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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Bhowmik, Prasanta C.;
Himmelstein, Frank J. |
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| Author Affiliation: | Dept. Plant and Soil Sciences, University of Massachusetts, Amherst, MA. |
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| Title: | Graminicides for Quackgrass Control |
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| Meeting Info.: | Held: January 6-8, 1987, Williamsburg, VA. |
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| Source: | Proceedings of the 1987 Annual Meeting of the Northeastern Weed Science Society. Vol. 41, 1987, p. 6. |
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| Publishing Information: | Ithaca, N. Y. : Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Elymus repens; Graminicide; Weed control; Surfactants
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| Abstract/Contents: | "Quackgrass [Agropyron repens (L.) Beauv.] is an aggressive, hard-to-kill perennial weed which spreads by seeds and rhizomes. Tillage or cultivation alone is not the most effective or efficient method of quackgrass control. Because of this, herbicides have become an important part of the current quackgrass control program under any cropping systems. Two field experiments were conducted at the Massachusetts Agric. Exp. Station. The objectives of the experiment were i) to evaluate the effectiveness of four graminicides in controlling quackgrass and ii) to compare the activity of these compounds with and without a surfactant. The experimental area was heavily infested with quackgrass. A preemergence application of alachlor and linuron at 1.68 and 1.12 kg/ha was made over the entire area for the control of annual grasses and broadleaf weeds. All postemerence treatments were applied to the quackgrass on May 10, 1986 with a backpack CO2 sprayer at a pressure of 152 kPa in 225 L/ha. The quackgrass was at the 4- to 5-leaf stage (30 to 35 cm) at the time of treatment. Plots were 3 by 6 m and the treatments were replicated four times in a randomized complete block design. Quackgrass control was rated on June 9 and August 4, 1986. Above-ground shoot counts and shoot dry weights were also determined on August 4, 1986. Three random soil cores (85.6 cm2 by 15 cm) were taken from each plot for the determination of live and dead rhizomes. Rhizomes were separated from soil and cut into pieces with at least one bud. These rhizome sections were incubated at 30 C and the numbers of live (sprouted) and dead rhizomes were determined over a period of two weeks. BAS 51702 (BASF), sethoxydim, fluazifop, and haloxyfop at 0.25 kg ai/ha were used alone or in combination with oil concentrate (1.25% v/v) or in combination with oil concentrate (1.25% v/v) and ammonium sulphate at 2.8 kg/ha. The addition of ammonium sulphate to the treatment of BAS 51702 at 0.25 kg/ha plus BAS 09002 (1.25% v/v) enhanced quackgrass control (23%) as compared to the treatment without ammonium sulphate. The enhanced quackgrass control was also demonstrated by reduced number (14%) of live rhizomes. On the other hand, the addition of ammonium uslphate to either sethoxydim or fluazifop treatment with oil concentrate (1.25% v/v) did not increase quackgrass control, ranging form 59 to 73%. Irrespective of the addition of oil concentrate or ammonium sulphate, haloxyfop (0.25 kg/ha) treatments resulted in excellent (92 to 95%) quackgrass control (August 14, 1986). Only 8% of the rhizomes were viable with haloxyfop plus oil concentrate (0.25 kg/ha plus 1.25%, v/v) as compared to 22% viable rhizomes with haloxyfop treatment alone (without an oil concentrate)." |
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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., and F. J. Himmelstein. 1987. Graminicides for Quackgrass Control. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 41:p. 6. |
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MSU catalog number: SB 610 .N62 |
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