedlings are infected and killed before emerging from the soil
    • -post-emergence dampening off: seedlings are infected and killed soon after emerging from the soil
  3. What are the most important genera that cause seedling diseases?
    • They are from the genera pythium and phytophthora
    • - they are considered stramenophiles because they produce zoospores in soil
    • - they also produce thick walled oospores (from meiosis) that serve as the primary survival structure in soil and plant debris
  4. Environmental conditions for seedling diseases
    • -heavy souls
    • -high soil moisture and low temps
    • -basically any environmental condition that is not optimal for growth or stresses the will predispose it to infection
  5. How to control pathogens causing seedling diseases
    • -apply fungicides or biological control agents to seed
    • -heat treat or fumigate greenhouse soil or transplant beds
    • -seeding or transplanting when conditions favor rapid emergence and growth of the crop
    • -breed disease resistant cultivars

Card Set Information

Plant path lab 2
2015-09-24 14:24:12
Plant path lab

Plant path lab 2
Show Answers:

What would you like to do?

Home > Flashcards > Print Preview