Summary
Observations in the Florida and Maine potato sections indicate that the symptoms and yield reductions of the same type of mosaic are similar in both places. Very little leaf roll has been observed in the Spaulding Rose No. 4 variety in the two sections for the past five years. Spindle tuber is much more destructive in the Spaulding Rose No. 4 variety in the South than in the North, according to the data here presented. Observations during three years disclosed that spindle tuber caused from 78 to 95 per cent reduction in the yield of prime tubers in Florida and only 26 to 50 per cent reduction in Maine.
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Conducted as a cooperative project between the Bureau of Plant Industry, U. S. Department of Agriculture, and the Florida Agricultural Experiment Station.
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Gratz, L.O., Schultz, E.S. Observations on certain virus diseases of potatoes in Florida and Maine. American Potato Journal 7, 187–200 (1930). https://doi.org/10.1007/BF02880697
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DOI: https://doi.org/10.1007/BF02880697