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Table 2 A rating for host suitability designation to Meloidogyne spp

From: Towards sound use of statistics in nematology

Parameters and variables* Rating Designation
Insignificant damage (P ≈ 0.20); RP, RM and/or RR = 0; R = 0 0 Immune
Insignificant damage (P ≈ 0.20); E < 10; R < 1 1 Highly resistant
Insignificant damage (P ≈ 0.20); E < 20; R < 1 2 Resistant
Significant damage (P ≈ 0.10); E < 30; R < 1 3 Moderately resistant
Insignificant damage (P ≈ 0.10); E > 20; R > 1 4 Tolerant
Significant damage (P ≈ 0.05); E < 40; R ≤ 1 5 Hyper-susceptible
Significant damage (P ≈ 0.05); E > 30; R > 1 6 Susceptible
Significant damage (P ≈ 0.01); E > 30; R > 1 7 Highly susceptible
  1. *P (probability level); E (number of egg masses/plant); R (reproduction factor) = (Pf/Pi), where Pf and Pi are the final and initial populations of nematodes; RP (rate of penetration) = (count of total nematodes in root tissues/count of nematodes used in inoculation) × 100; RR (rate of reproduction) = (count of egg-laying females/total count of females and egg-laying females) × 100; RM (rate of maturation) = (total count of females and egg-laying females/count of total nematodes in root tissues) × 100