420A Millardet and de Grasset
| Relative Scion Vigour: Low to Moderate |  |
| Rootknot Nematode Resistance: Moderate | |
| Dagger Nematode Resistance: Low | |
| Root Lesion Nematode Resistance: Low | |
| Phylloxera Resistance: High | |
| Lime Tolerance: Moderate | |
| Drought Tolerance: Moderate | |
| Root Strike: Fair | |
| General Comments: | |
420A is suited to poorer, fine textured soils. Does not withstand waterlogging. Overcropping may be a problem in the early years of vine development. Susceptible to drought. Other rootstocks better. |
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