Rooting Out the Best in Apple Rootstocks

摘要

With 600 acres of apple trees in Walden, New York, Jeff Crist faces a number of threats from nature each year.Fire blight, a bacterial disease that attacks blossoms, shoots, and limbs, has been known to kill off entire orchards. Replant disease, which reduces growth of new trees in soils that support the same type of tree year after year, can cause major losses. Aphids and cold temperatures can also cut into apple production.