| |
| Web URL(s): | http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2003.pdf#page=41
Last checked: 12/10/2013
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Boyd, Joh [John] W. |
|---|
| Author Affiliation: | Weed Scientist, University of Arkansas, Fayetteville, Arkansas |
|---|
| Title: | The effect of diuron on Tifway bermudagrass |
|---|
| Section: | Weeds of horticulture crops (project 2)
Other records with the "Weeds of horticulture crops (project 2)" Section
|
|---|
| Meeting Info.: | Coeur D'Alene, ID: March 12-15, 2001 |
|---|
| Source: | Proceedings of the Western Society of Weed Science. Vol. 56, 2003, p. 39-40. |
|---|
| Publishing Information: | Newark, CA: Western Society of Weed Science |
|---|
| # of Pages: | 2 |
|---|
| Keywords: | TIC Keywords: Diuron; Cynodon dactylon; Cynodon transvaalensis; Hybrid bermudagrasses; Herbicide resistance; Sod farms; Software; Photography; Percent living ground cover; Herbicide injury; Sprigs
|
|---|
| Cultivar Names: | Tifway |
|---|
| Abstract/Contents: | "We conducted three field trials from 2001-2002 to determine the tolerance of Tifway bermudagrass to diuron. The 2001 trial was located in central Arkansas on a commercial sod farm. The soil was a sandy loam (48% sand, 45% silt and 7% clay). The fertility regime for all trials was 1 lb N/1,000 sq ft every 3 weeks during the growing season. The sprigging rate for al trials was 400 bu/a. Diuron was applied to the 2001 study on July 10, 2001 at 1.5 and 3.0 lb ai/A, 7 days after planting. Oxadiazon at 3.0 lb ai/A was included as a standard treatment. Percent bermudagrass cover in all trials was determined by taking digital photographs from directly over the center of each plot and analyzing them using SigmaScanÒ software. SigmaScanÒ counts the number of green pixels (bermudagrass) in the digital photo and divides it by the number of total pixels to calculate a percent bermudagrass cover in the plot. In the 2001 study, diuron caused severe damage to Tifway sprigs. At 45 DAT (days after treatment) percent cover was 54% for the low rate of diuron and 13% for the high rate compared to 95% cover in the oxadiazon standard. The oxadiazon plots were at 100% cover by 86 DAT. The 1.5 lb ai/A diruon treatment required 122 DAT (November 9, 2001) to achieve complete cover. The 3.0 lb ai/A treatment had 65% cover by 122 DAT when a cold front ended the bermudagrass growing season. One complicating factor in 2001 was common bermudagrass contamination. Common bermudagrass has greater tolerance for diuron than Tifway and thus gains a competitive advantage following an application of diuron. The 2002 trials were located in northwest Arkansas on the University of Arkansas Research Farm. The soil was a loam (37% sand, 43% silt and 20% clay) that had been fumigated the previous year and was free of common bermudagrass as were the sprigs used for planting. In study I, an area was sprigged with Tifway bermudagrass on May 31, 2002 and then sprayed with diuron at 1.5 lb ai/a at 0, 10, 30 and 60 DAP (days after planting). The objective of this trial [was] to determine how long Tifway sprigs require to become sufficiently established to tolerate diuron. In study II, the trial was established on bare ground and sprayed with diuron at 1.5 lb/ai/a on May 31, 2002. Treatments in study II consisted of planting previously sprayed plots ata 30, 45 and 60 days after application. Control plots were included for each planting date. The objective was to determine how soon it would be feasible to plant Tifway sprigs after diuron had been applied. In study I at 118 DAT, percent bermudagrass cover in the 0, 10, 30 and 60 DAP treatments was 100, 68, 50, 39%, respectively. However, the 0 DAP treatment plots were replanted on July 30, 2002 because all sprigs were killed by the diuron applied immediately after planting. At the time that they were sprayed, the 60 DAP plots had achieved 100% cover. However, diuron injury was such that only 39% cover remained in these plots by the end of the growing season. In study II at 118 days after spraying, percent bermudagrass cover in the 30, 45 and 60 DAP treatments was 78, 76, and 91%, respectively. The growth of Tifway sprigs planted at 30 and 45 days after spraying was slowed by diuron residues. However, growth of sprigs planted at 60 DAT was comparable to that of the untreated. At 118 DAT, percent cover in the 30, 45 and 60 DAT treatments was 77, 78 and 91 %, respectively. Percent cover in the control plots was 100, 97 and 96%, respectively." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Boyd, Joh [John] W. 2003. The effect of diuron on Tifway bermudagrass. Proc. West. Soc. Weed Sci. 56:p. 39-40. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=97280 |
| If there are problems with this record, send us feedback about record 97280. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2003.pdf#page=41
Last checked: 12/10/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .W43 v.49 |
| Find from within TIC:
Digitally in TIC by file name: pwsws1998 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
