OREGON STATE LIBRARY ocliment Section rciion egelaihe D Volume 24 Oregon State University, October 1975 Number 4 Sweet corn varieties tested Commercial and experimental sweet corn hybrids were planted at the Oregon State University Vegetable Research Farm on May 12, 1975. Each hybrid was growi in six 35 ft. plots, arranged in 4 randomized blocks with 15 ft. guard plots on the ends of the field. Seedlings were thinned to 35 plants per plot. A band application of 600 lbs. of 8-24-8 fertilizer was made prior to planting and about 60 lbs. per acre additional N, as ammonium nitrate, was applied just prior to tasseling. Water was applied about every 10 days after the early growth stages. Vigor and uniformity of the planting were good. Yields were obtained from 4 replications after making sample harvests, in some cases with moisture determination, from the 2 extra replications. Processing tests were made on 12 of the most promising varieties. Results of panel evaluations of processed samples are shown in Table 3. Some varieties included in this trial were also planted in a commercial field at Scio, Oregon for a test of head smut resistance. This test, reported in Table 5, also included 16 varieties not planted in the yield trial. Eight varieties were included in a larger trial involving spacing and nitrogen variables. Results are shown in Table 4 as mean of all treatments or for all varieties. Sources of varieties - Charter Research, P.O. Box YY, Twin -. Falls, Idaho 83301 Rogers Bros., P.O. Box 2188, Idaho Falls, Idaho 83401 Asgrow Seed Company, Kalamazoo, Michigan 49001 Ferry Morse Seed Company, Box 967, Mountain View, California 94040 FMC Seeds, P.O. Box 2508, El Macero, California 95618 Harris Seeds, Moreton Farm, Rochester, New York 14624 Northrup King Co., 1500 Jackson Street NE, Minneapolis, Minnesota 55413 Keystone Seeds, 101 Chateau Avenue, St. Louis, Missouri 63123 The following varieties, excluding the standard 'Jubilee', appeared to deserve special discussion, based on yield or other considerations. These comments were derived from the variety screening
trial and smut resistance trial where applicable. Commander - good yield and good quality scores; very late maturity. Stylepak - fair yield, good quality (especially in appearance and color); fairly good smut resistance; quality holds well over a range of maturity. Rapidpak - early maturity, excellent quality scores - highest overall. score for canning; very good smut resistance; yield low. Fanfare - medium early; yield very good; smut resistance fairly good; overall quality score down in canned samples. 2580 - several days earlier than Jubilee; yield good; smut resistance very good; processed quality good. Now named Reliance. 1174-203 - high yield; strong taper with tendency for tip blanking; very good overall quality scores; best flavor score in both canned and frozen samples; very tall plant. Additional varieties not included in the yield test should be mentioned because of outstanding low smut readings: Sweet Sue, NCX 2007, NCX 2009, NCX 2004, 72-2381, 72-1683, 72-2291, and also JL 49, a home garden variety of excellent appearance. --N. S. Mansour, J. R. Baggett and H. J. Mack Horticulture Department --G. W. Varseveld Food Science Department
