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Survivorship of aphid isolates WU-3 and WU-4. Comparison of survivorship on a resistant line, Sun6082 (R), and a susceptible line, CastlerockII (S). (A) For aphid isolate WU-3, the survivorship was significantly higher on the susceptible than on the resistant tomato line (P = 0.0402). (B) For aphid isolate WU-4, there was no significant difference in survivorship on resistant and susceptible tomato lines (P = 0.3626).
