Table 5.
Mean severity of MRRD on nine cowpea lines inoculated with isolates of the pathogen from ten locations in Northern Ghana.
| M. phaseolina Isolates | Cowpea lines |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Apagbaala | AV22224 | Hewale | IT93K503-1 | IT99K573-1-1 | Nhyira | Songotra (susceptible check) | Suvita2 | T2T4 | Mean virulence | |
| Arigu | 1.40 | 3.40 | 3.00 | 2.60 | 3.00 | 3.40 | 7.00 | 1.80 | 3.00 | 3.18 |
| Asumsapeliga | 2.20 | 3.00 | 3.00 | 3.00 | 2.60 | 3.40 | 8.20 | 1.80 | 3.40 | 3.40 |
| Botanga | 1.80 | 1.80 | 1.40 | 1.80 | 1.00 | 3.00 | 5.80 | 1.40 | 1.00 | 2.11 |
| Chinchan | 2.20 | 3.40 | 3.40 | 2.60 | 2.60 | 3.40 | 7.00 | 1.40 | 3.00 | 3.22 |
| Feo | 2.20 | 3.40 | 3.40 | 3.00 | 2.60 | 3.00 | 8.60 | 2.60 | 3.40 | 3.58 |
| Manga | 3.00 | 3.40 | 3.40 | 3.00 | 3.00 | 3.40 | 9.00 | 2.20 | 3.40 | 3.76 |
| Nafkuluga | 2.20 | 3.80 | 2.60 | 2.60 | 2.20 | 2.20 | 7.00 | 1.80 | 3.40 | 3.09 |
| Nyankpala | 1.00 | 1.80 | 1.80 | 1.80 | 1.80 | 2.60 | 6.60 | 1.80 | 1.40 | 2.29 |
| Sakpari | 1.80 | 2.20 | 3.00 | 2.60 | 2.20 | 3.40 | 6.20 | 1.40 | 3.00 | 2.87 |
| Silbelle | 2.60 | 3.40 | 3.40 | 2.60 | 2.20 | 3.80 | 7.80 | 1.80 | 3.20 | 3.42 |
| Mean disease severity | 2.04 | 2.96 | 2.84 | 2.56 | 2.32 | 3.16 | 7.32 | 1.80 | 2.82 | 3.09 |
L.S.D (P = 0.05) genotype = 0.63; isolate = 0.66; genotype × isolate = NS. CV (%) = 22.2.
(NS) = not significant.