Table 1. Characteristics of Sweet Corn Varieties Observed at Corvallis, Oregon, 19751 No. Variety Source 50% Silk Days to Maturity Avg. Ear Length (inch) Avg. Ear Diam. (inch) Kernel Depth (mm) Row No. Row Str. Tip Fill Taper Uniformity Mat. Ear Kernel Avg. Tender. Suckers Plant Height Notes 1 Fanfare 2 7/22 108 7.6 2.2 II 18-20 3.0 3.0 3.0 4.0 3.0 3.0 169 2.3 7.8 Tip fill poor on second ears 2 71-1805 2 7/21 102 7.8 2.0 10 18 3.0 2.0 3.0 3.0 3.0 3.0 149 2.0 7.0 3 71-2477 2 7/27 121 7.7 2.05 11 20 3.0 3.0 3.0 3.0 3.0 3.0 149 2.0 9.0 4 70-2162 2 7/27 114 7.5 2.2 11 16-18 3.0 1.0 4.0 3.0 3.0 3.0 142 2.3 8.8 Tips blank cleanly I Jubilee 2 7/26 113 7.9 2.1 10 16-18 3.0 4.0 3.0 4.0 4.0 3.0 130 2.0 8.25 6 2580 7 7/22 105 7.4 2.2 12 16-18 4.0 2.0 5.0 4.0 3.0 4.0 133 2.0 7.25 Many culls but rest uniform 7 4205 8 7/29 116 8.6 2.05 10 14 3.0 3.0 2.0 3.0 2.0 3.0 154 2.0 9.0 8 7597 8 7/27 114 7.8 2.1 12 20-22 3.0 2.0 2.0 3.0 1.0 3.0 167 2.5 8.5 9 NCX 2012 5 7/21 102 7.6 1.95 10 14 2.0 1.0 3.0 3.0 2.0 3.0 173 2.0 8.13 10 H74-203 1 7/28 115 8.5 2.0 9 16-18 3.0 3.0 2.0 3.0 3.0 3.0 116 2.25 9.25 Hard to pick and husk 11 1174-204 1 8/1 121 9.0 2.0 10 18-20 3.0 2.0 3.0 2.0 1.0 3.0 162 3.0 9.0 Rad lodging; hard to husk; long 12 H74-205 1 7/27 115-8.0 1.9 9 14-16. 3.0 3.0 2.0 2.0 2.0 2.0 142 2.0 9.25 13 Commandei 3 8/2 120 7.9 2.15 11 18-20 3.0 2.0 3.0 3.0 3.0 3.0 118 2.0 9.0 14 Salute 3 7/30 119 7.1 2.2 12 18-20-22 3.0 3.0 3.0 3.0 1.0 3.0 140 2.0 8.4 15 Merit 3 7/28 119 7.8 2.3 13 18-20 3.0 2.0 3.0 3.0 2.0 3.0 157 2.0 9.0 Tough ugh t color; some high on stalk TAztec 3 7/19 95 7.0 1.86 9 14-16 2.0 3.0 2.0 3.0 3.0 2.0 165 2.0 7.75 17 Stylepak 4 7/28 116 8.0 2.1 10 16-18 3.0 5.0 4.0 3.0 4.0 4.0 130 2.0 8.0 V. good tip fill 18 Rapidpak 4 7/24 105 7.2 1.95 10 18-20 3.0 4.0 3.0 4.0 4.0 4.0 133 2.5 7.13 'Scores, where used, were based on a 1-5 scale, with 5 mosr desirable.
Table 2. Mean Sweet Corn Yield Data From Four Replications, Corvallis, Oregon, 1975 No. Variety Source Gross Wt. T/A Culls No. ears acre + 100 Wt. T/A Ears/A1 Good Ears Wt. T/A2 Lb./ear %3 Moisture Adjusted4 T/A 1 Fanfare 2 14.4 98.0 1.3 25,086 9.0.72 72.9 9.2 2 71-1805 2 12.0 56.6.8 26.367 7.6.58 71.0 7.4 3 71-2477 2 14.2 61.9.9 27.861 9.3.67 70.8 9. 70-2162 2 14.8 46.9.6 29.783 9.5.64 71.6 9.4 Lr '0 Jubilee 2 14.0 58.7.8 27.007 8.7.65 71.3 8.6 7SRfl 7 12.7 88.6 1.1 24.552 8.1.66 73.9 8.5 4205 8 12.0 118.5 1.5 19.855 7.2.72 71.7 7.1 7597 8 14.0 171.9 1.7 25,299 7.2.57 71.4 7.1 NCX 2012 5 13.3 57.7.7 27.861 8.1.59 72.0* 8.1 4 H74-203 1 15.5 77.9 1.2 25.406 8.8.70 72.8 9.0 11 H74-204 1 13.4 122.8 1.5 22,524 8.2.74 12 H74-205 1 13.2 71.5.9 27.861 8.2.59 71.0* 8.0 13 Commander 3 15.8 121.7 1.6 26.047 9.1.70 72.2 9.1 14 Salute 3 12.6 130.2 1.6 22.737 7.6.67 15 Merit 3 15.7 114.2 1.6 26.687 10.1.76 7Ø5* 97 16 Aztec 3 9.4 35.2 5 22,204 5.3.48 17 Stvleuak 4 13.4 149.5 1.6 20.816 7.1.68 74.9 7. '0 18 Rapidpak 4 11.5 58.7.7 25.833 6.8.53 71.6 6.7 1LSD for no. good ears/acre: @ 5% - 2892; @ 1% - 4626. 2LSD for wt. good ears/acre: @ 5% - 1.19 tons; @ 1% - 1.9 tons. 3% moisture of samples processed. * indicates % moisture is an estimate based on a determination made on a day other than harvest date. Variety 15 was at 72.4% four days prior to harvest. 4yields adjusted to 72% H20 when moisture % available: 1% difference in % H20 = 2.4% change in yield.
