OF CORN HYBRIDS IN ILLINOIS

Transcription

1 I CIRCULATiNG COpy ---~--.-~. AGRICULTUi~E LldRAR'( 1970 PERFORMANCE OF CORN HYBRIDS IN ILLINOIS (WITH AVERAGES) 1;:- f. UNOIS ~Ci;,..G-. w,,.: UB'RARV ~. ~~a~s~~.l. Ross, ~on CIRCULAR 32 UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN COLLEGE OF AGRICULTURE COOPERATIVE EXTENSION SERVICE

2 CONTENTS PLAN OF THE TESTS MEASURING PERFORMANCE GROWING CONDITIONS ON 1970 TEST FIELDS SOURCES OF SEED RESULTS OF VARIETY TESTS Extreme Northern Illinois: Woodstock Northern Illinois: DeKalb West North-Central Illinois: Galesburg East North-Central Illinois: Elwood...27 West-Central Illinois: Augusta Central Illinois: Stanford East-Central Illinois: Urbana West South-Central Illinois: Greenfield...38 Southern Illinois: Brownstown...42 Extreme Southern Illinois Bottomland: Dixon Springs...46 Extreme Southern Illinois Upland: Carbondale...50 This circular was prepared by D. W. Grams, Associate Professor of Forage Crops Extension, G. L. Ross, Assistant Agronomist, and J. E. Dillon, Associate Agronomist. Data processing was done by the Statistical Laboratory of the Agronomy Department. R. D. Seif, Professor of Biometry, and S. G. Carmer, Associate Professor of Biometry, supervised the analysis and preparation of the data. Urbana, Illinois January, 1971 Issued in furtherance of Cooperative Extension Work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. JOHN B. CLAAR, Director, Cooperative Extension Service, University of Illinois at Urbana-Champaign.

3 "'\ ~ 'J \ 0 I \0:'~ CD ~ c='~ PERFORMANCE OF CORN HYBRIDS IN ILLINOIS, 1970 C ORN YIELDS IN ILLINOIS in 1970 are estimated to average 75 bushels per acre, or bushels less than the 1969 average production. A wet, cool spring delayed planting throughout the state. Some corn was planted as much as six to eight weeks later than normal and the prospects for record yields were "washed out" early in the growing season. Flooding, saturated soils, inability to apply herbicides at the right time, and side-dress nitrogen that was not applied preplant all hampered the growth and survival of the corn crop. A severe drouth during July and August in many areas of the state further reduced the yields while a wet October slowed harvest. An already potentially poor corn year received the "crowning blow" when a new race of southern corn leaf blight (Helminthosporium maydis T.) appeared. The disease was detected in some fields in late June and spread over the entire state during July, August, and September. The disease caused severe damage to nearly all hybrids produced by the male sterile system. Essentially all of the male sterility in corn hybrids marketed in 1970 was controlled by a particular cytoplasm that was discovered several years ago by geneticists in Texas and was named the Texas cytoplasm. This cytoplasm was very successful in transmitting male sterility to the next generation. The system "vas so effective in controlling fertile or sterile pollen that about 90 percent of all hybrids available in 1970 were produced by the male sterile system using the Texas source of male sterile cytoplasm. Unfortunately, a new race of southern corn leaf blight appeared through mutation or by some other unknown means. The new race was able to infect and grow rapidly on hybrids produced by the male sterile system using the Texas source of male sterile cytoplasm. The old race of southern corn leaf blight could infect these same hybrids but made little growth because of genetic resistance. A new disease, a large acreage of susceptible crop, and suitable climatic conditions for growth and spread of the disease resulted in one of the poorest com years in recent history. Fortunately, it is known that corn hybrids produced without using the Texas cytoplasm for male sterility are resistant to southern corn leaf blight race T. These hybrids have the ear parent rows detasseled by hand to remove their fertile pollen to prevent inbreeding. The pol

4 2 CIRCULAR NO. 32 len-bearing rows are present as in all seed production fields, providing pollen for the detasseled rows. Also, some of the hybrids produced with Texas male sterile cytoplasm have some resistance to southern corn leaf blight race T. The degree of resistance varies considerably among hybrids, but rarely are hybrids from male sterile parentage as resistant as hybrids from nonmale sterile (normal cytoplasm) parentage. The tahles in this circular list southern corn leaf blight rate T ratings for each hybrid entry. Use the leaf blight rating in conjunction with the yield of the hybrid in 1970 for a relative estimate of the leaf blight resistance. Notice that not all locations were equally severely infected. Do not compare )Iields or leaf blight ratings of a hybrid at one location with another hybrid at another location. Alake all comparisons within a test location. The leaf blight ratings were made in late August but some advance in leaf area damage occurred after this date. Thus the ratings should not be interpreted as the extent of the damage for the entire season. Yields for and for 1970 are presented separately to provide an indication of relative performance of hybrids both in the absence and the presence of southern corn leaf blight race T. Because the type of cytoplasm largely determines the resistance of hybrids to southern corn leaf blight race T, participating seed companies were asked to supply information on the type of cytoplasm in their entries in the tests reported in this circular. Hybrids using Texas male sterile cytoplasm are referred to as Tms cytoplasm. Hybrids without the Tms cytoplasm are referred to as normal cytoplasm, designated "N." Hybrids composed of a mixture of seeds, some from Tms and some from N cytoplasm, as referred to as a blend, designated "B." The cytoplasm source in the University of Illinois tests may have been different than that offered for sale to farmers in 1970 and may be different in Information on the cytoplasm sources for 1970 and on plans for 1971 is given in Table 3. Use this information when evaluating the leaf blight ratings and yields obtained in If the cytoplasm source is unknown (unsure), the designation "U" is used. PLAN OF THE TESTS Selection of entries. Each year all producers of hybrid seed corn in Illinois and surrounding states are invited to enter hybrids in the Illinois performance trials. To finance this testing program, a fee is charged for each hybrid entered by seed companies. Most of these

