Viticulture Ch 7 Flashcards
Name 5 activities of grapevine management
Winter Pruning Shoot thinning Summer pruning shoot devigoration Leaf removal Trellis system changes
Name 2 overhead pergola systems
Parral
Tendone
Geneva double curtain
Lyre system
What are the 4 rules of canopy management
measurement of canopy quality
pruning the vine in relation to the weight of the wood produced by the vine
Trellis design
Annual canopy management
What is the Ravaz index?
A ratio of yield of grapes to weight of wood produced
What are two factors that effect the fruiting potential of an individual bud?
Position on the cane
Weather conditions while it is growing
What is the french term for straddle tractors?
en-jambeur
What are the height limitations for machine harvesters?
400mm from the ground to 1.75m from the ground
What is the essential point about pruning?
Fruiting buds for the coming season are all positioned on a cane as opposed to spurs
Name two advantages of cane pruning
All buds on one year old canes
Away from older more disease prone wood
evenly spaced not too crowded
can be bent into an arch to interrupt sap flow
What is a spur
A short stub of wood usually holding a number of very short pieces of cane
Name 3 advantages of spur pruning
Number of retained fruiting buds is higher
number of buds can be increased or decreased at annual pruning
Larger yield can = greater row width
larger number of buds = more shoots and bunches = tends to depress overall vigour of the vine
What are 2 disadvantages of spur pruning
Buds near older wood prone to fungal disease
cropping potential too high for vines in regions with the possibility of adverse weather during the ripening period
What is a synonym for Sultana
Thompson Seedless
What is minimal pruning
minimal pruning or zero pruning is leaving the vine to its own devices. This actually results in a stronger vine as pruning actually harms the vine and weakens it rather than strengthens it.
What is the most common form of pressure treatment?
CCA (copper-chrome-arsenate) usually stains timber with a light green
