Full TGIF Record # 19514
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Author(s):Powell, A. J. Jr.; Tapp, Linda
Title:Spot treatment of weeds
Source:Kentucky Turfgrass Research. 1986, p. 59-61.
Publishing Information:Lexington, KY: University of Kentucky, College of Agriculture, Cooperative Extension Service
Series:Progress Report 303
Keywords:TIC Keywords: Broadleaf weed control; Non-selective herbicides; Poa pratensis; Professional services; Viola; Plantago lanceolata; Hand-held sprayers; Spot spraying; Spray guns; Herbicides; Spraying equipment; 2,4-D + Mecoprop; 2,4-D + Mecoprop + Dicamba; Glyphosate; Chemical weed control
Abstract/Contents:Summer 1986 test to determine spot treatment herbicide products used on home lawns could be used by the professional turf industry. Objectives were to determine: 1) if the number of squirts or pulses from the applicators influenced efficacy and or turf injury, 2) which container type worked best and 3) how much area was covered by the non-adjustable applicator when held at the recommended height above the plant surface. K-Gro Broadleaf weed killer and K-Gro Grass weed killer and Ortho Weed B Gon and Ortho Kleenup brands were evaluated for broadleaf weed and non-selective grass control. A Kenblue Kentucky bluegrass sod was selected for these studies. Buck horn plaintain and wild violets were sprayed with the broadleaf weed herbicides and bluegrass was sprayed with glyphosate products. Excellent plantain control was achieved with all three broadleaf herbicides when sprayed at a height of one foot above ground. At the two foot height, very little control was achieved except for the Ortho pressure product that contained the highest herbicide concentration. Extremely severe turfgrass burn was caused by the Ortho hand trigger product when held at a one foot height and some burn occurred with the Ortho pressurized product. Surprisingly, going from one to four bursts (squirts) made very little diffrence in % control or turf burn. Crude rate calculations were normal for hand trigger applications but were 10 times higher for the pressurized products. Only the ortho pressurized product showed herbicidal effects on wild violets. The glyphosate test using K-Gro product gave excellent kill while the Ortho product showed a slight effect on the bluegrass. Preliminary tests indicate additional research is needed to evaluate both the efficacy and risks involved in spot spraying before these products become practical in the professional turf market. Testing will be continued in 1987.
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Powell, A. J. Jr., and L. Tapp. 1986. Spot treatment of weeds. KY. Turfgrass Res. p. 59-61.
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