Full TGIF Record # 73886
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Publication Type:
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Report
Content Type:Abstract or Summary only
Author(s):Bunnell, B. T.; Higingbottom, J. K.; McCarty, L. B.; Baker, R. D.
Author Affiliation:Bunnell, Higingbottom, McCarty: Clemson University, Department of Horticulture, Clemson, SC; Baker: The Scotts Company, Marysville, OH
Title:Control of smooth crabgrass (Digitaria ischaemum) with two commercial products at various rates and timings
Section:Section II: Weed management in turf, pasture and rangeland
Other records with the "Section II: Weed management in turf, pasture and rangeland" Section
Meeting Info.:53rd Annual Meeting, Tulsa, OK, January 24-26, 2000
Source:Southern Weed Science Society Proceedings. Vol. 53, 2000, p. 51.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:1
Keywords:TIC Keywords: Weed control; Crabgrass control; Digitaria ischaemum; Application rates; Application timing; Herbicide evaluation; Agrostis stolonifera; Pendimethalin; Dithiopyr; Growth stages; Preemergence weed control; Postemergence weed control; Cynodon dactylon; Herbicide-fungicide combinations
Abstract/Contents:"Smooth crabgrass (Digitaria ischaemum) control is performed with a variety of chemicals at various application timings and rates. Smooth crabgrass is a spring and summer annual which invades uniform turf areas with its coarse texture, off green color, and prostrate growth habit. A current control trend involves spring applications of preemergence herbicides attached to a fertilizer carrier. The objective of this research was to observe the efficacy of two commercial products at various rates and timings for preemergence and early postemergence control of smooth crabgrass. Two studies were performed the spring and summer of 1999. One study was performed in the greenhouse and the other on a golf course in Clemson on common bermudagrass (Cynodon dactylon). Treatments included two fertilizer and herbicide combinations at various rates and growth stage applications. Products used were TurfBuilder [Turf-Builder] + Halts 1.21 G (30-3-4 + pendimethalin) at 1.5 lbs. ai/A and 1.75 lbs. ai/A and Sta-Green 0.14 G(28-3-4 + dithiopyr) at 0.18 lbs. ai/A and 0.22 lbs. ai/A. Applications were made at three stages of smooth crabgrass growth: preemergence, one-leaf stage, and three-leaf stage. The greenhouse study observed smooth crabgrass seed germination in 4 X 4 inch pots. The field study observed smooth crabgrass control in a common bermudagrass golf course rough with plot size of 5 X 10 ft. Ratings were taken every 2 weeks and monthly for the greenhouse and field study, respectively. Smooth crabgrass control was rated on a 0-100% scale with 100=complete control. Minimal acceptable smooth crabgrass control was 70%. The greenhouse study showed best (>90%) smooth crabgrass control with preemergence applications of TurfBuilder [Turf-Builder] + Halts at both rates at 3 WAT (weeks after treatment), 6 WAT and 9 WAT. Sta-green provided >90% control at 6 and 9 WAT. Early postemergence applications at the one-leaf stage showed >90% control with both products and rates at 8 WAT and ~80% control at 5 WAT. High rates of Sta-Green and Turf-Builder +Halts [+ Halts] provided 80 and 85% control, respectively. Low rates of both products provided 75% control. Three-leaf stage applications provided 75% smooth crabgrass control with both rates of Turf-Builder + Halts at 7 WAT. The field study provided similar results with preemergence applications of both rates of Turf-Builder + Halts providing 85% smooth crabgrass control at 12 WAT and 75% control at 22 WAT. Early postemergence applications of both rates of Turf-Builder + Halts at the one-leaf stage provided good (80-90%) smooth crabgrass control through 20 WAT. Three-leaf stage applications of Turf-Builder +Halts [+ Halts] at the low rate provided 70% control at 9 and 19 WAT, high rates provided 80% control on the same dates. Sta-Green did not provide acceptable smooth crabgrass control. Research will continue with preemergence and early postemergence products combining herbicides and fertilizers for crabgrass and other grassy weed control. Adjustments in application timings, rates, and fertilizer formulation may improve herbicide efficacy and health of desired turf."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bunnell, B. T., J. K. Higingbottom, L. B. McCarty, and R. D. Baker. 2000. Control of smooth crabgrass (Digitaria ischaemum) with two commercial products at various rates and timings. South. Weed Sci. Soc. Proc. 53:p. 51.
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MSU catalog number: SB 611 .S6 v.52
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