Table 3. Panel Quality Evaluations of Processed Sweet Corn Varieties, Corvallis, Oregon, 19751 No. Variety % Moist, Frozen Sanp1es Canned Samples Laboratory Data2 Overall Cut-off Av. Kernel Pencarp Color Appear. Text. Flay. % Width, In. Overall Color Appear. Text. Flay, Shear Press Kernel Type 1 Fanfare 72.9 5.8 6.7 5.7 5.5 5.7 4.6 5.6 5.3 5.6 4.8 68.0 0.35 0.55 422 long, $ emi-flat 2 71-1805 71.0 6.1 6.7 6.8 5.7 5.7 5.3 5.8 6.0 5.1 4.9 61.8 0.35 0.87 428 med. long, semi-flat 3 71-2477 70.8 4.7 7.2 5.6 4.1 5.0 5.0 6.2 5.2 5.6 5.1 67.2 0.37 0.94 426 med. long, thick, oval 6 flat 4 70-2162 71.6 5.6 6.5 6.0 5.3 5.7 4.7 6.0 4.7 4.7 5.3 66.4 0.32 0.79 453 med. long, oval S Jubilee 71.3 5.3 6.3 5.5 5.3 5.2 5.2 5.8 4,9 5.3 5.6 71.0 0.36 0.63 438 - var. len g oval f1 ' 2580 73.9 5.7 7.1 6.3 5.6 5.0 5.6 5.5 5.8 6.0 5.4 65.8 0.33 0.70 364 med. long, oval 7 4205 71.7 5.4 7.3 6.7 4.1 4.9 5.3 7.0 6.1 4.5 5.0 63.9 0.35 0.92 479 med. long oval to flat 8 7597 71.4 6.4 6.9 6.3 6.0 6.2 6.0 5.4 6.1 6.5 6.1 65.2 0.31 0.60 464 oval,flat topped, med. long 10 1174-203 72.8 6.6 6.2 6.0 7.0 7.0 6.4 6.1 6.4 7.1 6.6 -- 0.32 0.19 305 1 1- ong, ova round 13 Commander 72.2 6.4 7.0 6.5 6.0 5.6 6.0 6.5 6.4 6.3 5.7 65.2 0.33 0.65 375 - - med. long, ov al-flat 17 Stylepak 74.9 6.4 7.2 6.7 6.3 5.7 6.3 7.0 7.2 6.7 5.3 65.7 0.30 0.69 427 short to med. long, oval 18 Rapidpak 71.6 7.0 7.3 7.0 6.7 6.6 6.1 6.6 6.3 6.4 5.5 62.9 0.30 0.47 375 med. long oval 'Mean scores from 10 panelists; samples coded for evaluation; 1.0 poor, 9.0 = outstanding. 2Pericarp and shear press data from canned whole kernels after 2 minute drain; other determinations from fresh cut kernels. basis of graded husked ears; shear press data are lbs. maximum force for 100 gram samples. Cut-off % was on
Table 4. Sweet Corn Nitrogen, Variety, Spacing Test, Summary, 19751 No. Variety Yield 1/A Husked Ac ceptable E ars Ear Wt. % Lbs./Ear Moisture % Cut-off Plant Height (ft.) Harv. Date 1 Fanfare 6.8.67 75 65 8.1. 5 5 Jubilee 8.5.59 74 66 9.0 Sept. 8 13 Commander 8.8.71 73 66.9.6 Sept. 19 18 Rapidpak 6.4.55 73 64 7.4 Seat. 3 Sept Sept Tendertreat 9.8.62 73 61 10.8. 