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| Web URL(s): | https://www.swss.ws/wp-content/uploads/2023_SWSS_Proceedings_Final-002.pdf#page=134 Last checked: 01/04/2023 Requires: PDF Reader Notes: Item is within a single large file |
| Publication Type: | Report |
| Content Type: | Abstract or summary only |
| Author(s): | Young, A. A.; Begitschke, E.; Wang, C.; Tucker, K. A.; Henry, G. M.; Wilber, A. L.; McCurdy, J. D. |
| Author Affiliation: | Young, Begitschke, Wang, Tucker, and Henry: University of Georgia, Athens, GA; Wilber and McCurdy: Mississippi State University, Starkville, MS |
| Title: | Common carpetgrass tolerance to postemergence herbicides |
| Section: | 2023 meeting abstract Other records with the "2023 meeting abstract" Section |
| Meeting Info.: | January 23-26, 2023 |
| Source: | Proceedings of the Southern Weed Science Society 76th Annual Meeting. Vol. 76, 2023, p. 54. |
| Publishing Information: | Baton Rouge, LA: Southern Weed Science Society |
| # of Pages: | 1 |
| Abstract/Contents: | "Common carpetgrass [Axonopus fissifolius (Raddi) Kuhlm.] is a stoloniferous warm-season turfgrass that tolerates high soil moisture and low soil fertility. Adaptation to reduced light environments has created an interest in carpetgrass as groundcover in solar panel farms and similar low-input environments. However, weeds infesting these areas may provide additional challenges due to canopy height or inflorescence production; therefore, data evaluating carpetgrass tolerance to postemergence herbicides is warranted. Field research was conducted on a common carpetgrass rough at the Pine Hills Golf Course in Winder, GA during the summer of 2022. Herbicides were applied with a CO2 backpack sprayer calibrated to deliver 375 L ha-1 at 241 kPa. Treatments were initiated on 24 June 2022 and consisted of MSMA at 2.3 kg ai ha-1 , dicamba + iodosulfuron + thiencarbazone at 0.18 kg ai ha-1 , metsulfuron at 21 g ai ha-1 , carfentrazone + 2,4-D + MCPP + dicamba at 0.34 kg ai ha-1 , halauxifen-methyl + fluroxypyr + dicamba at 0.23 kg ai ha-1, penoxsulam + sulfentrazone + dicamba + 2,4-D at 0.34 kg ai ha-1, mesotrione at 0.18 kg ai ha-1, carfentrazone at 25 g ai ha-1, and MCPA + fluroxypyr + dicamba at 1.4 kg ai ha-1. A non-treated check was included. Carpetgrass phytotoxicity was 11 and 73% in response to dicamba + iodosulfuron + thiencarbazone and MSMA, respectively, 2 weeks after treatment (WAT), with corresponding NDVI of 0.68 and 0.37. Phytotoxicity increased to 46% 4 WAT in response to dicamba + iodosulfuron + thiencarbazone and decreased to 56% in response to MSMA. At 8 WAT, phytotoxicity was 19% in response to MSMA with NDVI of 0.72. No other treatment resulted in phytotoxicity or NDVI significantly different than the non-treated throughout the experiment. Greenhouse research was conducted at the Athens Turfgrass Research and Education Center in Athens, GA during the winter of 2022. Carpetgrass plugs were removed from a local population with a golf course cup cutter and transplanted into 1 L pots containing a 2:1 mixture of a Cecil clay loam soil and a Wakulla sand. Pots were allowed to mature in the greenhouse for a month before plants were cut to a height of 5.1 cm. The same treatments were applied to pots that were evaluated in the field. Percent phytotoxicity was rated visually 4 WAT. Pots were cut to 5.1 cm at 4 WAT and fresh biomass was weighed (g). Percent growth reduction (GR) was calculated by comparing biomass in response to each treatment to the non-treated check within the same trial replication. MSMA resulted in % phytotoxicity of 84% while all other treatments exhibited = %33 phytotoxicity. MSMA and dicamba + iodosulfuron + thiencarbazone resulted in % GR of 85 to 89%, while metsulfuron and fluroxypyr + dicamba resulted in 48% and 65% GR, respectively. Less than 30% GR was observed in response to all other treatments 4 WAT. This research identified several postemergence herbicides that can be safely applied to carpetgrass for broadleaf and grass weed control." |
| Language: | English |
| References: | 0 |
| See Also: | Original version appears in ASA, CSSA, SSSA International Annual Meeting, 2022, p. 143681, R=325016.R=325016 |
| Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-like – may be incomplete): | Young, A. A., E. Begitschke, C. Wang, K. A. Tucker, G. M. Henry, A. L. Wilber, et al. 2023. Common carpetgrass tolerance to postemergence herbicides. South. Weed Sci. Soc. Proc. 76:p. 54. |
| Fastlink to access this record outside TGIF: | http://tic.msu.edu/tgif/flink/RECNO/333842 |
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| Web URL(s) : | https://www.swss.ws/wp-content/uploads/2023_SWSS_Proceedings_Final-002.pdf#page=134 Last checked: 01/04/2023 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: | b2207931 |
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