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Table 7 Effect of six isolates of HCN-producing rhizobacteria on incidence of root-knot nematode on tomato plants in the absence or the presence of A. tumefaciens after 45 days of inoculation

From: Influence of hydrogen cyanide-producing rhizobacteria in controlling the crown gall and root-knot nematode, Meloidogyne incognita

Treatments Pathogen Incidence of root-knot nematode disease
Nematode population in Final population
(Pf)
Reproduction factor (RF) Reductions in nematode population %(Red %) No. of galls Root gall index (RGI) No. of egg masses Egg masses index (EI)
Soil (250 g) Root
Developmental stages Females
P. japonica M. incognita 784.0EF 0.0E 15.0G 799.0E 0.40 85.7 11.2F 3.0 12.8ABC 3.0
B. megaterium 1808.0C 5.0DE 44.2B 1857.2C 0.93 66.7 37.0C 4.0 10.0C 2.0
Pseudomonas sp. Gamma-81 500.0 FG 0.0E 26.0DE 526.0EF 0.26 90.6 13.2F 3.0 0.0D 0.0
P. tolaasii 564.0FG 0.0E 29.2CD 593.2EF 0.30 89.4 16.0EF 3.0 3.0D 2.0
P. chlororaphis 428.0FGH 0.0E 16.0FG 444.0EFG 0.22 92.0 13.0F 3.0 0.0D 0.0
P. mosselii. 396.0FGH 0.0E 15.0G 411.0EFG 0.21 92.6 12.8F 3.0 0.0D 0.0
Control(+) 5412.0A 87.4A 74.6A 5574.4A 2.79 0.0 63.8A 4.0 15.8A 3.0
Oxamyl 244.0GH 16.2CD 27.8CD 288.0FG 0.14 94.8 21.6DE 3.0 10.0C 2.0
P. japonica M. incognita + A. tumefaciens 1216.0DE 10.0CDE 31.6CD 1257.6D 0.63 72.4 31.4C 4.0 12.0BC 3.0
B. megaterium 608.0FG 0.0E 27.0D 635.0EF 0.32 86.1 23.2D 3.0 0.0D 0.0
Pseudomonas sp. Gamma-81 1348.0D 19.4C 35.2C 1402.6D 0.70 69.2 36.0C 4.0 3.0D 2.0
P. tolaasii 436.0FG 0.0E 25.8DE 461.8EF 0.23 89.9 22.2DE 3.0 0.0D 0.0
P. chlororaphis 486.0FG 0.0E 23.8DEF 509.8EF 0.25 88.8 21.4DE 3.0 0.0D 0.0
P. mosselii. 324.0GH 0.0E 18.4EFG 342.4FG 0.17 92.5 11.0F 3.0 0.0D 0.0
Control(+) 4456.0B 59.6B 44.8B 4560.4B 2.28 0.0 53.0B 4.0 13.4AB 3.0
Control(−) 0.0H 0.0E 0.0H 0.0G 0.0 0.0 0.0G 0.0 0.0D 0.0
Healthy plants 0.0H 0.0E 0.0H 0.0G 0.0 0.0 0.0G 0.0 0.0D 0.0
  1. Means in the same column shared a letter are not significantly different (p ≤ 0.05); RF = final population in treatment/2000; Red% (reductions in nematode population%) = [(Pfc − Pft)/Pfc] × 100 where Pfc = final population in control and Pft = final population (Pf) in treatment; RGI or EI was determined according to the scale given by Taylor and Sasser (1978)