Joe Nicholson of New York with a Rubinola tree that shows symptoms of sulfur intolerance. Geraldine Warner Britain has only about a dozen serious ­commercial organic growers, estimates Dr. Jerry Cross, who heads the entomology and plant pathology team at East Malling Research. And East Malling Research is one of them. The research station has been downsized over the years, in terms of faculty, but it still has more than 500 acres of land. Some of the ground is used to produce crops to generate income for research. Almost 30 acres of organic apples have been planted over the last […]