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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1991_vol45.pdf#page=145
Last checked: 07/24/2013
Requires: PDF Reader
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): | Sterling, R. D.;
Carlson, D. R.;
Dougherty, D. E. |
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| Title: | Turfgrass root length, strength, and mass response to quinclorac |
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| Source: | Proceedings of the 45th Annual Meeting of the Northeastern Weed Science Society. Vol. 45, 1991, p. 145. |
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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: Quinclorac; Root growth; Root inhibition; Root pruning; Root strength; Strength testing
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| Abstract/Contents: | "Quinclorac (BAS 514) is an experimental herbicide being developed by BASF for early postemergence crabgrass and broadleaf weed control in turf. Many dinitroanilines used for preemergence crabgrass control in turf have deleterious effects on root growth. Three separate approaches were used to determine whether quinclorac inhibited root length, strength, and mass as compared to the commercial standard pendimethalin. A petri dish assay with pregerminated corn was used to determine if quinclorac inhibited root growth. Silica sand was treated with 30 mls of dilute herbicide solution. The solution concentrations of quinclorac applied at 2.0, 1.0, and 0.5 ppm. Pendimethalin was applied at 3.0 and 1.5 ppm. Treatments were replicated three times. After twenty four hours, quinclorac inhibited root growth 14%, 3%, and 0% at 2.0, 1.0, and 0.5 ppm, respectively. The pendimethalin treated seedlings exhibited 81% inhibition at 3.0 ppm and 58% at 1.5 ppm. Corn seedlings treated with pendimethalin had swollen meristems, while the quinclorac roots appeared normal. To determine herbicide affects on root mass, forty-two 0.45 liter pots were filled with a sandy loam soil and watered to field capacity. The bare soil was sprayed with quinclorac at 2.0, 1.0, and 0.5 kg/ha, and with pendimethalin at 3.0 and 1.5 kg/ha. Each treatment contained seven replications. After the soil was treated, a mixed sod of 'Kenblue' bluegrass/'Rebel' tall fescue was placed on the soil surface and allowed to grow for four months. After four months, the root mass was cut below the sod. The roots were then washed, dried and weighed. Both compounds affected turfgrass root mass. Treatments with quinclorac resulted in a 19, 17, and 15% decrease in root mass at 2.0, 1.0, and 0.5 kg/ha, respectively, while pendimethalin resulted in a 36% decrease in root mass at 3.0 kg/ha and a 32% decrease at 1.5 kg/ha. To determine turfgrass root strength, a field study was conducted using a dynameter which measures the force required to pull a 929 cm2 sod piece from the ground. The soil surface was treated with quinclorac at 2.0, 1.0, and 0.5 kg/ha and pendimethalin at 3.0 and 1.5 kg/ha. Metal grates were then placed over the treated area. A mixed sod of 'Kenblue' bluegrass/'Rebel' tall fescue was placed over the grates and allowed to grow from October to December. When the sod was pulled, quinclorac treatment resulted in a 4, 3, and 0% decrease at 2.0, 1.0, and 0.5 kg/ha respectively, while pendimethalin reduced root strength by 36% at 3.0 kg/ha and 18% at 1.0 kg/ha. Quinclorac caused little or no inhibition of root length, strength, or mass in the mixed turf compared to pendimethalin quinclorac on other turf species." |
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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):
Sterling, R. D., D. R. Carlson, and D. E. Dougherty. 1991. Turfgrass root length, strength, and mass response to quinclorac. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 45:p. 145. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1991_vol45.pdf#page=145
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 |
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