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| Web URL(s): | https://wssa.net/wp-content/uploads/WSSA-Virtual-Annual-Meeting-all-abstracts-updated-4-12-2021ab_FINAL.pdf#page=113
Last checked: 11/01/2022
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): | Russell, Eli C. |
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| Author Affiliation: | Auburn University, Auburn, AL |
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| Title: | Poa annua (annual bluegrass) species response to preemergence herbicides with differing target-site mutations |
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| Section: | 3MT PhD contest
Other records with the "3MT PhD contest" Section
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| Meeting Info.: | February 15-19, 2021 |
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| Source: | Abstracts of the Annual Meeting of the Weed Science Society of America. 2021, p. 113. |
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| Publishing Information: | [United States]: Weed Science Society of America |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Poa annua is a problematic weed that infests golf courses, sports fields, and home lawns. Mitotic inhibiting herbicides are often used to control Poa annua in these affected areas. However, resistance to mitotic-inhibiting herbicides has developed due to unaltered herbicide regimes. Suspected resistant populations were collected from across the state of Alabama and screened for resistance to prodiamine. Populations were then sequenced for known target-site mutations located on the alpha-tubulin gene. Two mutations were discovered that had been previously reported to confer resistance to dinitroaniline herbicides in other plants. The first mutation was at position 239 resulting in an amino acid change from threonine to isoleucine and the second mutation was at 268 resulting in an amino acid substitution from methionine to threonine. Different combinations of these mutations were observed in five different populations of Poa annua. The results from this study indicated that these mutations confer resistance to prodiamine and cross-resistance to dithiopyr. The IC50 obtained from dose-response trials values indicated that different mutations resulted in varying levels of resistance when compared to a known susceptible population. The level of resistance indicated by regression models and IC50 values ranged from 2 to 16-fold resistance to prodiamine when compared to the susceptible population. The level of resistance for dithiopyr ranged from 9 to 45-fold resistance when compared to the susceptible population. These results indicate resistant populations required more prodiamine and dithiopyr for control compared to the susceptible population." |
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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):
Russell, E. C. 2021. Poa annua (annual bluegrass) species response to preemergence herbicides with differing target-site mutations. Abstr. Annu. Meet. Weed Sci. Soc. Am. p. 113. |
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| Web URL(s):
https://wssa.net/wp-content/uploads/WSSA-Virtual-Annual-Meeting-all-abstracts-updated-4-12-2021ab_FINAL.pdf#page=113
Last checked: 11/01/2022
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2180085 |
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