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Control of Rhizome Johnsongrass (Sorghum Halepense) in Sugarcane with Trifloxysulfuron and Asulam
- Source :
- Weed Technology. 22:397-401
- Publication Year :
- 2008
- Publisher :
- Cambridge University Press (CUP), 2008.
-
Abstract
- It has been suggested that trifloxysulfuron might increase the efficacy of asulam for control of johnsongrass. Container and field studies were conducted to determine the efficacy of POST applications of trifloxysulfuron and asulam for johnsongrass control in sugarcane. Asulam was applied at 460 and 920 g ai/ha to container-grown johnsongrass plants, with and without 8 g ai/ha of trifloxysulfuron. Combinations of asulam and trifloxysulfuron generally reduced johnsongrass height, rhizome length, and biomass more than when either was applied alone. Results suggested that combinations of asulam and trifloxysulfuron were synergistic in their control of johnsongrass biomass 8 wk after treatment. In a sugarcane field heavily infested with rhizome johnsongrass, asulam was applied at 1,800, 2,800, and 3,700 g/ha with and without trifloxysulfuron at 16 g/ha. Asulam plus trifloxysulfuron generally controlled johnsongrass more effectively than either herbicide alone. The control of johnsongrass with asulam at 1,800 g/ha resulted in an increase in sugar yield of more than twice that in the nontreated control. Sugar yield increased further when asulam was applied at 2,800 g/ha or combined with trifloxysulfuron, but application of trifloxysulfuron alone did not increase yield. Combinations of asulam and trifloxysulfuron might slow the spread of rhizome johnsongrass enough to allow an increased number of ratoon crops before sugarcane fields need to be replanted.
- Subjects :
- 0106 biological sciences
biology
04 agricultural and veterinary sciences
Plant Science
Sorghum
biology.organism_classification
01 natural sciences
Rhizome
010602 entomology
chemistry.chemical_compound
Agronomy
chemistry
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Asulam
Agronomy and Crop Science
After treatment
Subjects
Details
- ISSN :
- 15502740 and 0890037X
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Weed Technology
- Accession number :
- edsair.doi...........ed760de96c21707a8ed5fa899424e2c8