If indeed the mustard in the vineyards of northern California was first sown by Franciscan monks more than 200 years ago, it is one of the most enduring cover crop success stories ever, at least in the Napa Valley. Due to the unusually warm January we experienced, (and the high 60's low 70's temps we have now), the field mustard (Brassica campestris) is out in full force. It looks beautiful, contrasted against the the still dormant, skeletal looking vines. So beautiful in fact that it inspired a whole festival dedicated just to it. The Napa Valley Mustard Festival, in it's 16th year, attracts the well heeled of the valley's society doyens...the rest of us just live and work here. Ho hum.
There are far superior choices of cover crops that could be planted in the vineyard. Brassicas in general can prove to be a little problematic. For instance, B. campestris, can attract green peach aphids (Myzus persiae) that build up on the mustard during winter and early spring. Although these aphids do not affect vineyards, they may disperse and carry diseases to other crops. Not good. So vineyard managers, cut the mustard, sew some subterranean clovers to smother it out and let the hoity-toity find another weed to celebrate instead.
There are far superior choices of cover crops that could be planted in the vineyard. Brassicas in general can prove to be a little problematic. For instance, B. campestris, can attract green peach aphids (Myzus persiae) that build up on the mustard during winter and early spring. Although these aphids do not affect vineyards, they may disperse and carry diseases to other crops. Not good. So vineyard managers, cut the mustard, sew some subterranean clovers to smother it out and let the hoity-toity find another weed to celebrate instead.
