Table 4.
Susceptibility to Rhizoctonia stolon pruning of selected potato cv. Russet Burbank variants in glasshouse (GH1—2010; GH2 and GH3—2011) trials. Rhizoctonia solani AG3 isolates R299, R422, and TAS1 were tested separately in each trial.
| Variants | Mean stolon pruninga—GH1 | Mean stolon pruning—GH2 | Mean stolon pruning—GH3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| R299 b | R422 | TAS1 | R299 | R422 | TAS1 | R299 | R422 | TAS1 | |
| A380 | 0.75 | 0.88 | 1.25 | 0.33 | 0.00 | 0.33 | 0.67 | 0.33 | 0.33 |
| A168a | 2.88 | 0.88 | 1.63 | — | — | — | — | — | — |
| TC-RB8 | 2.00 | 1.25 | 0.75 | 0.00 | 0.00 | 0.00 | 0.33 | 0.67 | 1.00 |
| A362 | 2.50 | 1.88 | 2.13 | — | — | — | — | — | — |
| Russet Burbank (parent) | 1.50 | 0.88 | 1.38 | 0.33 | 0.00 | 0.00 | 0.67 | 1.00 | 1.00 |
| P | 0.11 | 0.47 | 0.56 | 0.69 | — | 0.44 | 0.79 | 0.44 | 0.11 |
| LSD (0.05) | ns | ns | ns | ns | ns | ns | ns | ns | ns |
—: lines not tested within the specified trial.
aStolon pruning disease score—0: no disease, 1: 1 or 2 stolons with lesions, 2: 1 or 2 stolons girdled, 3: 3 stolons girdled, and 4: 4 or more stolons girdled.
bMeans followed by the same letter within the same column are not significantly different at P = 0.05 using Fisher's LSD test; ns: non-significant.