date:Apr 15, 2013
ds of prevention and treatment include resistant varieties and rootstocks, pruning and the spraying of a copper sulfate. The copper, however, can damage the appearance of fruit, hampering a farmer's chances of selling it.
It makes a Bartlett look like a Bosc, said Bill Denevan, a former grower in Santa Cruz, Calif.
Two alternatives to antibiotics - a yeast-based product called Blossom Perfect and a new, less damaging copper spray called Previsto - have performed well in trials, according to Ke