There are times in agriculture when too little crop can mean a good thing for farmers and food producers but discouraging news for consumers. (LATimes) - This is where California’s wine industry is now, according to a recent report by researchers at UC Davis’ Graduate School of Management. After California’s wine industry struggled to deal with a glut of grapes in 2003-04, a number of vineyards and growers went out of business because they had too much of a good thing. Now there are signs of a shortage of wine grapes. Blame it on the weather, say researchers. Last spring northern California vineyards struggled through hard rain and a freeze. That, in turn, meant that the weather wasn’t conducive for the plants to get a good start on growing this season's grapes.