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| Web URL(s): | https://neppsc.org/wp-content/uploads/2020-NEPPSC-Proceedings-FINAL.pdf#page=125
Last checked: 06/22/2023
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Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2020-NEWSS-Proceedings-FINAL.pdf#page=115
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy-fourth Annual Meeting of the Northeastern Weed Science Society reprint |
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| Publication Type:
| Proceedings |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Peppers, J.;
Brewer, J.;
Craft, J.;
Askew, S. D. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Irrigation timing influences goosegrass control and bermudagrass response to topramezone programs |
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| Meeting Info.: | Philadelphia, Pennsylvania: January 6-9, 2020 |
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| Source: | Proceedings of the Fifth Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Vol. 5, 2020, p. 113. |
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| Publishing Information: | s.l.: Northeastern Weed Science Society; Northeastern Regional Branch of the American Society of Agronomy, Crop Science Society of America, & Soil Science Society of America; and American Society of Horticultural Science - Northeastern Division |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Lack of effective postemergence herbicide options makes goosegrass control more difficult in warm season turfgrass. The HPPD-inhibiting herbicide topramezone and the PSII-inhibiting herbicide metribuzin can both control goosegrass. However, injury concerns limit the use of these herbicides in warm season turfgrass. Previous research has shown that tank mixtures of topramezone and metribuzin reduces bermudagrass bleaching and allows for lower topramezone use rates to achieve effective goosegrass control. Further studies have recently shown that irrigating turf immediately after applying these herbicides may result in less turfgrass injury. Field trials were conducted during the summers of 2018 and 2019 in Blacksburg, Virginia, to examine the effect of irrigation timing on herbicidal activity of topramezone applied alone and in combination with metribuzin for goosegrass control and 'Latitude 36' bermudagrass injury. Treatments included topramezone (12.2 g ai ha-1) alone and topramezone (6.1 g ai ha-1) mixed with metribuzin (280.2 g ai ha-1). Both treatments were examined with no irrigation, immediate irrigation (0.25 cm), irrigation 15 minutes after herbicide application, and irrigation 30 minutes after herbicide application. Treatments that included topramezone plus metribuzin were significantly less injurious to bermudagrass than treatments of topramezone alone. For example, in 2018 at 7 days after treatment, immediate irrigation following topramezone alone injured bermudagrass 76% whereas similar irrigation following the combination of topramezone and metribuzin injured bermudagrass 5%. Turf response to herbicides and irrigation was dependent on year because irrigation at 15 and 30 minutes after treatment reduced phytotoxicity more in 2019 than in 2018. Irrigation, regardless of timing, reduced bermudagrass injury from topramezone plus metribuzin. At 28 days after application, topramezone and topramezone plus metribuzin controlled goosegrass at least 93% when irrigation was not applied following treatment. Immediate irrigation reduced goosegrass control to 57% and irrigation at 15 or 30 minutes reduced goosegrass control to approximately 81%. At 8 weeks after treatment, goosegrass plant counts exhibited a general trend toward increasing plant recovery as irrigation delay was reduced, but variable goosegrass population levels made statistical separation impossible. In 2018, the two herbicide programs did not differ for goosegrass recovery but topramezone plus metribuzin resulted in slightly more goosegrass recovery in 2019. Results from these trials indicate that more immediate irrigation lowered both bermudagrass injury and initial goosegrass control. Long-term goosegrass control may be governed by other factors." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
Reprint appears in Proceedings of the Seventy-fourth Annual Meeting of the Northeastern Weed Science Society 2020, Vol. 74, p. 86 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Peppers, J., J. Brewer, J. Craft, and S. D. Askew. 2020. Irrigation timing influences goosegrass control and bermudagrass response to topramezone programs. p. 113. In Proceedings of the Fifth Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Philadelphia, Pennsylvania: January 6-9, 2020. s.l.: Northeastern Weed Science Society; Northeastern Regional Branch of the American Society of Agronomy, Crop Science Society of America, & Soil Science Society of America; and American Society of Horticultural Science - Northeastern Division. |
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| Web URL(s):
https://neppsc.org/wp-content/uploads/2020-NEPPSC-Proceedings-FINAL.pdf#page=125
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2020-NEWSS-Proceedings-FINAL.pdf#page=115
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy-fourth Annual Meeting of the Northeastern Weed Science Society reprint |
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