http://www.ag.ohio-state.edu/~corn/

CORN
Crop Observation and Recommendation Network

December 9, 2002-January 6, 2003
C.O.R.N. 2002-40

In This Issue:

A) Talk To You Again In 2003
B) 2002 Ohio Soybean Performance Data Available
C) Regional Agronomy Meetings Early Registration For Decmber Meetings End This Week
D) Dates And Locations For Agronomy Workshops
E) Impact Of Corn Borer On Ohio Corn Yields In 2002

A) Talk To You Again In 2003 CORN Questions

This is our last 2002 issue. We hope you have found the Crop Observation And Recommendation Network to be a valuable information piece for your business. Best wishes to you and your family during the Christmas Season and for a prosperous New Year. We will be back in 2003 with more timely information and updates on Agronomic issues for Ohio's crop industry.

B) 2002 Ohio Soybean Performance Data Available - Beuerlein CORN Questions

The 2002 Ohio Soybean Performance Trails are now available on-line at http://www.ag.ohio-state.edu/~perf/. Overall relative maturity had little effect on yield. There was little vegetative growth in Central Ohio and plants were very small regardless of maturity, but later-maturing varieties were larger than early varieties. The size difference accounts for the increased yield of later maturing varieties. Due to wet weather, the southern Ohio tests were planted in early June. Here again, there was a small yield increase associated with later maturity and the associated larger plant size.

Typically, there is little difference in grain yield due to relative maturity when the crop is planted in early May using narrow rows. Previous data indicate that varieties in the 3.0 to 3.5 relative maturity range yield about one bushel more than the early group II and early group IV varieties.

Later maturing varieties were slightly taller than earlier varieties. Relative maturity had little effect on seed size or the oil and protein content of grain. Since yield and other characteristics are not associated with relative maturity, a wide range of maturities should be used to lengthen the growing season so higher quality grain can be harvested with less harvest season stress for the producer.

Summary table can be found in the newsletter version posted on the web at http://corn.osu.edu/archive/2002/dec/02-40.html

C) Regional Agronomy Meetings Early Registration For Decmber Meetings End This Week - Labarge CORN Questions

The December Series of Regional Agronomy meetings are less than a month away. Early registration is $15 AND ENDS ONE WEEK PRIOR TO THE MEETING DATE. At door registration is $20 space permitting. The dates and location for December are:

December 16, 2002
Trumbull County - Warren at Trumbull Career and Technical Center, 330-675-2595

December 17, 2002
Wyandot County - Sycamore at Sycamore Community Center, 419-447-9722

December 18, 2002
Henry County - Deshler at Bavarian Haus, 419-354-9050

December 19, 2002
Darke County - Versailles at K of C Hall, 937-548-5215

A complete agenda listing and approved credits for CCA and Pesticide Applicator Training for each location can be found at http://corn.osu.edu/Education/index.html.

D) Dates And Locations For Agronomy Workshops CORN Questions

The day long Agronomy Workshop series for corn, soybean, wheat and soil fertility will be held in late January and February of 2003. The workshop provide hands on learning experiences and have been highly rated by past attendees. Cost is $15 to $30 depending on the workshop. Contact the agent listed with each meeting for details or brochures for each meeting can be found at http://corn.osu.edu/Education/2003work.html
CCA and PAT credits are offered where appropriate.

CORN PRODUCTION AND MANAGEMENT WORKSHOPS

Tuesday, January 28th, 2003
Stark County, Canton
Canton Garden Center
Dennis Weilnau
330-497-1611

Wednesday, January 29th, 2003
Knox County, Mt. Vernon
OSU Extension Office
1025 Harcourt Road
John Barker
740-397-0401

Thursday, January 30th, 2003
Ross County, Chillicothe
Ross County Service Center
475 Western Avenue
Ray Wells
740-702-3200

Friday, January 31st, 2003
Wood County, Custar
OARDC Northwest Branch
4240 Range Line Road
Alan Sundermeier
419-354-9050

SOYBEAN PRODUCTION AND MANAGEMENT WORKSHOPS

Wednesday, February 5th, 2003
Ashtabula County, Williamsfield
Williamsfield Community Center
Corner of Route 322 and Route 7
David Marrison
440-576-9008

Thursday, February 6th, 2003
Marion County, Marion
Prospect Room
222 W. Center Street
William Hudson
740-223-4040

Tuesday, February 11th, 2003
Clark County, Springfield
OSU Extension Office
4400 Gateway Blvd.
Mike Haubner
937-328-4607

Wednesday, February 12th, 2003
Brown County, Fincastle
Southern State Community College
U.S. Route 62
David Dugan
937-378-6716

PROFITABLE WHEAT MANAGEMENT WORKSHOPS

Wednesday, February 19th, 2003
Paulding County, Paulding
Youth Leadership Building
Paulding County Fairgrounds
Jim Lopshire
419-399-8225

