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| Full TGIF Record # 325156 Item 1 of 1 |
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| Web URL(s): | http://www.swss.ws/wp-content/uploads/2022_SWSS_Proceedings_Final-04-002.pdf#page=71 Last checked: 02/07/2023 Requires: PDF Reader Notes: Item is within a single large file; Abstract only |
| Publication Type: | Report |
| Author(s): | Ignes, M. J. |
| Author Affiliation: | Mississippi State University, Starkville, MS |
| Title: | Effects of spray droplet size on pronaminde control of Poa annua |
| Meeting Info.: | January 23-27, 2022 |
| Source: | Proceedings of the Southern Weed Science Society 75th Annual Meeting. Vol. 75, 2022, p. 5. |
| Publishing Information: | Biloxi, MS: Southern Weed Science Society |
| # of Pages: | 1 |
| Abstract/Contents: | "Annual bluegrass (Poa annua L.) is a problematic weed in turfgrass that has evolved resistance to ten different herbicide sites of action, more than any other turfgrass weed. The mitotic inhibiting herbicide pronamide has both pre- and post-emergence activity on susceptible annual bluegrass populations, but on certain resistant populations, postemergence activity is hypothetically compromised due to lack of root uptake or due to an unknown foliar resistance mechanism. Spray droplet size may affect foliar and soil deposition of pronamide, thus potentially explaining variation in population control or differential shoot and root uptake. Greenhouse experiments were conducted to quantify pronamide, flazasulfuron, and pronamide + flazasulfuron (a common tank mixture) deposition on annual bluegrass as affected by spray-droplet size. Five droplet sizes (200, 400, 600, 800, and 1000 µm) were sprayed in an enclosed spray chamber on two-to-three leaf stage annual bluegrass plants. Fluorescent tracer dye was added to each treatment solution to quantify the effects of herbicide and spray droplet size on herbicide deposition. Results from this study indicate that spray droplet size affects deposition of pronamide and flazasulfuron, applied alone and in combination, on annual bluegrass. The highest foliar deposition was produced with the 400 µm spray droplet size in pronamide treatments and with the 200 µm spray droplet size in flazasulfuron and pronamide + flazasulfuron treatments. Regression models of pronamide and pronamide + flazasulfuron treatments were similar and, therefore, the addition of flazasulfuron to pronamide in the tank mixture (pronamide + flazasulfuron treatments) did not affect herbicide deposition when compared to pronamide-alone treatments. Results suggest that the 200 to 400 µm spray droplet size is optimal for foliar deposition of pronamide. Alternatively, larger droplet sizes may facilitate better soil deposition of pronamide where root uptake is optimal. Future research will evaluate pronamide efficacy as affected by spray droplet size." |
| Language: | English |
| References: | 0 |
| See Also: | Related article appears in International Turfgrass Society Research Journal, 14(1), June 2022, p. 1080-1083 R=321556.R=321556 |
| Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-like – may be incomplete): | Ignes, M. J. 2022. Effects of spray droplet size on pronaminde control of Poa annua. South. Weed Sci. Soc. Proc. 75:p. 5. |
| Fastlink to access this record outside TGIF: | http://tic.msu.edu/tgif/flink/RECNO/325156 |
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| Web URL(s) : | http://www.swss.ws/wp-content/uploads/2022_SWSS_Proceedings_Final-04-002.pdf#page=71 Last checked: 02/07/2023 Requires: PDF Reader Notes: Item is within a single large file; Abstract only |
| MSU catalog number: | b2207931 |
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