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Sugarcane Response to Bermudagrass Interference

Published online by Cambridge University Press:  20 January 2017

Edward P. Richard Jr.  and
Caleb D. Dalley
Edward P. Richard Jr.*
Affiliation:
USDA–ARS, Southern Regional Research Center, Sugarcane Research Unit, 5883 USDA Rd., Houma, LA 70360
Caleb D. Dalley
Affiliation:
USDA–ARS, Southern Regional Research Center, Sugarcane Research Unit, 5883 USDA Rd., Houma, LA 70360
*
Corresponding author's E-mail: [email protected]
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Abstract

The competitiveness of three phenotypically different sugarcane cultivars with bermudagrass was determined in field trials. In trial one, bermudagrass biomass was 22% less in CP 70-321 than in HoCP 85-845 in the plant-cane crop, but biomass was 130 to 170% greater in CP 70-321 than in the other two cultivars during the second-ratoon crop. CP 70-321 emerges quickly following planting, which might have reduced bermudagrass growth in the plant-cane crop, but the lower stalk population of CP 70-321 might have promoted bermudagrass survival and growth during the second-ratoon crop. In trial two, there were no differences in bermudagrass biomass when comparing its establishment in the different cultivars. Sugarcane, averaged across cultivar, produced fewer stalks and was shorter when competing with bermudagrass. In the plant-cane crop, stalk populations were reduced 13 to 23%. In the first-ratoon crop, stalk population was reduced 8 to 15%. In the second-ratoon crop, stalk population was reduced 8 to 10%. Bermudagrass interference reduced sugar yields by 8 to 32% in the plant-cane crop, with reductions of no more than 9% in the first- and second-ratoon crops. The greater yield loss in the plant-cane crop in the first production year shows the importance of controlling bermudagrass in the summer fallow period prior to planting and during establishment of the plant-cane crop.

Keywords

Bermudagrass, Cynodon dactylon L. Pers. CYNDAsugarcane, Saccharum interspecific hybrids ‘CP 70-321’, ‘LCP 85-384’, ‘HoCP 85-845’Weed competitionweed interference
Type
Research
Information
Weed Technology , Volume 21 , Issue 4 , December 2007 , pp. 941 - 946
Copyright
Copyright © Weed Science Society of America 

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