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Texas Cooperative Extension Service The Texas A&M University System 30th Anniversary |
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News about Integrated Pest Management in Hale-Swisher Counties. Greg Cronholm, Extension Agent - IPM, 122 East 6th, P.O. Box 680, Plainview, TX., 79073-0680, 806-291-5273 |
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Web Site: http://entowww.tamu.edu |
E-Mail:
g-cronholm@tamu.edu
September 19, 2002 |
COTTON DEFOLIATION Defoliation or dessication are important questions every year especially when cotton is early and a high percent of bolls are open in September. Defoliants can often be safely applied when 50 to 60 percent of bolls are open and the remaining bolls are of sufficient maturity. After use of a defoliant, unopened bolls can be a problem. This is the reason some growers like to add a boll opening material to their defoliant, such as one of the ethephon products. Often a paraquat-based material may have to be applied following defoliation to completely prepare the cotton for stripping. Desiccants (paraquat formulations) are normally applied when 80% of the productive bolls are open or when an average 2 to 3 nodes above cracked boll is reached. I like to determine boll maturity by slicing bolls with a very sharp knife. I now use a small block of wood on which to cut bolls. A cross section of a mature boll is difficult to slice because of the drag created by the mature fiber. The seed coat in mature green bolls will be tan to light brown in color. The cotyledon will be well formed inside the seed. If the seed still has gelatinous material around the forming cotyledons the boll is not yet mature. This will help to determine what % of immature harvestable bolls remain and if it is close to time to apply a defoliant or desiccant. Enclosed is a table prepared by Dr. Randy Boman, Extension Cotton Agronomist and others. It has three tables: 400 lb/a yield potential cotton, 500 + lb/a yield potential cotton and 800 + lb/a cotton. A detailed guide to cotton defoliation can be found at our Lubbock website at the following address: http://lubbock.tamu.edu. WHEAT Fall armyworm infestations have been reported in the Olton and Edmonson areas. In some cases foliage feeding has been extensive and damage such that replanting may be required. Fall armyworm control in wheat can be achieved with Sevin, ethyl parathion, Lannate, Lorsban, methyl parathion and Warrior T. Early detection is important, since small larvae are much easier to control. SORGHUM HYBRID FIELD DAY AGENDA ATTACHED |
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Texas
A&M Sorghum Hybrid Field Day Texas A&M and Sorghum PROFIT is sponsoring a grain sorghum hybrid field day at 8:30 AM, Thursday, September 26th, at the Halfway Station, 14 miles west of Plainview on U.S. Hwy. 70. Seed industry personnel and producers can view commercial white food grade sorghums, releases and breeding work from the Texas A&M—Lubbock breeding program, and receive an update on grain sorghum production practices. Also, National Grain Sorghum Producers staff will provide an update on the organization's recent activities. Sorghum seed industry personnel will have additional opportunity to visit with sorghum breeders about efforts within the Texas A&M breeding program. Texas A&M staff assisting with the meeting include sorghum breeders Darrell Rosenow and Gary Peterson as well as extension agronomist Calvin Trostle, all of Lubbock. 1.0 CEU is available. For further information call Texas A&M—Lubbock, (806) 746-6101, or the Experiment Station at Halfway (806) 889-3315. 8:30 AM Registration 8:45 Commercial food grade sorghum hybrid trial – Calvin Trostle 9:05 Update on Texas A&M sorghum breeding program and PROFIT – including new releases, germplasm evaluation, and other items of interest – Darrell Rosenow and Gary Peterson 9:45 Update from National Grain Sorghum Producers – Jeff Dahlberg 10:00 Refreshment break 10:15 Sorghum production management – Calvin Trostle 10:35 CEUs distributed,
producers free to leave 11:30 Wrap-up of official program |
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programs conducted by the Texas Agricultural Extension Service serve people
of all ages regardless of socioeconomic level, race, color, sex, religion,
handicap or national origin. The information given herein is for educational
purposes only. References to comercial products or trade names is made
with the understanding that no discrimination is intedned and no endorsement
by the cooperative Extension is implied. The
Texas A&M University System, U.S. Department of Agriculture, and the
County Commissioners Courts of Texas
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2002
HIGH PLAINS COTTON HARVEST-AID DECISION TABLE
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2002 HIGH PLAINS COTTON HARVEST-AID DECISION TABLE NOT ALL TREATMENTS ARE EQUALLY EFFECTIVE RATES LISTED ARE UNITS OF PRODUCT PER ACRE
* - FB = Followed by 1 - Use on cotton with natural leaf shed. High rates can cause green, healthy leaves to stick. Always use a non-ionic surfactant when applying paraquat-based materials (Cyclone Max and Boa).2 - No more than 32 oz total of Cyclone Max may be applied (in up to 3 multiple applications) in one season based on the Texas Special Local Need 24(C) label. No more than 38.4 oz total of Boa may be applied (in up to 3 multiple applications) in one season based on the amended federal label. The need for and rate of Cyclone Max or Boa in a second application will depend upon green leaves remaining. Use higher rates if regrowth is excessive. 3 - Tankmix partners with Cyclone Max include Accelerate, sodium chlorate, Folex/Def, and Leafall. 4 - Tankmix partners for Boa include Accelerate, Folex/Def, Harvade, SuperBoll, and CottonQuik. 5 - Ethephon-based material (such as Finish 6, CottonQuik, Prep, SuperBoll, Boll'd, Ethephon 6) activity is determined by rate and temperature. At lower temperatures, boll opening response can be enhanced by increasing rate. 6 - Always use crop oil concentrate with this combination and follow with paraquat-based desiccant 7-10 days later. |
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