Cedar apple rust can become a big problem. Please see the fact sheet at http://nysipm.cornell.edu/factsheets/treefruit/diseases/car/car.asp.
There are some apple varieties that are resistant to the disease. Delicious, McIntosh, Jerseymac, and Liberty are a few. See a longer list at http://nysipm.cornell.edu/factsheets/treefruit/diseases/car/car_table2.gif
Cedar apple rust can become a big problem. Please see the fact sheet at http://nysipm.cornell.edu/factsheets/treefruit/diseases/car/car.asp.
There are some apple varieties that are resistant to the disease. Delicious, McIntosh, Jerseymac, and Liberty are a few. See a longer list at http://nysipm.cornell.edu/factsheets/treefruit/diseases/car/car_table2.gif