Pruning allows to the management of yield per vine (or per m2) by controlling the number of latent buds (i.e. winter buds which bear the inflorescence primordia).
While pruning, some basic principles need to be considered for grapevine sustainability:
1. To respect the sap flows (xylem and phloem) by positioning the pruning wounds always (and when possible) on the same side of the arms and spurs (cordon pruning). For spurs it is possible to alternate the wounds to allow vertical spurs (Figure 1)
2. For cane/Guyot pruning to avoid to form a willow head (Guyot/cane pruning) (Figure 2).
3. To avoid creating dead zones (desiccated cones) within the perennial organs (trunk, arms, spurs…) by avoiding cutting close to the wood (Figures 3 & 4).
4. Therefore, in wood older than 1 year, a portion of wood should be left while pruning (the length should be 1,5 or 2 times the diameter of the pruned organ) as showed by figure 5.
5. The consequence could be the development of the basal buds which will require some extra work by cleaning/removing the issued growing shoots in spring.
6. The general aims are
i) to avoid the increase of necrotic-dead wood/tissues over years;
ii) to maintain the vascular system (xylem-phloem) operational.
7. It is also recommended for the two buds’ spur to cut just below the third winter bud on the cane to let a pat of internode long enough to avoid the necrosis of the tissue and of the winter bud located below the wound (figure 6).
These pruning objectives should help:
a) To achieve more homogeneous budbreak and primary shoot development & therefore homogeneous vines.
b) To achieve a better fruit zone microclimate (depending on the vegetative expression/vigour of the vines).
c) to avoid wood diseases propagation (Esca, Botryosphaeria
dieback…) which is one of the goals of gentle pruning
(taille “non mutilante”)”.
Acknowledgments: Thanks to Dr Suzy Rogiers (DPI-NSW, Australia) for English proof reading.
Questo sito utilizza cookies per migliorare la tua esperienza. Se non sei d'accordo puoi decidere di disabilitarli. Leggi di piùACCETTA
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.