| Vegetative propagation through budding, grafting, tubers, rootstocks and tissue culture are major industries. |
| A few fruit grower associations and progressive orchardists have already started importing virus-free nursery rootstocks. |
| Measurements of air conductivity were performed on stem or branch segments of a series of eight unworked apple rootstocks and two scions. |
| Plants that form rootstocks can be spurred to regrowth after several years through tillage. |
| Conventional tillage is effective for reducing populations of many biennial and perennial weeds that may arise from rhizomes or rootstocks. |
| Nearly five per cent of all vines grow on their own roots, without having been grafted on to resistant rootstocks. |