18 Sept Mainliner 7.0.59 76 58 11.0. 12 2008 7.9.66 78 66 9.8 Sept. 9 Sept 71-2291 7.3.52 75 67 9.0. 10 Spacing2 36x12 (14,500 p1/a ) 6.8.64 74 64 36x9 (19,300 p1/a 7.8.62 75 64 36x6 (29.000 tl/a 9.6.63 75 63 Nitrogen Level2 Ni 150# N/A 7.8.61 74 64 9.3 N2 300# N/A 8.5.66 75 64 9.3 1All varieties planted May 22; cut-off % based on husked ears; 2 N rates, 8 varieties, 3 spacings, 5 replications;individual plot - 1 row, 25 ft. long. Sources of additional varieties: Tendertreat (1), Mainliner (1), 2008 (5), 71-2291 (2). 2For each variety N spacing treatments were harvested on the same day. 6
Table 5. Head Smut Resistance of Sweet Corn Varieties at Scio, Oregon, 19751 No. Variety Source % Smut Infection Previous Years' Results2 Rep. 1 Rep. 2 Rep. Rep. 4 Mean 1973 1974 1 Fanfare 2 5.0 5.6 6.7 4.2 5.4 8 2 1805.2 11.1 3.6 23.8 12.0 12.6 3 7 1-2477 2 11.1 5.6 0.0 0.0 1.2 4 70-2162 2 76.9 14.3 15.4 25.0 32.9 5 Jubilee 2 0.0 9.1 0.0 4.6 3.4 11.4 2S 6 2580 7 0.0 0.0 0.0 0.0 0.0 9 NCX 2012 5 0.0 13.0 30.0 43.8 21.7 19 71-2291 0.0 4.5 0.0 0.0 1.1 1 20 72-1650 2 15.0 16.7 0.0 9.5 10.3 21 72-1652 2 4.6 4.8 4.6 12.5 6.6 22 72-1653 2 5.0 8.7 0.0 8.7 5.6 23 72-1683 2 0.0 0.0 0.0 0.0 0.0 24 23 81 2 0.0 0.0 10.5 0.0 2.6 25 Harmony 6 76.9 73.3 65.0 46.2 65.4 61 26 Sweet Sue 6 0.0 7.7 0.0 0.0 1.9 4.4 0 27 JL 49 6 5.3 0.0 0.0 0.0 1.3 1 28 Blitz 6 0.0 15.8 0.0 9.5 6.3 3.2 7 29 Sundance 6 35.3 68.8 33.3 61.9 49.8 54.2 56 30 NCX 2004 5 0.0 0.0 0.0 8.3 2.1 5.5 8 31 NCX 2007 5 5.0 0.0 0.0 0.0 1.3 4 32 NCX 2009 5 0.0 5.3 0.0 0.0 1.3 33 NCX 2011 S 17.7 13.0 16.7 22.2 17.4 34 NCX 2014 5 20.0 13.6 S.3 8.7 11.9 -r 35 Sprite 6 28.6 33.3 37.5 26.3 31.4 1Grown by Fred Robinson, commercial farmer, in a field with a long history of head smut infection. Each plots was about 24' long and contained 17-32 plants, except for a few where the stand was reduced by germination problems. Varieties 19-35 were not included in the yield trial at Corvallis. 2lncluded for reference to show the relative level of infection in 1975; mean % infection in the same field as current trial. 7
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