| |
| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=197
Last checked: 08/05/2013
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Author(s): | Flessner, Michael L.;
McElroy, J. Scott;
McCurdy, James D. |
|---|
| Author Affiliation: | Auburn University, Auburn, AL |
|---|
| Title: | Zoysiagrass cultivar respone to aminocyclopyrachlor and evaluation of various rating methods |
|---|
| Section: | Weed management in turf
Other records with the "Weed management in turf" Section
|
|---|
| Meeting Info.: | San Juan, Puerto Rico: January 24-26, 2011 |
|---|
| Source: | 2011 Proceedings, Southern Weed Science Society. Vol. 64, 2011, p. 89. |
|---|
| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Aminocyclopyrachlor; Cultivar evaluation; Herbicide evaluation; Herbicide injury; Herbicide resistance; Zoysia; Zoysia japonica; Zoysia japonica X Zoysia tenuifolia; Zoysia matrella
|
|---|
| Cultivar Names: | BK-7; Cavalier; Emerald; Empire; Meyer; Zorro |
|---|
| Abstract/Contents: | "Differential zoysiagrass cultivar response to herbicide treatment has been reported. Aminocyclopyrachlor (AMCP) is a herbicide that is labeled for use on zoysiagrass; however, some injury has been reported. This study evaluated the response of 'BK-7', 'Cavalier', 'Emerald', 'Empire', 'Meyer', and 'Zorro' zoysiagrass cultivars to AMCP. A secondary objective was to compare the two evaluation methods used. Cultivars were grown in 700 cm3 (79 cm2 surface area) pots containing native soil in greenhouse conditions (25 to 32C). Pots were mown twice weekly at 4.5 cm and received daily irrigation and weekly fertility. A completely randomized design with 4 replications was utilized. The experiment was re-randomized weekly to account for variations in microclimate. The experiment was conducted twice (repeated-in-time). Treatments included 0, 0.005, 0.02, 0.11, 0.52, 2.4, and 11 kg ai ha-1 AMCP, applied to each pot in a 280 L ha-1 spray volume. Data were collected 3, 5, and 7 weeks after treatment and included percent visual necrosis (%VN) independently evaluated by two researchers and normalized difference vegetative index (NDVI) assessment. Data were subjected to ANOVA using PROC GLM in SAS. Further analysis was conducted by rating date and data type utilizing a log-logistic regression technique. Pearsons correlation coefficients were calculated to determine if %VN and NDVI responses were related. ANOVA indicated that both %VN and NDVI data could be pooled across experiment repetitions and %VN data could be pooled across researchers. Researchers had a correlation coefficient of 0.958 (P < 0.001). Cultivars were found to be significant in the model (P < 0.001), indicating that not all cultivars responded similarly to AMCP treatment and that cultivars could not be pooled within species or across genus. A general trend using %VN data across rating dates indicate that Cavalier, Meyer, and Zorro are most tolerant, Emerald and Empire are moderately tolerant, and BK-7 is least tolerant to AMCP, of the cultivars evaluated. All zoysiagrass cultivars evaluated have sufficient tolerance (little to no injury) for the use of AMCP as a weed control agent at the labeled rate of 0.053 kg ha-1. NDVI assessment resulted in a greater standard error compared to %VN and could not differentiate between cultivars at any rating date, possibly due to algae contamination in pots. Therefore NDVI data were not used to rank the relative tolerance of the cultivars. However, NDVI and %VN data were highly correlated (-0.883, P < 0.001). NDVI data had lower pseudo R2 values compared to %VN data. %VN assessment explained more variation with greater precision than NDVI analysis." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Flessner, M. L., J. S. McElroy, and J. D. McCurdy. 2011. Zoysiagrass cultivar respone to aminocyclopyrachlor and evaluation of various rating methods. South. Weed Sci. Soc. Proc. 64:p. 89. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=226732 |
| If there are problems with this record, send us feedback about record 226732. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=197
Last checked: 08/05/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2207931 |
| Find from within TIC:
Digitally in TIC by file name: swssp2011 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
