Full TGIF Record # 34316
Item 1 of 1
Publication Type:
i
Refereed
Author(s):Johnson, B. Jack
Author Affiliation:Department of Crop & Soil Sciences, University of Georgia, Georgia Station, Griffin, GA 30223-1797
Title:Frequency of Drive (quinclorac) treatments on common bermudagrass tolerance and on large crabgrass control
Source:Journal of Environmental Horticulture. Vol. 13, No. 2, June 1995, p. 104-108.
Publishing Information:Washington, DC: Horticultural Research Institute
# of Pages:5
Keywords:TIC Keywords: Cynodon dactylon; Digitaria sanguinalis; Quinclorac; Herbicide resistance; Phytotoxicity; Weed control; Herbicide evaluation; Postemergence herbicides; Application rates; Application frequency
Abstract/Contents:"When a postemergence (POST) herbicide is used to control large crabgrass [Digitaria sanguinalis (L.) Scop.] in common bermudagrass [Cynodon dactylon (L.) Pers.], the herbicide should maintain optimum weed control for 8 to 10 weeks without causing undesirable injury to the turfgrass. A field experiment was conducted during 1993 and 1994 to determine the lowest rate of Drive (quinclorac) needed to control large crabgrass without causing undesirable injury to bermudagrass turf. Drive (quinclorac) applied at 0.28 kg ai/ha (0.25 lb ai/A) initially in early May and repeated at the same rate at a 2-week interval, controlled 85% large crabgrass for 16 weeks in 1993 ad 70% for 10 weeks in 1994. The control in 1994 was 96% for 17 weeks when the herbicide was applied at 0.28 kg ai/ha (0.25 lb ai/A) in each of three applications on May 2, May 29, and June 13. The maximum bermudagrass injury in 1993 from Drive (quinclorac) applied at 0.28 kg ai/ha (0.25 lb ai/A) in each of two applications at 2- to 4-week interval was <=27% compared to >= 33% when >= 0.56 kg ai/ha (>= 0.5 lb ai/A) was applied as a single application. Bermudagrass treated initially with Drive (quinclorac) at 0.28 kg ai/ha (0.25 lb ai/A) was injured higher in 1994 (<= 35%) than in 1993 (<=14%). Bermudagrass injury was >= 40% when the second application was delayed until mid- to late June either year or when the herbicide was applied in three applications during May and June 1994."
Language:English
References:9
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson, B. J. 1995. Frequency of Drive (quinclorac) treatments on common bermudagrass tolerance and on large crabgrass control. J. Environ. Hortic. 13(2):p. 104-108.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=34316
If there are problems with this record, send us feedback about record 34316.
Choices for finding the above item:
Find Item @ MSU
MSU catalog number: SB 118.48 .J68
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)