Full TGIF Record # 317062
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/133095
    Last checked: 03/28/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Pritchard, Benjamin; Carroll, Devon; Brosnan, James T.; Breeden, Gregory K.
Author Affiliation:Pritchard: University of Tennessee-Knoxville, Bluff City, TN; Carroll: University of Tennessee-Knoxville, Knoxville, TN; Brosnan and Breeden: Department of Plant Sciences, University of Tennessee-Knoxville, Knoxville, TN
Title:Imazapic evaluated for growth regulation on hybrid bermudagrass (C. dactylon (L.) Pers. x C. Transvaalensis Burtt-Davy)
Section:Turfgrass pest management oral I (includes student competition)
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C05 turfgrass science
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 133095.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Imazapic is an acetolactate synthase inhibiting herbicide labeled for postemergence weed control and growth regulation in pastures, rangeland, and non-crop areas. Field research was conducted in Knoxville, TN in summer 2020 and 2021 to evaluate the tolerance of four hybrid bermudagrass (C. dactylon x C. transvaalensis Burtt-Davy) cultivars to applications of imazapic for growth regulation. Separate experiments were conducted on 'TifTuf', 'Tifway', 'Tahoma 31', and 'Latitude 36' hybrid bermudagrass maintained as golf course fairways. Each experiment included plots (1.5 m2) arranged in a randomized complete block design with four replications. Treatments were applied on 14 August 2020 and 6 August 2021. Rates included imazapic at 35, 52.5, 70, or 105 g ha-1 mixed with methylated seed oil adjuvant at 0.5% v/v. Non-treated check plots (0 g ha-1 imazapic) were included in each replication for comparison. Tolerance of each cultivar was assessed via visual ratings of turfgrass injury on a 0 (i.e., no injury) to 100 (i.e., complete kill) percent scale relative to the non-treated check at 3, 10, 14, 21, and 28 days after treatment (DAT). Growth regulation was quantified on the same dates by harvesting and weighing oven dry clippings collected from an 0.84 m2 area in the center of each experimental plot. Clipping weights were used to calculate relative growth suppression compared to non-treated check plots. Each year imazapic injured hybrid bermudagrass 33 to 70% by 10 DAT with minimal injury detected by 28 DAT. Few statistically significant differences in growth suppression were detected among imazapic rates applied to each cultivar in either year; however, the degree of growth suppression varied over years on all cultivars and could be related to rainfall accumulation differences. Overall, findings suggest that imazapic (35 g ha-1) can regulate hybrid bermudagrass growth if pronounced, albeit transient, injury can be tolerated."
See Also:Original version appears in Proceedings of the Southern Weed Society 74th Annual Meeting Vol. 74, 2021, p. 159, R=319845. R=319845

See also related item "Growth suppression of hybrid bermudagrass with imazapic" HortScience, 59(2) February 2024, p. 258-261, R=334640. R=334640
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pritchard, B., D. Carroll, J. T. Brosnan, and G. K. Breeden. 2021. Imazapic evaluated for growth regulation on hybrid bermudagrass (C. dactylon (L.) Pers. x C. Transvaalensis Burtt-Davy). Agron. Abr. p. 133095.
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