ISHS Acta Horticulturae 617: Workshop on Rootstocks' Performance in Phylloxera Infested Vineyards
POISONING GRAPEVINES TO AVOID THE RISK OF GRAPE PHYLLOXERA RE-INFECTION? |
| Author: | J.V. Herrmann |
| Keywords: | Vitis, Phylloxera (Daktulosphaira vitifoliae FITCH), Roundup® |
| Abstract:
Active control of radiculae phylloxera (Daktulosphaira vitifoliae) in vineyards with chemical agents is environmentally problematic and is already or will soon be banded in many countries. Apart from breeding rootstocks with a high resistance, developing additional procedures to control phylloxera are urgently required, in particular in replant situations. Once vines have been cleared, root pieces may survive in the soil for many years. Radiculae phylloxera can feed on these root pieces, survive the fallow period and rapidly spread to newly planted young vines. In greenhouse and field trials it was investigated whether it is possible to kill roots of old vines prior to clearing with the herbicide Roundup®. Such a method would effectively prevent phylloxera from feeding, drastically reduce or even eliminate its population and prevent young vines from being infected. After spraying Roundup® to the leaves vineshoots rapidly began to die off and the vitality of the root systems was significantly reduced. However during the 20-month trial period, the roots did not die completely. After a Roundup® infiltrating into the trunk up to 85 % of the root system died off within 20 months. Therefore, Roundup® infiltration into the trunk is a potential method to kill vine roots effectively and prevent young freshly planted vines from infection. Further investigations are necessary to improve the herbicide effect of Roundup® on the vine roots and to establish a practical procedure. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