5 PERFORMANCE OF CORN HYBRIDS hybrids are commercially available, but seed companies occassionally enter experimental hybrids for testing. Number and location of tests. In 1970, 18 major tests were carried on at 11 locations in the state (see map on page 7). These sites were chosen to represent major soil and climatic areas of the state. Hybrids. This year over 360 hybrids were tested, including entries from 46 companies. The seed companies supplied seed of their entries. Field-plot design. Each test was set up in either randomized complete block or lattice designs. These arrangements are practical and efficient and give each hybrid an equal chance to show its merits. Planting methods. All trials were planted by machine except those at Woodstock and Augusta, which were planted by hand to obtain an earlier planting. All test fields except those at DeKalb, Urbana, Brownstown, and Carbondale were part of larger corn fields and were surrounded by market corn. Plots were kept small to avoid differences due to soil variation. Each individual plot was three rows, 26 feet long. The center row of each plot was harvested to check performance. All plots were overplanted 30 percent and later thinned to desired stand. Fertilization. In general, all test fields were at a high level of fertility. Additional fertilizer was plowed down or side-dressed as needed to assure top yields. Method of harvest. All plots were harvested mechanically with a self-propelled corn-head combine. Shelled corn from each plot was collected, weighed, and tested for moisture percentage. No allowance was made for shelled corn that might have been lost in harvest. MEASURING PERFORMANCE It sometimes happens that hybrids too late in maturity for a given area are entered in the tests. While such hybrids often are high in yield, their high moisture content might make them unsafe choices for use unless proper drying or storage facilities are available. Therefore, the hybrids in the average are listed in the order of their kernel moisture with lowest moisture listed first. Yield of grain. Shelled-corn weight and moisture percentage were measured for each plot of a hybrid and converted to yields of No.2 shelled corn (15.5 percent moisture). An electronic moisture tester was used for all moisture readings.

6 Erect plants. The number of erect plants in each plot of a hybrid was counted at harvest time. Any plant leaning at an angle of more than 45 degrees or broken below the ear was considered lodged. broken above the ear were considered erect. Stand. In late June, plants in all plots on all fields were counted and the percent of stand was computed by comparing this number with the number of kernels planted. Plots with over 0 percent stand were thinned at this time. Stand differences may be caused by failure to germinate or by disease, insect injury, or cultivation damage. per acre. per acre was calculated for each plot by using the percent stand obtained from plant counts. Differences in plants per acre are caused by the same factors that cause differences in percent stand. Blight infection. The observations were noted during the last week of August. A reading of zero indicates no blight visible. A reading of 5 to indicates blight visible but little or no growth. Higher readings indicate sensitivity to blight and the amount of infection on the plants. A number of hybrids were observed as being blends of Nand Tms cytoplasm and were averaged. Drouth caused premature dying of corn at the Elwood field and prevented reliable leaf blight ratings. 40-inch rows, 18,000 plants per acre bu. Perct. perct. Woodstock: McHenry, Ex. N, May 21 Oct Augusta: Hancock, WC, May 29 Nov. 3 Urbana: Champaign, EC, May 22 Oct. 16 Brownstown: Fayette, S, May 18 Oct inch rows, 18,000 plants per acre, , , ,900 DeKalb: DeKalb, N, May 5 Oct ,500 Greenfield: Macoupin, WSC, May 19 Sept Carbondale: Jackson, Ex. S, Dixon Springs: Pope, Ex. S, inch rows, 22,000 plants per acre , ,700 May 25 Oct May 27 Oct ,400 Brownst own: Fayette, S, May 18 Oct ,600 Carbonda le: Jackson, Ex. S, May 25 Oct , inch rows, 24,000 plants per acre DeKalb: DeKalb, N, May 5 Oct. 22 Elwood: Will, ENC, Stanford: McLean, C, May Oct. 30 Urbana: Champaign, EC, Greenfield : Macoupin, WSC, May 19 Sept Dixon Springs: Pope, Ex. S, inch rows, 18,000 plants per acre , 900 May 7 Oct , ,500 May Oct , ,900 May 27 Oct ,700 Galesburg: Knox, WNC, May 8 Nov , inch rows, 24,000 plants per acre Galesburg: Knox, WNC, May 8 Nov ,600 Date Aver. Mois Aver. har Lodged acre ture in populavested yield grain plants tion Field, county, location, Date and number of entries planted CIRCULAR NO. 32 Table 1. - General Information: Illinois Hybrid Corn Tests, 1970 "

7 PERFORMANCE OF CORN HYBRIDS Comparing hybrids. In any test of plant material, it is impossible to measure performance exactly. Samples may vary, soils may not be uniform, and many other conditions may produce variability. Results of repeated tests, like those reported in this circular, are more reliable than those of a single year or a single strip test. In general, a yield difference of a few bushels per acre is not significant in these tests. When one hybrid consistently out yields another at several test locations and over several years of testing, the chances are good that this difference is real and should be a consideration in choosing a hybrid. But yield alone is not enough. Consider also the grain moisture content, percentage of erect plants, percent stand, or plants per acre in comparing hybrids. As an aid to comparing hybrids, certain statistical tests have been devised. D. B. Duncan l has outlined an approach to the problem of multiple comparisons when only two means are compared among a set of hybrid means. Certain factors not accounted for in previous tests of this type are included in Bayes L.S.D. This test is applied in the same manner as previous statistical tests used in these circulars. When two hybrids in a trial are compared, and the difference between them is greater than the tabulated L.S.D. value, then the hybrids are said to be "significantly different." GROWING CONDITIONS ON 1970 TEST FIELDS Extreme Northern Illinois: Woodstock. This test field represents the cool, humid area in northeastern Illinois. The test plot is on land operated by the Hughes Farms and Seed Co. The soil type is Proctor silt loam, a fertile, deep, well-drained, dark prairie soil. This plot was in a field of third-year corn. Northern Illinois: DeKalb. This test is on the University's Northern Illinois Research Center near Shabbona in DeKalb County. R. E. Bell is field manager of the research center. The soil type is Flanagan silt loam, a dark-brown, adequately drained soil of high fertility. The rotation used is a corn-corn-oats-clover rotation. The high planting rate test was in first-year corn. The low planting rate was in second-year corn. The field was wet and cold at planting time and high-population stands were reduced on some of the hybrids. West North-Central Illinois: Galesburg. This test is located on the Hawkinson Farms, operated by Harold and Dave Hawkinson. The test field represents the highly fertile, heavy-textured, Sable silty clay loam of the area. The plot was in a field of third-year corn. Cold, 1 Duncan, D. B., "A Bayesian Approach to Multiple Comparisons," Technometrics, 7:1-222,1965.

