    |
|
|
|
|
Regional Rootstock
Evaluation - NSL John Edstrom This trial was planted at a 22x24 foot spacing in March 1997 to evaluate 7 rootstocks on NonPareil (½) with pollinizers of Carmel (1/6), Monterey (1/6) and Aldrich (1/6). The area was slip plowed and is irrigated with dual microsprinklers. Each combination was planted in 8 reps of 8 trees. Of the 64 trees of each combination planted, all trees on Nemaguard, Hansen 536, UC 1-82, and Atlas established successfully. One tree each on Lovell and Bright's hybrid were lost at planting, and two trees on Viking died. Trunk Circumference at 12 inches above ground level was measured in August 1999. The Colusa regional rootstock evaluation is proceeding as expected and in
general all stocks are performing similarly in terms of trunk size and survival
with little if any differences showing at present. This uniformity may be
partially due to the "evening out " affect that micro-irrigation often
seems to have on new trees. Tree growth has been very vigorous except for some
Monterey tress on Brights Hybrid. These have developed symptoms like those found
on incompatible scion/root combinations, i.e. marginal leaf burn, early
defoliation, reduced growth and even tree death. Monterey variety almonds are
normally considered compatible with Brights Hybrid.
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Send mail to jlschmierer@ucdavis.edu with questions or comments about this web site.
|
