PYRAZINES
Identification
Smell
green grass
green leaves
grape stems
Place of occurrence
vineyard
winery
Cause of occurrence
Harvesting and processing (vinification) of unripe grapes
Incomplete separation of stems from the grape berry
Excessive pressing of whole bunches
Counteraction
Harvesting and processing (vinification) of grapes that have reached physiological ripeness
High quality (complete) separation of stems from the grape berry
Delicate pressing of whole bunches
Thermal treatment of the must