8 6 CIRCULAR NO. 32 Table 2. - Growing Season Rainfall Field May June July August inches Woodstock DeKalb Galesburg Elwood Augusta Stanford Urbana Greenfield Brownstown Carbondale Dixon Springs wet weather in early May reduced some of the high-population stands. The field was damaged in mid-august by hail. East North-Central Illinois: Elwood. This plot was moved from the Ashkum area to the Elwood Research Center in The Elwood field is in Will County and Dale Harshbarger is the field manager. The soil is a Drummer silty clay loam. The field suffered from a severe midsummer drouth. West-Central Illinois: Augusta. This test is located on the William Finney farm, west of Augusta in Hancock County. The soil is Harrison silt loam, a moderately well-drained, dark grayish-brown prairie soil. The area was wet all spring causing a delay in planting. Adequate rainfall throughout the growing season resulted in good corn yields in spite of the late May planting. Central Illinois: Stanford. During the past four years, this field has been located on a farm operated by Howard Logsdon in the western part of McLean County. The soil is a deep, well-drained, fertile Muscatine silt loam. The area was wet in the spring and most of the planting was done two weeks later than the year before. East-Central Illinois: Urbana. This test is located on the Agronomy South Farm of the University of Illinois at Urbana-Champaign in Champaign County. M. G. Oldham is the farm manager. Fields on which the test plots were grown are level, heavy-textured Drummer silty clay loam. The conventional 40-inch trial and 30-inch trial were in the second year of corn of a corn-corn-oats-alfalfa rotation. West South-Central Illinois: Greenfield. This test represents the moderately poorly drained, level soils of western south-central Illinois. The soil type is Herrick silt loam. It is located on the C. H. Ross, Jr. farm northeast of Greenfield in Macoupin County.

9 PERFORMANCE OF CORN HYBRIDS Southern Illinois: Brownstown. This test is located on the University's Brownstown Experiment Field in Fayette County. The soil is Cisne silt loam, a poorly drained, gray prairie soil with a welldeveloped claypan. Natural fertility of the soil is not high. Arden Christensen is the area agronomist in charge of the field. Extreme Southern Illinois Bottomland: Dixon Springs. This test was located at the Dixon Springs Agricultural Center in Pope County. The test plot is on an area of Sharon silt loam, which is a light-colored moderately well-drained to well-drained, medium-textured bottomland soil. Fertility of this field is high. G. E. McKibben is the area agronomist in charge of this field. The field had a severe infection of leaf blight early in August. Extreme Southern Illinois Upland: Carbondale. The test at Carbondale represents a typical upland area in southern Illinois. This test was carried on at the Southern Illinois University and University of Illinois Agronomy Research Center, where Roy Browning is superintendent. The soil types are classified as Weir and Stoy silt loams, which are rather shallow, silty soils over c1aypan. The growing season started normally and in early July it appeared that there would be an ideal crop. However, by August 1 the summer drouth had already done its damage. Many varieties that did not set seed were noted and the leaf blight was active. Location of 1970 test fields.

10 8 CIRCULAR NO. 32 SOURCES OF SEED ACCO Seed...Anderson-Clayton... Belmond, Iowa Ainsworth Hybrids... Ainsworth Seed Co..... Mason City ASGROW Hybrids...ASGROW Seed Co Clinton Ave., Des Moines, Iowa Bear Hybrids... Bear Hybrid Corn Co Box 628, Decatur Blaney Hybrids... Blaney Farm, Inc R. R. 4, Madison, Wis. Bo-Jac Hybrids.... Bo-Jac Hybrid Corn Co... Mt. Pulaski Burgdorf's Hybrids... Burgdorf's Seed Co W. Broadway, Evansville, Ind. c.r. Seed... Central Illinois Seed Inc R. R. 6, Springfield Coop Hybrids Farmland Industries, Inc... P.O. Box 7305, Kansas City, Mo. Cornelius Hybrids... Cornelius Seed Corn Co Bellevue, Iowa Corn King Hybrids... Malcolm H. Grieve Pierson, Iowa Dittmer Hybrids Dittmer Seeds... Carthage Dockendorff Hybrids.... Max Dockendorff... Danville, Iowa Farmers Union Hybrids... Farmers Union Seed Co Cedar Falls, Iowa Forster Hybrids Conrad, Inc..... Box 88, Houghton, Iowa Frey Hybrids...Frey Hybrid Corn Co., Inc Gilman Gutwein Hybrids...Fred Gutwein & Sons Francesville, Ind. Hoblit Hybrids... Hoblit Seed Co Atlanta Holden Hybrids... Holden Foundation Hybrids..... Williamsburg, Iowa Hughes Hybrids... Hughes Hybrids, Inc Woodstock Lewis Hybrids...Frank W. Lewis & Son Seed Farms... Ursa McAllister Hybrids..... McAllister Seed Farms... Mount Pleasant, Iowa McNair Hybrids..... McNair Seed Co P.O. Box 706, Laurinburg, N.C. Migro Hybrids Midwest Seed Growers Assn., Inc... Mitchell, Ind. Moews Hybrids... Moews Seed Co Granville Northrup-King Hybrids... Northrup, King & Co Jackson St., N.E. Minneapolis, Minn. O's Gold Hybrids O's Gold Seed Co., Inc... R.R. 2, Parkersburg, Iowa Pioneer Hybrids Pioneer Hi-Bred Corn Co. of Illinois Princeton Pocklington Hybrids... Pocklington Bros R.R. 2, Girard Prairie Stream Hybrids... Prairie Stream Farm, Inc... "... Frankfort, Ind. Princeton Hybrids... Princeton Farms Box 319, Princeton, Ind. Renk Hybrids...Wm. F. Renk & Sons Co., Inc...Sun Prairie, Wis. Schenk's Hybrids... Charles H. Schenk & Sons, Inc... Vincennes, Ind. Sieben Hybrids..... Sieben Hybrids... Geneseo Stewart Hybrids....Stewart Hybrids Inc Princeville Stull Hybrids......Stull Brothers, Inc...Sebree, Ky. Super-Crost Hybrids....Edw. J. Funk & Sons Kentland, Ind. Taylor-Evans Hybrids...Taylor-Evans Seed Co Tulia, Texas Todd Hybrids Todd Hybrid Corn Co Burlington, Ind. Tracy Hybrids...Tracy Seed Farms R. R. 1, Janesville, Wis. Tri. Co. Hybrids......Tri. Co. Seed Corn Co... Ridgway Trisler Hybrids......Trisler Seed Co Fairmount Trojan Hybrids...Trojan Seed Co Box 367, Windfall, Ind. Van Horn Hybrids...Van Horn Hybrids, Inc..... Cerro Gordo Victor Hybrids Polo Seed Co... Polo Whisnand Hybrids...Whisnand Hybrid Corn Co... R. R. 3, Arcola

