TOFG-all

(Marcin) #1

Propagation/Greenhouse Management


Part 1 – 138 | Unit 1.3
Assessment Questions Key



  1. What pieces of information are commonly
    documented in the propagation process and
    why?



  • Genus and species of crop

  • Variety of crop

  • Date sown

  • Date pricked out (if applicable)

  • Seed company name

  • Seed lot (year seed was produced for)


Why: The above would provide adequate
information for future trouble shooting and
the selection of crops during variety trials



  1. What is the “hardening off ” process?


The gradual exposure and acclimation
of greenhouse-raised transplants to the
environmental conditions of the field.



  1. List two characteristics of cell-tray-grown
    seedlings at transplanting maturity.



  • Second set of true leaves initiated

  • Root knit



  1. List two necessary steps for preparing
    seedlings before transplanting them to the
    field or garden.



  • Pre-moistened to 75% field capacity

  • Hardened-off for 3–21 days



  1. List the environmental conditions most
    favorable for the successful bare-root
    transplanting/ pricking out seedlings grown
    in a flat format.



  • Low light levels

  • Low temperatures

  • Low wind velocity



  1. Describe four preventive measures and two
    active measures used to control fungal plant
    pathogens in greenhouse facilities.


Preventive measures:



  • Proper sanitation of propagation media,
    facilities, and containers

  • The selection and use of disease-resistant
    varieties

  • The selection and use of climate-appropriate
    varieties

    • The use of disease-free seed stock

    • Management of environmental conditions
      of greenhouse (air circulation, temperature,
      light) and propagation media (moisture,
      aeration, nutrients) within the optimal range.
      Good cultural practices.

    • Monitoring
      Active measures:

    • Roguing affected crops

    • Biological control

    • The use of acceptable chemical controls



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