Full TGIF Record # 229030
Item 1 of 1
Publication Type:
i
Report
Author(s):Middlebrooks, P. B.; Withrow, K. D.; Miller, J. F.
Author Affiliation:Middlebrooks and Withrow: Georgia Department of Transportation, Atlanta, Ga.; Miller: Georgia Extension Service, Athens, Ga.
Title:Controlled droplet applications for roadsides in Georgia
Section:The control of weeds and woody plants on utility, railroad and highway rights-of-ways, and on industrial sites
Other records with the "The control of weeds and woody plants on utility, railroad and highway rights-of-ways, and on industrial sites" Section
Meeting Info.:Biloxi, Mississippi: January 18-20, 1983
Source:Proceedings: Southern Weed Science Society 36th Annual Meeting. Vol. 36, 1983, p. 319.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Abstract/Contents:"Two years of experimentation has led the Georgia Department of Transportation to accept Controlled Droplet Application (CDA) as a viable alternative to high volume spray application. Potential savings of time and money make the use of CDA's very attractive. Testing consisted of two small plot trials and a number of large test sections with a 1200 gallon, 20 foot boom truck mounted sprayer with 5 CDA nozzles. In May 1981, a drift test was conducted with a hand held CDA (Herbi). Paraquat was sprayed under high wind conditions (gusts to 30-35 MPH) at different heights and spacings from sensitive vegetation. Results show a pattern shift varying with height of nozzle but very little drift. On July 16, 1981, 500 sq. ft. plots were established on bahiagrass stands at Tifton, Georgia. A 40 gallon per acre conventional hand sprayer was compared to the CDA for bahiagrass seedhead control. MSMA at 2 lbs. active ingredient per acre was used in one test and glyphosate at one quarter pound ai per acre in another. Ratings on August 18 showed no lasting seedhead suppression from the high volume plots but good seedhead and foliage suppression from the CDA plots. Micro Max CDA's on a 1200 gallon sprayer were protected from hitting signs by a metal rod guard and a breakaway bracket. Seven test sections were sprayed in late 1981 and 1982 to determine the durability and any operational problems with CDA's. Overall the CDA's worked well. A new direct drive CDA is judged an improvement over the previous belt drive unit. The addition of an in line filter to the discharge line of the sprayer decreased clogging and clean out time of the individual filter at each CDA. A device is needed to alert the operator if a nozzle stops operating. The test sections were sprayed with MSMA at the rate of 1.8 lbs. ai/acre. Total spray volume was 1.8 gallons per acre. Results show bahiagrass seedhead control as good or better than conventional nozzles at 30 gallons per acre and MSMA at 2 lbs. ai/acre. In late 1982, CDA spacing was increased to 60" and tests made over moisture sensitive paper. Results show CDA spacing to be about right and drift to be less than with flood jet nozzles. It is anticipated that two CDA sprayers will be used in 1983."
Language:English
References:0
Note:"Room for growth: Our responsibility"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Middlebrooks, P. B., K. D. Withrow, and J. F. Miller. 1983. Controlled droplet applications for roadsides in Georgia. South. Weed Sci. Soc. Proc. 36:p. 319.
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