Thursday, February 20th, 2003
Sandusky County, Fremont
Sandusky County Fairgrounds
901 Rawson Avenue
Mark Koenig
419-334-6340

Friday, February 21st, 2003
Madison County, London
Madison County Engineers Building
831 U.S. Rt. 42 NE
Eric Imerman
740-852-0975

SOIL FERTILITY WORKSHOPS

Tuesday, February 25th, 2003
Fayette County, Washington C.H.
OSU Extension Office
1415 U.S. Rt. 22 SW
Jim O'Brien
740-335-1150

Wednesday, February 26th, 2003
Logan County, Zanesfield
Goshen Friends Church
5527 Rd. 153
Tammy Dobbels
937-599-4227

Thursday, February 27th, 2003
Van Wert County, Van Wert
OSU Extension Office
1055 S. Washington Street
Andy Kleinschmidt
419-238-1214

E) Impact Of Corn Borer On Ohio Corn Yields In 2002 - Eisley CORN Questions

The 2002 growing season represented the sixth year of replicated trials comparing Bt- corn hybrids specifically, four YieldGard Corn Borer hybrids) to equivalent isolines (without the Bt trait) at the OARDC Western and Northwestern Branch stations. Corn borer injury on the non-Bt isolines at the Western Branch station in 2002 remained low at 0.3 cavities when corn was planted in late April. Corn borer injury was also low at the Northwestern Branch Station in 2002 averaging 0.3 cavities per plant. Because corn borer injury has historically been low at the Western Branch when corn was planted on a timely basis, a second later planting (May 20) was made at the Western Branch in 2002. Corn borer pressure was slightly higher in this planting, averaging 0.45 cavities per plant.

Average yields from the first planting at the Western Branch station were 111.4 for the YieldGard Corn Borer hybrids and 112.3 for the non-Bt isolines. Average yields from the second planting at the Western Branch station were 109.5 for the YieldGard Corn Borer hybrids and 102.5 for the non-Bt isolines. There were no significant differences in yield between any of the hybrids and their isolines in both the first and second plantings at the Western Branch station. Average yields at the Northwestern Branch station were 64.6 for the YieldGard Corn Borer hybrids and 59.6 for the non-Bt isolines.

In addition to the trials at the branch stations, field trials with the same hybrids were conducted at eight county on-farm sites with the cooperation of OSU Extension agents and growers. Participants included Crawford, Darke, Fairfield, Fayette, Hancock, Highland, Licking and Van Wert OSU Extension county programs. The county trials were not replicated except for Van Wert (replicated 3 times). Corn borer infestations of non-Bt isolines in the on-farm trials ranged from 0.35 to 1.70 cavities per plant.

In the on-farm trials, the difference in yield between the YieldGard Corn Borer hybrids and their non-Bt isolines averaged 1.4 bushels per acre. Average yields of the YieldGard Corn Borer hybrids were higher at 5 of the eight locations this year and the difference in yield was 4.8 bushels/acre. Where the non-Bt isolines out yielded the YieldGard Corn Borer hybrids, the yield difference was 4.8 bushels per acre on average.

The average yield difference from all of the trials conducted 2002 was 2.1 bushels per acre in favor of the YieldGard Corn Borer hybrids. Trials planted after May 15 had an average yield difference of 2.9 bushels/acre in favor of the YieldGard Corn Borer hybrids.

The complete report for 2002 can be found on the web at: http://entomology.osu.edu/ag/reports.htm.

Readers can subscribe electronically to this newsletter by sending an e-mail message to: corn-out-on@postoffice.ag.ohio-state.edu. A successful subscription message will receive by an automatic reply from the listserv. Contact your local Ohio State University Extension Office or e-mail labarge.1@osu.edu if you have problems subscribing.

Past versions of C.O.R.N. can be found on the World Wide Web at: http:/www.ag.ohio-state.edu/~corn/archive/

C.O.R.N. is a summary of crop observations, related information, and appropriate recommendations for Ohio Crop Producers and Industry. C.O.R.N. is produced by the Ohio State University Extension Agronomy Team, State Specialists at The Ohio State University and Ohio Agricultural Research and Development Center. C.O.R.N. Questions are directed to State Specialists, Extension Associates, and Agents associated with Ohio State University Extension and the Ohio Agricultural Research and Development Center at The Ohio State University.

State Specialists: Anne Dorrance, & Dennis Mills (Plant Pathology), Jeff Stachler (Weed Science), and Bruce Eisley (IPM) Extension Agents: Roger Bender (Shelby), Howard Siegrist (Licking), Clark Hutson (Seneca) and Greg La Barge (Fulton).

Editor: Greg LaBarge Web Editor: Tom Rosati

Information presented above and where trade names are used, they are supplied with the understanding that no discrimination is intended and no endorsement by Ohio State University Extension is implied. Although every attempt is made to produce information that is complete, timely, and accurate, the pesticide user bears responsibility of consulting the pesticide label and adhering to those directions.

All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status.

Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Keith L. Smith, Director, Ohio State University Extension.