Control and Competition of Bermudagrass (Cynodon dactylon (L.) Pers.) Biotypes in Cotton

Charles T. Bryson


 
ABSTRACT

Bermudagrass is now estimated to be present in 60% of the cotton fields in the Mississippi Delta Region. Seventeen bermudagrass biotypes were collected from a four-state area from cotton fields and forestry nurseries and planted at Stoneville, Mississippi to compare growth habits, competition and control with and without cotton. When grown in cotton, individual biotypes differ in competitiveness. Biotypes were from 5 to 45% taller and lateral growth was reduced 27 to 92%. Comparative effectiveness of herbicides among biotypes for season-long control ranged from 89 to 96% using haloxyfop at 0.56 kg/ha to 4 to 89% using dalapon at 11.2 kg/ha. Herbicides ranked as to overall effectiveness in control of all biotypes were haloxyfop > DPX-Y6202 > fluazifop > glyphosate > sethoxydim > dalapon > fenoxaprop.



Reprinted from 1985 Proceedings: Beltwide Cotton Production Research Conferences pg. 200
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998