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| Web URL(s): | https://www.wsweedscience.org/wp-content/uploads/WSWS-Proceedings-2020.pdf#page=134
Last checked: 04/17/2024
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary Only |
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| Author(s): | Stephens, Cameron;
Freund, Daniel;
Kerns, James;
Gannon, Travis |
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| Author Affiliation: | North Carolina State University, Raleigh, NC |
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| Title: | Herbicide phytotoxicity influenced by shade timing and density |
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| Section: | Poster session
Other records with the "Poster session" Section
WSSA Section 3: Turf and ornamentals
Other records with the "WSSA Section 3: Turf and ornamentals" Section
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| Meeting Info.: | Maui, Hawaii: March 2-5, 2020 |
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| Source: | Western Society of Weed Science Annual Meeting 2020. Vol. 73, March 2020, p. 101. |
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| Publishing Information: | Westminster, Colorado: Western Society of Weed Science |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Herbicide efficacy and phytotoxicity can be influenced by many environmental, biological, and edaphic factors. While there are numerous light-dependent herbicides across different modes of action, there are limited field studies evaluating the role of shade in herbicide phytotoxicity. Therefore, the objective of this research was to determine the influence of shade timing and shade density on turfgrass phytotoxicity following herbicide application. Shade structures (1.8m L × 1.8m W × 0.3m H) coupled with black shade cloth at 30, 60, and 90% shade density were constructed using a polyvinyl chloride frame. Field plots were exposed to each shade density at three shade timings including 2 days before herbicide application (2DB), 2 days after herbicide application (2DA), and two days before and after herbicide application (5DT). Single applications (rate) of sulfentrazone (0.9 L/ha), mesotrione (0.4 L/ha), and atrazine (4.8L/ha) were combined with an adjuvant (Induce; .25% by volume) and applied in 204 L/ha of water to 'Tifway 419' bermudagrass maintained at 1.3 cm and centipedegrass maintained at 5 cm. Phytotoxicity assessed visually and represented as percent values were collected 7, 14, and 21 DAT. Phytotoxicity on bermudagrass peaked at 7, 14, and 14 days after treatment (DAT) with atrazine (99%), mesotrione (86%) and sulfentrazone (86%), respectively. At 14 DAT, the main effect of shade timing significantly influenced phytotoxicity. Shade applied 2DB and 5DT resulted in the greatest phytotoxicity compared to the non-shaded sprayed controls. For centipedegrass, phytotoxicity peaked at 7 DAT with sulfentrazone (84%) and mesotrione (3%), and 14 DAT with atrazine (40%). Shade timing significantly influenced sulfentrazone phytotoxicity on centipedegrass on 7 and 14 DAT. Contrast to phytotoxicity on bermudagrass, 2DP shade timing resulted in the highest phytotoxicity whereas 5DT shade timing resulted in the lowest phytotoxicity with sulfentrazone. Turfgrass fully recovered by 21 DAT regardless of herbicide treatment on both bermudagrass and centipedegrass. Shade timing, and to a lesser extent shade density, may be an important parameter when applying herbicides to sensitive host crops." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Stephens, C., D. Freund, J. Kerns, and T. Gannon. 2020. Herbicide phytotoxicity influenced by shade timing and density. Proc. West. Soc. Weed Sci. 73:p. 101. |
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| Web URL(s):
https://www.wsweedscience.org/wp-content/uploads/WSWS-Proceedings-2020.pdf#page=134
Last checked: 04/17/2024
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2224583 |
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