Full TGIF Record # 265526
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Web URL(s):http://www.newss.org/proceedings/proceedings-2014.pdf#page=33
    Last checked: 10/05/2015
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Publication Type:
i
Report
Author(s):Neal, J.; Harlow, C.
Author Affiliation:North Carolina State University, Raleigh, NC
Title:Spray volume and concentration effects on broadleaf weed control with Fe-HEDTA
Meeting Info.:Philadelphia, Pennsylvania: January 6-9, 2014
Source:Proceedings of the Sixty-eighth Annual Meeting of the Northeastern Weed Science Society. Vol. 68, 2014, p. 32.
Publishing Information:College Park, Maryland: The University of Maryland
# of Pages:1
Keywords:TIC Keywords: Broadleaf weed control; Ground cover; Herbicide trials; Spray volumes; Spraying practices
Trade Names:Fiesta
Abstract/Contents:"Fe-HEDTA (trade name: Fiesta) is currently marketed for broadleaf weed control in warm-season and cool-season turf. Application instructions on the label suggest a dilution of 5 oz product per gallon applied in approximately 2.5 to 10 gallons per 1000 sq ft (109 to 436 gallons per acre) spray volume. These guidelines provide a wide range of doses and costs per use. Two experiments were conducted to evaluate the influence of spray carrier volume, spray concentration and dose of Fe-HEDTA on weed control. FeHEDTA product was diluted to 1.95%, 3.9% and 7.8% by volume in water and each dilution applied in 50, 100, 200 and 400 GPA spray volume using a CO2 pressurized sprayer equipped with 8008 flat fan nozzles calibrated to deliver 50 GPA. Higher spray volumes were achieved by multiple (2, 4, or 8) passes over the plot using the same calibrated sprayer. One test was on established Trifolium repens and Taraxacum officinale. Treatments were applied on October 16, 2012 and again on November 6, 2012. The second site was a low maintenance bermudagrass (Cynodon dactylon L. (Pers.)) turf infested with a mixture of winter annual broadleaf weeds including Veronica persica, Veronica hederifolia, and Sherardia arvense. Treatments were applied on March 29, 2013 and re-applied on April 26, 2013. Percent broadleaf weed cover was visually estimated and percent cover estimates were conducted. Both tests were conducted in a randomized complete block design with 4 replications and individual plots were 1 m2 in size. Data were also averaged by actual Fe-HEDTA dose, across all spray volume and concentrations variables, then plotted against percent control or percent ground cover. Regression equations were fit to these data. Results were consistent between experiments. Fe-HEDTA produced rapid necrosis of broadleaf weed foliage. Foliage turned black within 48 hours of treatment but re-growth was visible within one week of treatment. Weed control increased with increasing concentration and spray volume. However, when control data are plotted against actual Fe-HEDTA dose (across all concentrations and spray volumes), the results fit a logistic model (R2 values between 0.82 and 0.93) suggesting that the actual dose applied has a greater influence on resulting levels of weed control than do the concentration or spray volume selected."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Neal, J., and C. Harlow. 2014. Spray volume and concentration effects on broadleaf weed control with Fe-HEDTA. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 68:p. 32.
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Web URL(s):
http://www.newss.org/proceedings/proceedings-2014.pdf#page=33
    Last checked: 10/05/2015
    Requires: PDF Reader
    Notes: Item is within a single large file
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