Onion couch

Auricles absent, bulbous base present slightly Onion couch hairy leaf blades tufted habit. 

The very early ripening time of winter barley makes it easier to control perennial weeds nsing pre-harvest glyphosate. This is especially the case with onion couch which senesces earlier than common couch (Chapter 5). 

Tall oat grass is another very cotmnon grass of permanent pastures and hay meadows, and, as onion couch, it is also an important weed of arable land. Common couch occurs widely in permanent pastures and arable land but is less of a problem since the advent of glyphosate-based herbicides. 

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