11 PERFORMANCE OF CORN HYBRIDS Table 3. - Cytoplasm Types of Varieties in 1970 and 1971 Plans Cytoplasm typea in 1970 Plans for this hybrid in 1971 Brand Variety U. of I. Commercial For Cytoplasm t ypea tests sales sale? ACCO TGG933 Tms Tms Yes 'rms ACCO TGG956 ACCO U333 ACCO U343 Tms Tms Yes 'rms ACCO U353 ACCO U363 ACCO U383 ACCO UC00 Tms Tms Yes N & Tms ACCO UC2700 ACCO UC3300 Tms Tms Yes N & Tms ACCO UC3600 ACCO UC4500 ACCO UC4600 ACCO UC50 ACCO UC6000 ACCO UC8500 ACCO UC8800 ACCO UC8900 Ainsworth X-9 Ainsworth 0344 Tms Tms No Ainsworth 0354 Tms Tms No Ainsworth 0384 Trns Tms No Ainsworth 0793 Ainsworth 4473 Blend Blend Yes B 50% N & 50% Tms Ainsworth 4473A Tms Tms No Ainsworth 4773 Ainswor th 6507 Blend Blend Yes B 30% N & 70% Tms Ainswor th 7332 Ainsworth 7348 Blend Blend Yes N Ainswor th Blend Blend Yes N Ainswor th 8493 Blend Blend Yes N & Tms Ainsworth 8773 No r mal Normal Yes.N & 'rms Ainsworth 8795 Normal No r mal No Asgrow ASC97 Asgrow IXL9 No r ma l Normal Yes N Asg row RX94 Bear 459 Tms None No Bear 876 Tms None No Bear Unicorn X405 Tms None Yes Tms Bear Unicorn X405E Tms None No Bear Unicorn X4 Bear Unicorn X4E Nor mal None No Bear Unicorn X495 No r mal None No Bear Unicorn X666 Tms None No Bear Unicorn X672 Tms None No Bear Unico rn X845 Tms None Yes Tms Bear Unicorn X872 Normal Tms Yes Tms Bear Unicorn X4686 Tms None No Bear Unicorn X6157 Normal None No Bear Unicorn X8333 Tms None No Blaney B601 Blaney 6616 Tms 'rms Yes Tms Blaney B401 Blaney B501A Blaney Double A Tms 'rms Yes Tms Bo-Jac 3451 Tms 'rms Yes Tms Bo-Jac XIA Blend Blend Yes Tms Bo-Jac XI- 82 Tms Tms No Bo-Jac XI-83 Blend Blend Yes B 50% N & 50% Tms Bo- Jac XI-92 Blend Blend No Bo-Jac X2E an = Normal; B = Blend; Tms = Texas male sterile ; U = Unsure.

12 CIRCULAR NO. 32 Table 3. - Cytoplasm Types, continued Cy toplasm type a in 1970 Plans for this hybrid in 1971 Brand Variety U. of I. Commercial For Cytoplasm type a tests sales sale? Bo-Jac X3 Unsure Unsure Unsure Bo-Jac X5 Blend Blend Yes Tms Bo-Jac X7 Blend Blend No Bo-Jac X7L Blend Blend Yes Tms Bo-Jac X9 Normal Normal Yes Normal Bo-Jac X12E Bo-Jac X15 Blend Blend Yes Tms Bo-Jac X15E Blend Blend Yes Tms Bo-Jac X Bo-Jac X5l Blend Blend Yes B 35% N & 65% Tms Bo-Jac X53 Blend Blend Yes N Bo-Jac X70 Bo-Jac X97 Tms Tms No Bo-Jac X5 Burgdorf B-99-AW Burgdorf B-837Y Burgdorf B-846Y. Burgdorf B-922\o1 Central Illinois C. I. 40 Central Illinois C. I. 47 Central Illinois C. I. 04 Coop. S-5 Coop. S-304 Normal Normal Yes N Coop. T-308 Tms Tms Yes N Cornelius 333X Tms Tms Unsure N Cornelius 363X Tms Tms Unsure Tms Cornelius 373X Cornelius 383X Cornelius CSX40 Cornelius SX36A Blend Tms Yes Tms Corn King 1122 Blend Blend Yes N & Tms Corn King 1155 Normal Normal Yes N Dittmer D-803 Dittmer D-8 Dockendorff D12 Dockendorf f D Farmers Union 004 Tms Tms Unsure Farmers Union 007 Tms Tms Unsure Farmers Union 25 Tms Tms Unsure Farmers Union 60 Tms Tms Unsure Farmers Union 66 Tms Tms Unsure Farmers Union SX55A Tms Tms Unsure Forster 360X Forster 4X Fors ter 4X Tms Tms No Forster 430X Normal Normal Yes N Forster 695 Frey F49 Frey F58 Frey F60 Frey FX55 Frey FX80 Tms Tms No Gutwein loa Tms Tms No Gutwein Gutwein 69A Blend Blend Yes Tms Gutwein 87A Cutwein 1 Gutwein EX25 Blend Blend Yes B 25% N & 75% Tms Hoblit XR445 Blend Blend Yes N Hoblit XR446 Unsure Blend & Tms Yes B 50% N & 50% Tms an = Normal; B ":' Blend; Tms = Texas male sterile; U = Unsure.

