Full TGIF Record # 37888
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Diesburg, Kenneth L.
Author Affiliation:Assistant Professor, Department of Plant and Soil Science, Southern Illinois University, Carbondale, IL 62901-4415
Title:First year establishment of big bluestem, indiangrass, buffalograss, and switchgrass with amazameth under power line right of way
Meeting Info.:December 7-9, 1993, Kansas City, MO
Source:Proceedings of the North Central Weed Science Society. Vol. 50, 1995, p. 120.
# of Pages:1
Publishing Information:Champaign, IL: North Central Weed Science Society
Keywords:TIC Keywords: Establishment; Andropogon gerardii; Sorghastrum nutans; Bouteloua dactyloides; Panicum virgatum; Imazameth; Rights-of-way; Weed control
Abstract/Contents:"Imazameth (AC 263-222) has been investigated for use in peanut, control of nutsedge, and as a turfgrass growth regulator. It was tested, here, under a power line right-of -way for control of weed competition to prairiegrass establishment. Concentrations of 0.071 and 0.141 kg ha⁻¹ were compared to Siduron at 8.997 kg ha⁻¹ and an untreated control. Siduron was chosen as a check because it is the only preemergence herbicide labeled as safe for turfgrass establishment. Seven-year brush had been mowed with an hydroax the autumn before establishment. On June 6, the soil was culitivated to an eight-inch depth with a fluted disk pulled by a bulldozer. Three passes were necessary to fracture the soil adeqautely. The experimental design was a split-plot with species as whole plots and chemicals treatments as subplots. On June 13, big bluestem at 67 kg ha⁻¹, Indiangrass at 87 kg ha⁻¹, buffalograss at 195 kg ha⁻¹, and switchgrass at 35 kg ha⁻¹ were broadcast by hand into 27.4- by 68.6-m blocks, replicated four times. The seed was then lightly covered with a spike-tooth harrow, one pass. Treatments were spray-applied on June 24 with a hand-held boom with a pressurized CO₂ into 5.5- by 27.4-m plots. By that time, summer annual weed seeds had begun to germinate. Seedlings were in the one-leaf stage or less. On August 12, subjective visual estimates were made of percent plots covered by prairiegrass or weeds as a group. Untreated plots averaged 30% cover by weeds. Treatment with imazameth reduced in weed cover to 4%. There was no difference in weed control between the two concentrations of imazameth. Siduron was not effective in reducing weed cover. The predominant weed was giant foxtail. Prairiegrass stands were severely reduced where giant foxtail stands as highly concentrated. Indiangrass cover was not reduced by imazameth, but cover of big bluestem was reduced by 59%. Cover of buffalograss was reduced by 94%. Siduron reduced covers of Indiangrass 39%, big bluestem 31%, buffalograss 66%, and switchgrass 33%. Imazameth appears to have potential as a means to assure establishment of Indiangrass and big bluestem. Stands of these two species may be reduced at times, but the advantage of assuring little or no weed competition more than compensates for a reduced stand of these prairiegrass."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Diesburg, K. L. 1995. First year establishment of big bluestem, indiangrass, buffalograss, and switchgrass with amazameth under power line right of way. Proc. North Cent. Weed Sci. Soc. 50:p. 120.
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