Severe Pruning is No Cure for Pierce's Disease
Some grape growers have tried severe pruning methods in hopes of stopping the spread of PD in already infected vines, but research shows it's ineffective.
Mar 2009 Issue of Wine Business Monthly
Since there is no cure for Pierce's Disease at this point in time, the best remedy is to know the alternatives. Although a lot of growers think severe pruning is one of them, it turns out it's not. The belief that PD could be eliminated from an infected grapevine by hacking it down to the "knee cap" has been generally discredited--at least that is the strongly held view of some California farm advisors and academics. While severe pruning might be a way to reestablish healthy vines, the...
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