13 PERFORMANCE OF CORN HYBRIDS Table 3. - Cytoplasm Types, continued Brand Variety Cytoplasm typea in 1970 Plans for this hybrid in 1971 U. of I. Commercial For Cy toplasm type a tests sales sale? Hoblit Holdens Holdens Holdens Holdens Holdens Holdens Holdens Holdens Holdens liughes Hughes Hughes Hughes Hughes Hughes Hughes Hughes Lewis Lewis Lewis Lewis Lewis Lewis Lewis Lewis Let,is NcA11ister HcAllister HcA11ister NcA11ister ~!CA llis t er HcAllister NcAllister NcA11ister HcA11ister NcA11ister ~!CAllis t e r NcNair Nigro Nigro Higro Nigro Noe\;s Hoews Hoews Hoews Noews Moe\;s Hoews Hoews Hoews Hoews Noews Noews Hoews Noews Hoews Moews Hoews XR448 Exp. 001 Exp. 025A Exp. 033A Exp. 035 Exp. 01 Exp. 03 Exp. 04 Exp. 05 Exp. 06 Exp. -2 Exp SLX6 SLX8 SLX SLXA SLX27 SLX3l X- 9 X-16 X-58B X- 68B X- 78 X- 80 HX- 630l sx- 66 sx SX SX-6832 SX-6837 SX-684l SX- 686l SX-6883 SX TX-747 Exp H- 40SX M- 44SX M-540 M-lOlOSX M33 H3359W M338 l H34 H6378 H639 l H729l H7372 M7730 H828l N8283 N878l Sup I r Haiz 44 Sup I r Maiz 2 Sup I r Haiz 229 Sup I r Haiz 327 Sup I r Haiz 4 29 No r ma l Experimental No Tms Experimental No Tms Experimental No No rmal Experimental No No rmal Experimental No Normal Experimental No Normal Experimental No Tms Experimental No Normal Experimental No Blend Blend Yes B 25% N & 75% Tms Tms Experimental No Tms Experimental No Blend Blend Yes B Normal Experimental No No r ma l Normal Yes N Tms Tms No Bl e nd Tms Yes Tms Tms None No Tms None No No r mal None No No rma l Normal Yes Tms None No No r ma l Experimental No Tms Tms No Tms Tms No Tms Tms No No r mal None No Tms Tms No Normal None No No r ma l None No No r ma l Tms Yes Tms Normal Tms Yes Tms an : No r mal; B : Blend; Tms : Texas male s t erile ; U Unsur e.

14 12 CIRCULAR NO. 32 Table 3. - Cytoplasm Types, continued Cytoplasm typea in 1970 Plans for this hybrid in 1971 Brand Variety U. of I. Commercial For Cytoplasm typea tes ts sales sale? Hoews Sup'r Maiz 438 Moews Sup'r Haiz 5 Hoews Sup'r Haiz 6 Hoews Sup'r Haiz 721 Moews Sup'r Haiz 730 Northrup-King KT680 Northrup-King PX50 Tms Blend & Tms Yes N & Tms Northrup-King PX545 Tms Tms Yes N & Tms Northrup-King PX6l0 Tms Tms Yes N & Tms Northrup-Kiflg PX6l6 Tms Tms Yes N & Tms Nor thrup-king PX678 Normal N & B & Tms Yes N & Tms O's Gold 10 O's Gold 5500 Pioneer 309B Tms Tms Yes B 50% N & 50% Tms Pioneer 35 Blend None No Pioneer 3196 Unsure None No Pioneer 3199 Blend None Yes B 50% N & 50% Tms Pioneer 32 Tms None No Pioneer 3300 Blend None Yes B 50% N & 50% Tms Pioneer 3304 Tms Tms Yes B 50% N & 50% Tms c, Tms Pioneer 3306 Pioneer 3307 Blend None Yes Tms Pioneer 3308 Unsure None Yes B 50% N & 50% Tms Pioneer 3334 Normal Normal Yes N Pioneer 3365 Tms Tms No Pioneer 3369A Blend Blend Yes N & B 50% N & 50% Tms Pioneer 3376 Blend Blend Yes N & B 50% N & 50% Tms Pioneer 3387 Unsure None Yes B 50% N & 50% Tms Pioneer 3388 Blend Blend Yes N & B 50% N &' 50% Tms Pioneer 3390 Blend None Yes B 50% N & 50% Tms Pioneer 3505 Unsure Blend & Tms Yes B 50% N & 50% Tms & Tllis Pioneer 3516 Blend Blend Yes N & B 50% N & 50% Tms Pioneer 3519 Pioneer 3548 Unsure None No Pioneer 3567 Blend Blend Yes N & B 50% N & 50% Tms Pioneer 3570 Blend Blend Yes B 50% N & 50% Tms Pioneer 3571 Blend Blend Yes N & B 50% N & 50% Tms Pioneer 3579 Tms Tms Yes N & B 50% N & 50% Tms Pioneer 3773 Blend Blend Yes N & B 50% N & 50% Tms Pioneer 873 Normal None No Pioneer Xl9 Normal None No Pioneer X66 Normal. None No Pioneer X2473 Normal None No Pioneer X4l96 Normal None No Pioneer X5349 Unsure None No Pioneer X5754 Normal None No Pioneer X6666 Normal None No Pioneer X7648A Blend None Yes B 50% N & 50% Tms Pioneer X7650 Blend None Yes B 50% N & 50% Tms Pioneer X800l Normal None No Pioneer X8004 Normal None No Pioneer X8758 Normal None No Pioneer XTP Normal None No Pocklington P-440 Pocklington P-442 Tms Tffis Yes Tms Pocklington P-660 Pocklington P-715 Pocklington P-74l Pocklington P-780 Pocklington P-793 Tms Tms Unsure an ~ Normal; B ~ Blend; Tms = Texas male sterile; U ~ Unsure.

