.D E
 Figure 7.-A. Bliss triumph potato badly infected and disfigured by root-knot
nematodes. Specimens collected at Gainesville, Florida. Note the protruding knobs
formed by the nematodes and compare with B where symptoms are sunken, crater-
like spots. B-E. Bliss triumph potato infected and disfigured by root-knot nema-
todes. Specimens collected at Tampa, Florida. It is thought that the difference in
symptoms observed in the potatoes of A and B-E of this Figure are the result of
species differences in the attacking nematode populations; % normal size.