Table 1.
Control of tomato bacterial wilt by an avirulent Ralstonia solanacearum strain and a microbial restoration substrate.
| Treatment | 2017 | 2018 | ||||||
|---|---|---|---|---|---|---|---|---|
| Disease severiy index | Observed control (%) | Expected control (%) | Difference | Disease severiy index | Observed control (%) | Expected control (%) | Difference | |
| CK | 43.18 ± 2.12 a | — | — | — | 53.10 ± 4.18 a | — | — | — |
| aRS | 14.49 ± 0.67c | 63.06 ± 0.91 b | — | — | 14.52 ± 1.58 b | 63.79 ± 1.14 c | — | — |
| MRS | 19.24 ± 1.91 b | 42.86 ± 1.18 c | — | — | 16.32 ± 1.65 b | 52.64 ± 1.99 b | — | — |
| aRS + MRS | 8.59 ± 1.06 d | 80.79 ± 3.87 a | 78.89 ± 0.08 | +1.90 | 6.13 ± 0.87 c | 85.79 ± 1.83 a | 82.86 ± 0.92 | +2.93 |
Data are means ± standard error (n = 3); Values within a row followed by the same letter are not significantly different at P ≤ 0.05.
aReduction in disease incidence relative to the control.
bExpected control is the cotrol resulting from the combination as predicted by the equation of Colby.
dDifference = % reduction observed-% reduction expected, with a plus sign indicating a synergistic
effect.