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Popcorn Zea mays var praecox

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					Popcorn and Ornamental Corn
              Key points
                   Popcorn
                    characteristics
                   Growing popcorn
                   Harvesting & shelling
                   Popping
                   Ornamental corn
                   Problems
Popcorn (Zea mays)
              Introduction
                 Was probably the
                  __________ type of
                  corn to be consumed
                     Began in _____________
                      region of South America
                     Also widely used by
                      North American natives
                 Actually a type of flint
                  corn
    Characteristics of Popcorn
   Generally has        ________________   ears
       May be 2 to 3 ears per stalk
       Comes in a range of colors
            Red, blue, _______________, purple, orange
            Standard cultivars are
             yellow or white
   Popcorn can be grown
    both for popping or as
    an _________________
Popcorn Kernels
   Pointed at the __________
        and apex
   Very hard endosperm
   Have _________ pericarps
   _______________ content very important
    for good popping
       When heated the water expands
       Causes kernel to turn itself inside out
Growing Popcorn




   Plant in _____- _____ when soils have
    warmed
       Popcorn has slow ___________ and seedling
        growth
Growing Popcorn
   Pollination
       Plant in _________________ to ensure good
        pollination
       Not necessary to isolation from other types
        of corn
   If popcorn sheds ______ at same time
    as sweet corn, sweet corn quality can
    be reduced
Popcorn Harvesting
                        Ears must reach full maturity
                        Allow ears to remain on
                         plants until they reach about
                         _______% moisture (about
                         first frost)
                        Harvest ___________ and
                         remove husks
                        Store ears for about 3 weeks
                         in a sheltered, dry place,
                         outdoors
                             Well ventilated to avoid
                              mold
                             Brings moisture content
                              down to ~____%; ideal for
                              popping
Hand-shelling popcorn
   Remove kernels from
    the ear by a vigorous
    _______ motion against
    your hands
   Store the kernels in
    ________ containers
   Popping ______ critical
    – ______ of popped
    corn from given weight
    of _______ kernels
        Popping
   __________ integrity is of
    utmost importance
       It is like a pressure vessel
            Heat _________ the moisture
            Steam provides the driving force
             for _________ of the kernel
   Popping occurs when the
    _______ ruptures
       Rupture should not occur until
        ________ lbs per sq. inch of
        pressure is applied
Popping
   Poor popping
       Often occurs if moisture content is too low
            Without proper storage, popcorn will dry to _______%
             moisture, which is too low for good popping
            Can increase moisture by adding one tablespoon of
             water per ____________ of popcorn, shaking, and
             sealing in a container
       If pericarp is broken, popping quality is greatly
        __________________
       If popcorn is “chewy” after popping then too much
        _________
Popcorn as a food
   Nutritionally _________
    popcorn is one of best
    snack foods
   Popcorn contains:
        More _________ and
        protein than a similar
        weight of whole wheat
        bread
       67% as much _______,
        110% as much iron, and
        as much ______ as equal
        amount of beef
   Added oil and salt
    lowers nutritional value
Ornamental Corn
                 New ornamental corns
                  have________ in their
                  parentage
                     Smaller ear size
                 Plant in mid-to-late May
                  for mid- _______
                  harvest
                 Can find cultivars with
                  _________ stalks,
                  husks, and kernels
Ornamental Corn
   Harvest ears when
    ________ is dry and
    ears beginning to dry
    down
   Pick ears carefully so
    ________ not damaged
   Pull husks back – so
    _____ and ears dry
    quickly
   Tie ears together into
    bunches
     Problems of popcorn and
     ornamental corn
   Stalk standabilty and
    ear ______ important
       Insect problems
        _________ to sweet corn
       Damage from corn
        earworm, European corn
        borer, & corn _________
       Diseases – stalk rots &
        ear molds

				
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posted:7/27/2011
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