| |
| Web URL(s): | http://www.newss.org/proceedings/proceedings_2007.pdf#page=33
Last checked: 06/28/2013
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Henry, G. M.;
Hixson, A. C.;
Yelverton, F. H. |
|---|
| Author Affiliation: | North Carolina State Univ., Raleigh |
|---|
| Title: | Fenarimol tolerance of an annual bluegrass biotype |
|---|
| Section: | Research posters
Other records with the "Research posters" Section
|
|---|
| Meeting Info.: | Baltimore, Maryland: January 2-5, 2007 |
|---|
| Source: | Proceedings of the Sixty-First Annual Meeting of the Northeastern Weed Science Society. Vol. 61, 2007, p. 15. |
|---|
| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Biotypes; Fenarimol; Fungicide efficacy; Fungicide evaluation; Fungicide resistance; Poa annua control
|
|---|
| Abstract/Contents: | "Annual bluegrass (Poa annua L.) is one of the most problematic weed species in high maintenance turfgrass. Its lime green color contrasts that of desired turfgrass species, giving the turf a blotchy, mottled appearance and disrupting the overall color uniformity. Fenarimol (RubiganTM A.S. Turf and Ornamental) is a highly effective locally systemic fungicide that is labeled for the control of a number of economically important turfgrass diseases. However, fenarimol is also labeled for the control of Poa annua in overseeded bermudagrass greens and tees, tall fescue, and Kentucky bluegrass. Annual bluegrass is adaptable to many environments. Its genetic diversity varies widely, differing in populations occurring over as little as a 3 m2 area. Broad genetic diversity plus the selection pressure of a single herbicide family over time contribute to the potential for herbicide tolerance. A suspected tolerant Poa annua population had been treated with fenarimol during the onset of winter dormancy in bermudagrass for the past six consecutive years at the Desert Mountain Golf Club in Scottsdale, AR. After investigating application practices, application dates, and cultural methods, the suspected fenarimol tolerant Poa annua biotype was collected in the spring of 2004. Plants were obtained from the tees of several different holes and transplanted into the greenhouse and grown to maturity. Mature seeds were removed from the plants as they ripened and placed in storage. Dose-response experiments were conducted to determine the level of tolerance of the collected biotype and a susceptible biotype to fenarimol. Ten seedlings with a root length of at least 4 mm were placed on a Petri dish containing 25 ml of herbicide agar solution and incubated for 7 days in the growth chamber at 15/25 C on a 10-hr photoperiod. Fenarimol assay concentrations consisted of a non-treated check and 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, and 32 mmol treatments. Each treatment was replicated four times and randomized in the growth chamber to account for confounding factors. Shoot and root length measurements (mm) were taken at 0, 3, and 7 days after seedling transfer to agar plates. Data were subjected to analysis of variance and tested for goodness of fit to linear and quadratic functions. Dose-response curves suggest that the tolerant Poa annua biotype was less sensitive to fenarimol than the susceptible biotype. A 4-6-fold increase in tolerance to fenarimol was observed when comparing Poa annua root growth to the susceptible biotype at the three highest fenarimol assay concentrations 3 and 7 days after seedling transfer to the agar plates. The presence of fenarimol tolerant Poa annua, in addition to previously documented biotypes tolerant to several herbicide classes, may indicate a need for the integration of resistance management into golf course management practices." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Henry, G. M., A. C. Hixson, and F. H. Yelverton. 2007. Fenarimol tolerance of an annual bluegrass biotype. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 61:p. 15. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=223531 |
| If there are problems with this record, send us feedback about record 223531. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.newss.org/proceedings/proceedings_2007.pdf#page=33
Last checked: 06/28/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 |
| Find from within TIC:
Digitally in TIC by file name: newss2007 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
