Leaving the plot to rest is strongly advised after grubbing up, but rest duration can vary according to the estate's own issues and objectives. There are three main scenarios:
-
When the plot is infected with a virus such as Grapevine Fanleaf it should be managed specifically. See section Disease and pest management. If a nematode analysis shows a large nematode presence on the plot, it is strongly advised to let the parcel rest for 5 to 7 years and continue to regularly observe the situation afterwards. A nematode count can be carried out 3 years after the start of the resting period. If the result is negative, a third test is unnecessary before replanting after the resting period. When after 3 years the test is positive, an additional test is highly recommended before replanting to avoid any contamination risks. In this case, it is often best to extend the resting period by one year.
During the first test, pits are dug and marked. During the second analysis, only those pits whose sample revealed the presence of nematodes will be opened again for analysis. In order to best estimate the costs associated with these analyses, 50% of the pits should be considered contaminated with nematodes. -
For plots affected by root rot, a rest period is also necessary. A resting period of 4 to 5 years is necessary as is a cultivation of barley-type cereals on the plot during its resting period.
-
If a plot is considered healthy at the time of grubbing up, a resting period of 3 years is recommended before replanting, but it is quite possible to observe a longer or shorter period. For example, if a young plot has been planted with a poor grape variety/soil match, it can be replanted quickly.