Hughson, Calif., Nursery Diversifies from Grapevines to Poinsettias.(Originated from The Modesto Bee, Calif.)

HUGHSON, Calif.--Aug. 27--History shows that most agricultural booms are followed by a bust. California's wine industry is no different.

There's nary a wine grape association in California that isn't wary of overproduction, after reports that the state's grape acreage has grown as much as 20 percent in just four years.

The wine industry has been here before, just a decade ago.

In the mid-1980s, a huge production swell dropped prices to the point that some growers couldn't recover the harvest costs. That brought vineyard development to a screeching halt.

With these dark clouds again supposedly forming over the wine industry, shouldn't the world's largest producer of grapevines be running scared?

"An agricultural depression is always a concern for a nursery," said …