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Web URL(s):http://www.swss.ws/wp-content/uploads/2021_SWSS_Proceedings_Final.pdf#page=258
    Last checked: 06/28/2022
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Publication Type:
Content Type:Abstract or Summary Only
Author(s):Pritchard, B. D.
Author Affiliation:University of Tennessee, Knoxville, TN
Title:Hybrid bermudagrass tolerance to application of imazapic for growth regulation
Section:2021 Meeting abstract
Other records with the "2021 Meeting abstract" Section
Meeting Info.:January 25-26, 2021
Source:Proceedings of the Southern Weed Science Society 74th Annual Meeting. Vol. 74, 2021, p. 159.
Publishing Information:Biloxi, MS: Southern Weed Science Society
# 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 to evaluate the tolerance of four hybrid bermudagrass (Cynodon dactylon x C. transvaalensis Burtt Davy) cultivars to applications of imazapic. 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 included imazapic at 35, 52.5, 70, and 105 g ha-1 mixed with methylated seed oil adjuvant at 0.5% v/v. A non-treated check was included 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 clippings collected from each experimental plot. Pronounced injury (33 to 60%) was observed 10 DAT with imazapic on Tifway, TifTuf, and Tahoma 31 with few differences detected among rates; a similar response was observed on Latitude 36, but did not manifest until 14 DAT. All cultivars recovered from imazapic-induced injury by 28 DAT except TifTuf (= 9% injury). No significant differences in growth regulation were detected among rates of imazapic applied to Tifway, TifTuf, and Latitude 36; these treatments reduced clipping yield to = 25% of the non-treated check by 14 DAT. Growth regulation persisted through 28 DAT on TifTuf and Latitude 36; however, clipping yields on Tifway exceeded the non-treated check by 28 DAT. Growth regulation of Tahoma 31 varied among imazapic rates. Experiments will be repeated in the summer of 2021; preliminary findings suggest imazapic can regulate hybrid bermudagrass growth if pronounced, albeit transient, injury can be tolerated."
See Also:Updated version appears in ASA, CSSA and SSSA International Annual Meetings 2021, p. 133095, R=317062. R=317062
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pritchard, B. D. 2021. Hybrid bermudagrass tolerance to application of imazapic for growth regulation. South. Weed Sci. Soc. Proc. 74:p. 159.
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    Last checked: 06/28/2022
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    Notes: Item is within a single large file
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MSU catalog number: b2207931
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