15 PERFORMANCE OF CORN HYBRIDS 1970 Table 3. - Cytoplasm Types, continued Brand Variety Cytoplasm typea in 1970 U. of I. Commercial Plans For t es ts sales sale? for this hybrid in 1971 Cytoplasm typea Pocklington P-8A Tms Tms No Pocklington P-818 Pocklington P-891 Tms Tms No Pocklington P-6341 Tms Tms Yes N & Tms Pocklington P-7361 Tms Tms No Pocklington P-7441 Tms Tms Yes N Pocklington P-7661 Tms Tms Yes N & Tms Pocklington U. S. Tms Tms No Prairie Stream SXIB Princeton 833 Princeton 940 Tms Tms No Princeton 960 Princeton 990B Princeton 06 Princeton SX-606 Princeton SX-650 Normal None Yes B Princeton sx-690 Princeton SX-803 Princeton SX-804 Princeton SX-8 Princeton SX-836 Blend Blend Yes Tms Princeton SX-850 Blend Unsure Yes N Renk RK33 Renk RK44 Schenk S-73A Schenk S-96W Schenk SS-66 Schenk SS-88A Schenk SS-98W Schenk SS-X8 Schenk SS-XIOIW Normal Normal Yes N Sieben 22-XS Sieben 25-XS Sieben 28-XS Sieben 29 -X3 Sieben 33-X3 Si~ben 51-SX Stewart S-382 Stewart SX-47 Stewart SX-58 Stewart SX-71 Stewart SX-77 Stull 500W Stull 550W Stull 6SX Stull 627TX Stull 707 Stull 707SX Stull 7ASX Stull 7SX Stull 800W Stull 807 Stull 807A+SX Stull 807SX Stull 808SX Super-Crost 3 Tms Tms Yes N & Tms Super-Crost 593 Super-Crost S-27 Super-Crost S-29 Super-Cros t S-59 Tms Tms Yes N & Tms an = Normal; B = Blend; Tms = Texas male sterile; U = Unsure.

16 14 CIRCULAR NO. 32 Table 3. - Cytoplasm Types, continued Cy toplasm type a in 1970 Plans for this h:z:brid in 1971 Brand Variety U. of l. Commercial For Cy toplasm type a tests sales sale? Super-Cros t S-65 Blend None Yes BTms&U Super-Cros t S-69 Blend Blend & Tms Yes BTms&U Super-Cros t S-75 Super-Cros t S- 85 Blend Blend & Tms Yes B Tms & U Super-Cros t S- 86 Super-Cros t S-2569 Blend None Yes B U Super-Cros t S-6369 Blend None Yes Taylor-Evans 69 Tms Tms No Taylor-Evans Bonusmaker Taylor-Evans Cashmaker Taylor-Evans EYA Todd M25 Tms Tms Yes N Todd M30 Tms Tms Yes N Todd M55 Tms Tms Yes Todd H70 Tms Tms Yes Todd M90 Tms Tms Yes Todd M95 Tms Unsure Unsure U Tracy 6SX Tms Tms Yes N & Tms Tracy 9SX Tracy 307 Tri. County DC2525 Tms Tms No Tri. County SC2600 Tms Tms No Trisler T-16 Trisler T-18 Trisler T- Trisler T-324 Trisler T-326 Trisler T-328 Trisler T-890 Trisler T-906 Trisler T-934 Normal No rmal Yes N Trisler T-940 Normal Normal Yes N Trojan M1l2 Tms None Yes Tms Trojan N1l4 Normal Tms Yes Tms Trojan TXl04 Normal Tms Yes Tms Trojan TX1 No rmal Tms Yes Tms Trojan TX1l9 Normal None Yes Tms Trojan TXSl02 Normal Tms Yes N & Tms Trojan TXSl03 Trojan TXSl04 Normal Normal & Tms Yes N & Tms Trojan TXSl05 Trojan TXSl07 Normal Tms Yes Tms Trojan TXSl08 Normal Tms Yes Tms Trojan TXS1l2 Tms None No Trojan TXS1l5 Normal Tms Yes Tms Trojan TXS1l9 Tms None Yes N Trojan TXS1 Normal None Yes N Van Horn CAP43 Normal Normal Yes N Van Horn CAP14l Van Horn CAP9 Tms Blend Yes N & B 50% N & 50% Tms Van Horn Exp No rmal None No Van Horn Exp Normal None No Van Horn Exp No rmal None No Victor 93-VS Victor 95-VS Victor l50-vs Whisnand 851 Whisnand 851M Whisnand 868 Whisnand 871 Whisnand 874 an = Normal; B = Blend; Tms - Texas male sterile; U = Unsure.

17 PERFORMANCE OF CORN HYBRIDS Table 4. - Extreme Northern Illinois: Woodstock (Planted at 18,000 plants per acre in 40-inch rows) TOTAL ACRE GRAIN ERECT PLANTS ENTRY YIELD MOISTURE PLANTS PER ACRE SUMMARY BU. PERCT. PERCT. CORNE LIUS 333X MOEWS SM229 (2281) PIONEER MOEWS SM9 (3339) CORN KING HUGHE S SLX NORTHPUP-KING PX HUGHES SLX CO~NELIUS C-36SX MOEWS SUPR MAn NORTHRUP-KI NG PX NORTHRUP-K ING PX PIONEER PIONEER PIONEER PIONEER AV. OF ALL ENTRIES ' 877 L.S.D M.S.

