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ARS Home » Southeast Area » Tifton, Georgia » Crop Protection and Management Research » Research » Publications at this Location » Publication #119873
Title: TEXAS PANICUM CONTROL IN STRIP-TILLAGE PEANUT PRODUCTION.

Author
item Johnson, Wiley - Carroll

Submitted to: Proceedings of Southern Weed Science Society
Publication Type: Abstract Only
Publication Acceptance Date: 11/8/2000
Publication Date: 1/22/2001
Citation: Johnson, W.C. 2001. Texas panicum control in strip-tillage peanut production [abstract]. Proceedings of Southern Weed Science Society. 54:199-200.

Interpretive Summary:

Technical Abstract: Strip-tillage peanut production presents unique challenges for managing Texas panicum. Preplant incorporated applications of dinitroaniline herbicides are not possible. Chloracetamide herbicides are commonly used for grass control in other conservation tillage systems, but do not adequately control Texas panicum. Postemergence graminicides effectively control Texas panicum, but are more costly than dinitroaniline herbicides. Studies were conducted in 1999 and 2000 in Georgia to develop cost- effective systems to manage Texas panicum in strip-tillage peanut production. Rye was seeded as a cover crop the preceding year and killed with glyphosate in early April. Seedbeds were prepared and peanut seeded 3 wk after cover crop kill. The experimental design was split-plot with four replications. Main plots were preemergence herbicides; ethalfluralin, pendimethalin, metolachlor, alachlor, dimethenamid, and a nontreated control. Sub-plots were postemergence graminicides; sethoxydim, clethodim and a nontreated control. Neither dinitroaniline nor chloracetamide herbicides alone effectively controlled Texas panicum in strip-till peanut production, even under optimum conditions. Both sethoxydim and clethodim consistently controlled Texas panicum, either alone or sequentially following preemergence herbicides. While postemergence graminicides effectively control Texas panicum in strip-till peanut production, their use to the exclusion of a dinitroaniline herbicide will leave some dicot weeds uncontrolled, particularly Florida pusley. Growers who use strip- till peanut production must use a properly timed postemergence graminicide in addition to dinitroaniline herbicides, and this additional input needs to be included in crop production budgets.