30 April, 2012
Alternatives to Eucalyptus for Pole Production
A typical stand of GxU
There has been much speculation about
Eucalyptus grandis being the best specie for pole production. In recent years there have been Eucalyptus
crosses made that would appear to be better for poles
than the straight E. grandis, but pole treatment plants have been reluctant to take them.
There is now conclusive proof that the E.
grandis x E. urophylla (GXU) and E. grandis x E. nitens (GXN) are suitable for
pole production and in some cases even better.
Tests done by SAUPA have indicated that the
CSIR (NCT) clones GxU 111 and GxU 082 have a better retention than E.
grandis. The GXU clones can be planted
on any E. grandis site and have the added advantages in that they are tolerant
to the Gall Wasp, disease, canopy quickly, coppice very well and will give you
up to 30% better volume.
For the colder areas there is the option of
GxN clones, in particular GxN 018b, AND GxN010. These clones have acceptable retention levels but are denser than
E.grandis. The GxN 010 and GXN 018b
both have moderate snow tolerance. GxN
010 has tolerant to the Gall Wasp.
We would recommend
that all farmers begin planting alternatives to E. grandis. The GXU and GXN
clones are available in commercial quantities from various nurseries. Sunshine Seedlings has recently completed a
rooting tunnel increasing its capacity to 1.2 million placed cuttings per
month. We are confident that any clonal orders can be met by the commercial
nurseries provided that orders are placed 4 months in advance.
Results of the retention test carried out by the SABS for pole production