Full TGIF Record # 108918
Item 1 of 1
Publication Type:
i
Refereed
Author(s):Bell, Gregory E.; Martin, Dennis L.; Kuzmic, Roseanne M.; Stone, Marvin L.; Solie, John B.
Author Affiliation:Bell: Assistant Professor; Martin: Associate Professor; Kuzmic: Agricultural Technician III, Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, Oklahoma; Stone & Solie: Professors, Department of Biosystems and Agriculture Engineering, Oklahoma State University, Stillwater, Oklahoma
Title:Herbicide tolerance of two cold-resistant bermudagrass (Cynodon spp.) cultivars determined by visual assessment and vehicle-mounted optical sensing
Source:Weed Technology. Vol. 14, No. 3, July-September 2000, p. 635-641.
Publishing Information:Champaign, IL: Weed Science Society of America.
# of Pages:7
Keywords:TIC Keywords: Herbicide resistance; Cold resistance; Cynodon dactylon; Cynodon transvaalensis; Cultivar variation; Visual evaluation; Optical analysis; Phytotoxicity; Postemergence herbicides; Spectral analysis; Herbicide injury; Quality; Herbicides; Comparisons
Cultivar Names:Midlawn
Abstract/Contents:"This study assessed the tolerance of 'Midlawn' (Cynodon dactylon X C. transvaalensis) and 'OKS 91-11' (C. dactylon) bermudagrass to commonly used postemergence herbicides and compared visual assessment with vehicle-mounted optical sensing (V-MOS) for evaluating herbicide phytotoxicity. Two postemergence herbicides were applied to mature stands of Midlawn and OKS 91-11 at two and four times label rates, and seven postemergence herbicides were applied at standard and two times label rates. Visual evaluation and spectral assessments were made for turf color 2, 7, 14, and 21 d after treatment (DAT). Triclopyr and triclopyr plus clopyralid at 2X and 4X label rates caused significant damage on OKS 91-11 and Midlawn bermudagrass in both July and September experiments. MSMA at 2X rate and MSMA + metribuzin at 1X and 2X rate caused up to 73% color reductions that dissapeared within 21 DAT in both cultivars. During July, 2,4D plus mecoprop plus dicamba at the 2X rate caused at least 18% injury to Midlawn bermudagrass for 21 d. Metribuzin was safe at the 1X rate but caused significant injury for up to 7 d at the 2X rate. Imazaquin and halosulfuron-methyl each caused significant damage on one rating date. Pronamide caused no change in color regardless of rate or time of application. OKS 91-11 tolerated 2X rates of 2,4-D plus mecoprop plus dicamba better than Midlawn, but cultivar responses to other herbicide treatments were similar. V-MOS was effective for measuring green color reduction on bermudagrass turf. V-MOS and visual evaluation were linearly related (P<0.01) at a strength of r = 0.58. Statistical results obtained using visual rating and V-MOS were the same in 86% of all cases."
Language:English
References:18
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bell, G. E., D. L. Martin, R. M. Kuzmic, M. L. Stone, and J. B. Solie. 2000. Herbicide tolerance of two cold-resistant bermudagrass (Cynodon spp.) cultivars determined by visual assessment and vehicle-mounted optical sensing. Weed Technol. 14(3):p. 635-641.
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