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North Dakota State University * Langdon Research Extension Center
9280 107th Ave. NE,  Langdon, ND 58249, Voice: (701) 256-2582, FAX: (701) 256-2580


Short Season Oil Sunflower       Langdon
Days 
to Plant Test Sclerotinia2
Brand Hybrid Bloom Height Weight Head Rot Stalk Rot Oil3
      in lbs/bu % incidence %
NuSun   
Dekalb DKF33-33NS 80 54 19.7 1 7 29.9
Dekalb MH4231 79 55 17.3 14 8 29.0
Dekalb DKF30-33NS 80 52 17.7 14 10 27.7
Dekalb MH4233 81 57 17.0 27 14 27.0
Dekalb MH4431 83 52 15.7 6 9 23.7
Dyna-Gro Exp91N05 78 48 18.8 22 5 26.8
Proseed 9441 82 60 16.0 7 23 26.0
Proseed CL 55-151 85 55 14.3 4 3 21.1
Traditional  
Dyna-Gro DG 92T94 82 52 16.7 4 28 29.2
Kaystar 8300 79 50 19.7 30 13 31.6
USDA 894 81 58 18.8 13 17 28.0
Trial Mean   81 54 17.4 13 12 27.3
C.V. % 1.2 3.7 3.8 55 74 5.5
LSD 5%   1.6 3.4 1.1 12 NS 2.6
Yield C.V. % was 30%. Yield data was too variable to report.
1Clearfield hybrid
Days to bloom hybrid check: Hysun 311=79, SF270=77, PI6451=84
No hybrid reached visual physiological maturity before the October 1 killing frost.
No harvest moisture was recorded because of extended period of wet weather between killing frost and harvest. 
2Percent of plants that were infected with head rot and/or stalk rot.  The majority of stalk rot was mid-stalk rot. 
Differences between hybrids may have resulted from genetic differences and/or environmental conditons
that were more or less favorable for disease development during that hybrid's flowering period.
3Oil adjusted to 10% moisture.  Oil % of NuSun hybrids were adjusted for oil type.
Planting Date: June 9, 2004
Harvest Date: November 2, 2004


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