18 16 CIRCULAR NO. 32 Table 4. - Woodstock, continued SUMMARY: 1970 Tota1 Acre Grain Lodged Brand Variety Bligh t Yie Id Moisture Per Acre bu. perct. perct. perct. ACCO. U ls000 ACCO.. U W4.2 S ls ACCO. UC S 500 ACCO.... UC S 11 S00 30 ACCO UC ACCO.. UC Ainsworth W ls000 Ainsworth S 700 Ainsworth.. 734S... 1~ 25.5 S 0 1 Cornelius X ls000 Corne lius SX36A ls000 Corn King S.2 11 ls000 Hughes... SLX Hughes. SLXA S00 Hughes. SLX ls000 Moews.... Sup'r Maiz Moews. Sup'r Maiz ls000 Moews... Sup'r Mai z S Northrup-King. PX W Northrup-King PX ~ Northrup-King.. PX ls000 O's Gold S00 Pioneer ~1.S Pioneer W5.4 S00 33 Pioneer Pioneer Pioneer Pioneer S ls000 Pioneer W Pioneer S Pioneer. X764SA Pioneer XS75S Super-Crost WS Super-Crost,. S S 14 Super-Crost. S Tracy... T6SX Tracy T WS ls Victor 95-VS ~ Victor VS Average of entries L. S. D N.S. N.S. 4

19 PERFORMANCE OF CORN HYBRIDS 1970 Table 5. - Northern Illinois: DeKalb (Planted at 18,000 plants per acre in 30-inch rows)a ENTRY TOTAL ACRE YIELO GRAIN MOISTURE ERECT PLANTS PLANTS PER ACRE SUMMARY BU. PERCT. PERCT. NORTHRUP-KING PX5BO FARMERS UNION SX55A BLANEY DOUBLE A CORNELIUS 373X HOLDEN 0 MOEWS SM9 (3339) NORTHRUP-KING PX47 PIONEER BLANEY B-601 NORTHRUP-KING PX50 PIONEER 3548 (X2193) PIONEER 3570 SIEBEN 51-SX ~C ALLISTER TX303 MIGRO M540 ACCO UNI-CROSS PIONEER X66 PIONEER 3567 MC ALLISTER SX66 MOEWS SUPR MAIl 327 PIONEER 3365 PIONEER 3376 (XI002' ACCO UNI-CROSS AV. OF ALL ENTRIES l.s.d N.S. 568 N.S. a Planted in 40-inch rows in 1968.

20 18 CIRCULAR NO. 32 Table 5. - DeKalb, continued SUMMARY: 1970 Brand Variety Tota 1 Acre Yie Id Gra in Moisture Lodged Per Acre Blight bu. perct. perct. perct ACCO U ACCO U ACCO UC ACCO... UC , ACCO UC ACCO UC ACCO... UC Ainsworth Ainsworth Ainsworth Blaney Blaney B Blaney... B50lA Blaney... B Blaney... Double A Cornelius X Corne1ius X Farmers Union Farmers Union... 55A... III 21.8 Hughes SLXA Hughes... SLX Hughes... SLX McAllister SX Migro.... '.... M Migro M-SX Moews... M Moews Sup'r Maiz Moews... Sup'r Maiz Moews... Sup'r Maiz O's Gold ' Pioneer Pioneer Pioneer Pioneer Pioneer , Pioneer Pioneer Pioneer X Pioneer.. X Pioneer... X Trojan... TXS Trojan... TXS Trojan... TXS Tro jan... TXS Trojan... TXS Trojan... TXSI Average of entries... L. S. D... l N.S.

21 PERFORMANCE OF CORN HYBRIDS Table Sa. - Northern Illinois: DeKalb, Increased Planting Rate (Planted at 24,000 plants per acre in 30-inch rows) ========================================================================. TOTAL ACRE GRAIN ERECT PLANTS ENTRY YIELD MOISTURE PLANTS PER ACRE SUMMARY < BU. PERCT. PERCT. BLAN EY GUTWEIN 1q ll HUGHES SLX MOEWS HOLDEN IllANEY B FARMERS UNION SX55A SUPER-CROST S SUPE R-CRQST S TRACY 6 SX S LANEY DOUBLE A HUGHES SLX NORTHRUP-KI NG PX CORNF.lIUS C-36SX "1C ALLI STER TX PIONEER X BO-JAC X2E TODD M JAC X30E ACCO U PIONEER ,",OEWS SUPR MAIl PIONEER SIEBEN 51-SX SUPER-CROST PIONEER n 300 BO-JAC X4 IX44) MC AL LI STER SX POCKLINGTON P ' CORNELIUS 3X ACCO UNI-CROSS PIONEER ' PIONEER POCKLINGTON P ACCO UNI-CROSS PIONEER POCKllNGTON P AV. OF All ENTRIES l.s.d N.S. N.S.

22 CIRCULAR NO. 32 Table 5a. - DeKalb, Increased Planting Rate, continued Brand Variety SUMMARY: 1970 Total Acre Yield Grain Moisture Lodged Per Acre Blight bu. perct. perct. perct. ACCO. UC ACCO UC ACCO UC ACCO UC ACCO UC ACCO UC Ainsworth Ainsworth Ainsworth Blaney Blaney.. B Blaney. B50lA Blaney B Blaney. Double A Bo-Jac X Cornelius X Cornelius 373X Cornelius CSX Corne lius. SX36A Farmers Union Farmers Union Farmers Union. SX55A Gutwein. loa Gutwein. EX Holden Exp Holden. Exp. 025A Holden Exp Hughes Exp Hughes Exp Hughes SLX Hughes SLX Hughes. SLX Hughes SLXA McAllister. SX McAllister SX McA11ister. SX Migro M Migro. M-IOIOSX Moews... M Moews. Sup'r Maiz Moews.. Sup'r Maiz Northrup-King PX Northrup-King.. PX Northrup-King. Px ' s Gold "., Pioneer Pioneer Pioneer Pioneer Pioneer

