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American Fruit Grower Editor David Eddy says science is about building, and in specialty crops, we’ve got some faults in the foundation.

For California AG today, I'm Mike Stephens. We continue with John Roncoroni Weed Science Farm Advisor, Emeritus, UC Cooperative Extension Napa Valley, specializing in weed control and cover crops. Also, his expertise is in IPM weeds affecting plants and wine grapes, to name a few. He continues with the guidelines of growing grapes and understanding the biology of the weeds.<p>This is pretty much taken from the U.S. guidelines for growing grapes. When the harvest is first leaf drop by break, we're Asian, so I put this in dependable precipitation for incorporation with a question mark we n...

California AG today. I'm Mike Stephens. John Roncoroni Weed Science Farm Advisor, Emeritus, UC Cooperative Extension, Napa Valley, specializing in weed control, vegetation management in perennial crops, cover crops and aquatic weed control. Also, his areas of expertise are in plants and their systems and wine grapes to name a couple. He recently describes that there are very few herbicides available to use to know your crops and to think about the biology of the weeds.<p>We think that glyphosate is safe, but the winery says no. So what do we do? This is the question. I get a lot What do ...