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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1993_vol47.pdf#page=131
Last checked: 07/24/2013
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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): | Bhowmik, P. C. |
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| Author Affiliation: | Associate Professor, Department of Plant and Soil Sciences, University of Massachusetts, Amherst, MA |
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| Title: | Tolerance of cool-season turfgrass species to herbicides |
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| Section: | Turfgrass and plant growth regulators workshop - Thursday January 7
Other records with the "Turfgrass and plant growth regulators workshop - Thursday January 7" Section
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| Meeting Info.: | Baltimore, MD: January 4-7, 1993 |
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| Source: | Proceedings of the 47th Annual Meeting of the Northeastern Weed Science Society. Vol. 47, 1993, p. 131. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cool season turfgrasses; Herbicide resistance; Preemergence herbicides; Herbicides; Non-target effects; Agrostis stolonifera; Quality; Herbicide injury; Poa pratensis; Tank mix; Application rates; Root growth; Regrowth; Tillers (vegetative); Rhizomes; Application timing; Quinclorac; Dithiopyr; Benfluralin; Growth
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| Cultivar Names: | Baron; Penncross |
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| Abstract/Contents: | "One of the important tools in any successful weed management program is the use of preemergence herbicides. Dinitroaniline herbicides such as benefin, pendimethalin, and trifluralin are the leading herbicides. Other preemergence herbicides include bensulide, DCPA, and oxadiazon, including two recent additions: dithiopyr and prodiamine. In general, Kentucky bluegrass (Poa pratensis L.), perennial ryegrass (Lolium perenne L.), red fescue (Festuca rubra L.) and other cool-season turfgrasses are tolerant to most of these herbicides. Some species may be susceptible to a herbicide. These herbicides provide residual preemergence control of many weeds. The residual activity is dependent upon the threshold concentration of the applied herbicide and its rate. Repeated applications of these herbicides can cause restricted root growth, reduced tillers and rhizomes, and stand thinning. In a 'Penncross' creeping bentgrass (Agrostis palustris Huds.) trial in 1986, quinclorac at 0.56 to 2.2 kg ha⁻¹, applied postemergence, injured (13 to 55%) bentgrass, although the treated bentgrass recovered later in the season. Final bentgrass quality was unaffected. Pendimethalin at 0.8 kg ha⁻¹ did not injure bentgrass. However, the highest rate (3.4 kg ha⁻¹) of pendimethalin gave initial bentgrass injury (20%) and resulted in stand thinning. It prevented the stolons from normal rooting and resulted in increased stolons without roots. Fenoxaprop at 0.13 kg ha⁻¹, applied postemergence, did not injure bentgrass. During 1987-89, turfgrass injury (15 to 38%) and thinning of Kentucky bluegrass was noted with the premix combination (1:2 ratio) of trifluralin and benefin at 4.5 kg ha⁻¹. Benefin at 4.5 kg ha⁻¹ also injured Kentucky bluegrass. Higher rates of benefin (3.3 and 4.5 kg ha⁻¹) and the premix combination of trifluralin and benefin (3.4 and 4.5 kg ha⁻¹) inhibited tiller production and rhizome growth of Kentucky bluegrass 4 and 8 weeks after application. Pendimethalin and prodiamine did not reduce tiller production or rhizome development and growth. During 1989-91, dithiopyr treatments (0.3 to 1.1 kg ha⁻¹) did not reduce the quality or color of 'Baron' Kentucky bluegrass. Root regrowth, tiller and rhizome numbers were unaffected with the 1.1 kg ha⁻¹ rate. Single annual spring application of dithiopyr for three consecutive years showed no adverse effects on Kentucky bluegrass. Perennial ryegrass was tolerant up to 1.7 kg ha⁻¹ of dithiopyr after single annual application of three years. Root regrowth, tiller and rhizome development were unaffected. On a putting green, 'Penncross' bentgrass was tolerant to dithiopyr up to 1.1 kg ha⁻¹. Dithiopyr rates up to 1.1 kg ha⁻¹ did not adversely affect bentgrass color, quality, stolon development, or root regrowth. Single annual spring applications of dithiopyr (0.3 to 1.1 kg ha⁻¹) for four consecutive years did not reduce overall quality of bentgrass." |
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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):
Bhowmik, P. C. 1993. Tolerance of cool-season turfgrass species to herbicides. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 47:p. 131. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1993_vol47.pdf#page=131
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 53 |
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