Full TGIF Record # 302071
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Web URL(s):https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/111349
    Last checked: 11/12/2018
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Publication Type:
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Report
Content Type:Abstract or Summary only
Author(s):Small, Zachary; McCurdy, James D.; Brosnan, James T.; Byrd, John; Tseng, Te Ming; Reasor, Eric H.; Richard, Michael
Author Affiliation:Small: Plant and Soil Sciences, Mississippi State University, Starkville, MS; McCurdy: Mississippi State University, Mississippi State, MS; Brosnan: Department of Plant Sciences, University of Tennessee - Knoxville, Knoxville, TN; Byrd: Plant and Soil Sciences, Mississippi State University, Mississippi State, MS; Tseng and Richard: Mississippi State University, Mississippi State, MS; Reasor: Department of Plant Sciences, Mississippi State University, Mississippi State, MS
Title:Rate response study of path rush (Juncus tenuis) and toad rush (Juncus bufonius) to 2,4-D and halosulfuron
Section:C05 turfgrass science
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Plant protection in turfgrass ecosystems poster (Includes student competition)
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Meeting Info.:Baltimore, Maryland: November 4-7, 2018
Source:ASA, CSSA and SSSA International Annual Meetings. 2018, p. 111349.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy]
# of Pages:1
Keywords:TIC Keywords: 2,4-D; Halosulfuron; Herbicide efficacy; Herbicide evaluation; Juncus bufonius; Juncus tenuis; Weed control
Abstract/Contents:"Path rush (Juncus tenuis) and toad rush (J. bufonius) are common weeds in maintained turf. Traditionally, turfgrass managers have used auxin mimicking herbicides, such as 2,4-D or 2,4-D combination products, to control rush species. However, anecdotal evidence suggests ALS inhibiting herbicides may control these weeds. An ongoing rate response study at Mississippi State University is being conducted in order to determine effective herbicides and treatment rates. Toad rush and two path rush biotypes from two locations were harvested. Treatments included halosulfuron, 2,4-D, and a combination halosulfuron and 2,4-D, with 2,4-D held constant at 1x rate. Rate response was evaluated for ¼, ½, 1, 2, 4, 8, 16, and 32 times manufacturer labelled rates. Herbicides were applied using a CO2 pressurized backpack sprayer with a water carrier volume of 187 L ha-1 and included a non-ionic surfactant at a rate of 1% v v-1. Visual injury ratings on a 0 (no injury) to 100% (complete plant death) scale were taken at 2, 4, and 6 weeks after treatment (WAT). Dry shoot and root weights were taken after harvest 6 WAT. Linear regression models of visual injury data, created in GraphPad Prism 7, were used to determine LD50 values for each species in response to each treatment. For all herbicides tested, toad rush exhibited greater visual injury at much lower rates than path rush. Six weeks after treatment, the 1x rate of the halosulfuron treatment injured toad rush 76% compared to 37 and 33% for both biotypes of path rush. When applied at the 1/4x rate, 2,4-D injured toad rush 82%, while both path rush biotypes were injured less than 40%. When 2,4-D and halosulfuron are combined into one treatment, no enhancement or antagonism is observed in the control of either rush species. Future research should examine other sulfonylureas for rush control."
Language:English
References:0
Note:This item is an abstract only!
"116"
"Poster Number: 1251"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Small, Z., J. D. McCurdy, J. T. Brosnan, J. Byrd, T. M. Tseng, E. H. Reasor, et al. 2018. Rate response study of path rush (Juncus tenuis) and toad rush (Juncus bufonius) to 2,4-D and halosulfuron. Agron. Abr. p. 111349.
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    Last checked: 11/12/2018
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