The damage to apple trees which resulted from the Nov. 11, 1940, freeze could have been prevented in a large measure by the use of hardy, intermediate stocks, like Hibernal and Virginia Crab. This was the general opinion of a large group of midwestern fruit growers and horticultural specialists who met at Ames recently to observe results in the experimental stock orchards of the Iowa Agricultural Experiment Station. The use of certain stock combinations in these orchards indicated that hardy stocks were the most important single factor in preventing cold injury. It was also observed that the new varieties, Sharon, Edgewood, Secor, Hawkeye Greening and Norwel, came through the storm in perfect condition, even to the extent of carrying a crop of fruit at the present time.
Maney, T. J.
"Hardy Stocks Stood the Shocks!,"
Farm Science Reporter: Vol. 2
, Article 4.
Available at: http://lib.dr.iastate.edu/farmsciencereporter/vol2/iss3/4