23 PERFORMANCE OF CORN HYBRIDS Table 5a. - DeKalb, Increased Planting Rate, continued SUMMARY: 1970 Brand Variety Total Acre Yie Id Grain Moisture Lodged Per Acre Blight bu. perct. perct. perct Pioneer Pioneer.... X Pioneer X7648A Pioneer X Pioneer X Pocklington.... P Prairie Stream... Goldencross SXIB Renk RIG Renk RK Sieben XS Sieben XS Sieben XS Sieben XS Sieben l-SX StulL SX StulL TX Stull SX :9 Stull SX Super-Crost Super-Crost Super-Crost..... S Super-Crost... S Super-Crost.... S Super -Cros t... S Super-Crost.. S Todd M Todd.. M Todd... M Tracy... 6SX Tracy.. 9SX Victor. 93-VS Average of entries L. S. D

24 22 CIRCULAR NO. 32 Table 6. - West North-Central Illinois: Galesburg (Planted at 18,000 plants per acre in 28-inch rows)a =====:~=============================================== ================== TOTAL ACRE GRAIN ENTRY YIELD MOISTURE ERECT PLANTS PLANTS PER ACRE SUMMARY BU. PERCT. PERCT. PIONEER NORTHRUP-KING PX PIONEER PIONEER 3376 (X02) ~OEWS HOBLIT XR ILL. ALEXHO 748 X R802A WHISNAND PIONEER PIONEER BEAR UNICORN X PIONEER X AINSWORTH BEAR UNICORN X BEAR UNICORN X MOEWS JoWA-~ISSOURI SX CORN KING MC ALLISTER SX ACCO MOEWS MC ALLISTER SX ASGRoW IXL9 (5S570) AV. OF ALL ENTRIES L.S.D ) a Planted in 38-inch rows in 1968.

25 PERFORMANCE OF CORN HYBRIDS 1970 Table 6. - Galesburg, continued Brand Variety SUMMARY: 1970 Total Acre Yield Grain Moisture Lodged Per Acre Blight bu. perct. perct. perct. ACCO TGG ll ACCO U ll ACCO UC ACCO..... UC ACCO UC ACCO.... UC Ainsworth ll Ainsworth Ainsworth ll4.5 II 27 Ainsworth Ainsworth Bear Bear Unicorn X Bear..... Unicorn X405E Bear Unicorn X Bear Unicorn X4E Bear Unicorn X Bear Unicorn X Bear Unicorn X Bear Unicorn X Corn King ' Forster X Forster X ll Forster... 4X Forster X II Forster McAllister..... SX McAllister..... SX McAllister... SX Moews M Moews Sup'r Maiz Moews..... Sup'r Maiz Moews Sup'r Maiz O's Gold Pioneer Pioneer Pioneer Pioneer A Pioneer Pioneer Pioneer Pioneer ') Pioneer X Pioneer X Sieben SX Average of entries L. S. D N. S. N.S. 8

26 24 CIRCULAR NO. 32 Table 6a. - West North-Central Illinois: Galesburg, Increased Planting Rate (Planted at 24,000 plants per acre in 28-inch rows) TOTAL ACRE GRAIN ERECT PLANTS ENTRY YIELD MOISTURE PLANTS PER ACRE SUMMARY BU. PERCT. PERCT. LEWIS X16 ~ DOCKENDORFF BLANEY B NORTHRUP-KING PX BLANEY DOUBLE A MC ALLISTER SX MC ALLISTER SX PIONEER SIEBEN 51-5X MOEWS 6391 ~ Me ALLISTER SX SUPER-CROST BEAR UNICORN X POCKL INGTON P ~C ALLISTER TX DOCKENDORFF MIGRO M P)ONEER 3376 (X PNEER BO-JAC X PIONEER BO-JAC X Z 300 8EAR UNICORN X MIGRO M44SX SUPER-CROST S WHISNAND POCKLINGTON P-742 ~ PIONEER MC ALLISTER MX ACCO UNI-CROSS PIONEER XI SUPER-CROST S-69 ~ NULL N-I MC ALLISTER SX MC ALLISTER SX AV. OF ALL ENTRIES L.S.O N.S.

27 PERFORMANCE OF CORN HYBRIDS Table 6a. - Galesburg, Increased Planting Rate, continued Brand Variety SUMMARY: 1970 Tota1 Acre Yie 1d Gra in Mois ture Lodged Per Acre Blight bu. perct. perct. perc t. ACCD... UC ACCO..... UC ACCO.... UC Ainsworth Ainsworth Ainsworth Ainsworth... 8Y) Bear....,.. Unicorn X40') Bear... Unico!'n X40')E.... ') Bear... Unicorn X Bear.. Unicorn X Bear.. Unicorn X Bear...,. Unicorn x61,) Bo-Jac. X2E Bo-Jac... X15E Bo -Jac... X Bo - J ac.. X Coop... S Coop... S Dockendorff Dockendorff Farmers Union Holden... Exp Holden... Exp Holden... Exp Lewis. Exp. X Lewis... X McAllister MX McAllister... SX McAllister... SX McAllister SX McAllister... SX McAllister. Sx McAllister. SX III McAllister... SX McAllister... TX Migro.... M-44SX Migro. M Migro... M-I0SX Moews. M Moews... Sup'r Maiz Moews... Sup'r Maiz Moews Sup'r Maiz Moews... Sup'r Maiz Northrup-King... PX Northrup-King... PX Northrup-King... PX Pioneer Pioneer Pioneer

28 26 CIRCULAR NO. 32 Table 6a. - Galesburg, Increased Planting Rate, continued Brand Variety SUMMARY: 1970 Total Acre Yield Grain Moisture Lodged Per Acre Blight bu. perct. perct. perct. Pioneer. 3369A Pioneer Pioneer Pionee.r Pioneer Pioneer Pioneer.... X Pocklington P Pock1ington P Prairie Stream Go1dencross SX1B. ll Renk RK Renk. RK Sieben.. 25-XS Sieben.. 29-X Sieben. 33-X Stewart S ll Stewart SX Super-Cros t Super-Crost.... S Super-Crost.. S Super-Crost... S Super-Cros t.... S Todd M Todd M5S Trojan.. TXS Trojan TXI Trojan TXSI Trojan. TXSI Trojan. TXS Whisnand Average of entries L. s. D