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. Trees are compact columnar in growth habit, with abundant branches and strong branch angles. The compact habit should allow them to escape shading longer than more spreading trees such as 'Desirable', at any tree spacing. Dense branching contributes to productivity. '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:ljg@tamu.edu

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