Viticulture Chapter 4 Flashcards
Process by which materials are moved from one part of plant to the other
Translocation
Process by which sunlight is converted into sugar
Photosynthesis
Water evaporation through openings in underside of leaf
Transpiration
Process by which sugar is broken down and converted into biological energy
Respiration
Condition where the flowers do not develop grapes. Poor fruit set
“Coulure” or shatter
small inset/rootlouse
Phylloxera
noble rot/beneficial mold
Botrytis Cinera
Powdery Mildew
Odium
Small seedless berries at fruit set
Millerendage
Downy Mildew; fungal
Peronspora
Bacterial disease spread by insects such as the glassy winged sharp shooter
Pierces disease
Long term expected weather; historical average
Climate
Short term forecast of meteorological conditions
wheather
How much rain do grapes need annually
20-30 inches
Optimal soil conditions for grape growing
Nutrient poor with good drainage prevent overgrowth
Soil types smallest to largest
clay, silt, sand rocks
High elevation vs. Valley floor impact on vineyard climate
High-cool, windy, intense sunlight, diurnal temp swings. Valley Floor-water can collect and cause overgrowth-grapes less concentrated.
Describe the effect of water near a vineyard
Moderates temps, possible fog/cloud cover, rain, dampness
At what age do grapes decline in vigor
20
Ideal latitude for the vine
30-50 degrees latitude in both the northern and southern hemispheres
What is the ideal temperature for bud break
50 degrees
Time period from bud break to harvest
140 to 160 days
Guyot method
One cane from each vine is trained in the same direction
What is Cordon vine trainining
Each arm is trained along a wire. Spur training
What is Rudolph Steiner known for
Biodynamic method
