Pecan cultivars
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'Mandan' (Nut Photo) 'Mandan'
originated from a controlled cross ('BW-1' X Osage) made in Brownwood, Texas, in 1985. It was tested
as 1985-01-0002 and released by USDA-ARS in 2009. Mandan is being
released because of its high nut quality, high yield potential,
early nut maturity, and excellent scab disease resistance. Pecans
from this cultivar can be sold in-shell or shelled to produce
a large proportion of halves and large pieces. In a 13 year replicated
yield test at Brownwood, TX, Mandan had yields comparable to 'Pawnee',
and that exceeded 'Desirable'. 'Mandan' appears to be less alternate
bearing than 'Pawnee' and 'Desirable'. The nut is oblong elliptic
with an obtuse apex, and rounded base and is flattened in cross
section. There are 46-52 nuts/lb, with 63-65% kernel. Kernels
are cream to golden in color, with medium, non-trapping dorsal
grooves and rounded dorsal ridge. Nuts
shell out easily into full halves and are very attractive. Time of spring budbreak is after
'Pawnee'. 'Mandan' is protandrous, with early to mid-season pollen
shed and mid to late season pistil receptivity (similar to Pawnee).
'Mandan' should be a good pollenizer for, and be well pollenized
by 'Kanza' , 'Wichita' and 'Lakota'. Time of nut maturity is very
early or about one week before Pawnee. Tree form is tall, but
narrow in width, with
abundant branches and strong
branch angles. Tree
form appears distinct from more
spreading trees such as 'Desirable'. 'Mandan' is resistant to scab disease, with medium
susceptibility to yellow and black aphids.
LJ Grauke , Research Horticulturist &Curator
USDA-ARS Pecan Genetics
10200 FM 50
Somerville, TX 77879
tele: 979-272-1402
fax: 979-272-1401
e-mail:lj.grauke@ars.usda.gov
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