Full TGIF Record # 240863
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Publication Type:
Author(s):Hart, R. D.; Rogers, B. J.; Lee, O. C.
Author Affiliation:Department of Botany and Plant Pathology, Purdue University, Agricultural Experiment Station
Title:Response of crabgrass in bluegrass turf to organic arsonates
Section:Control of weeds in horticultural crops: Turf
Other records with the "Control of weeds in horticultural crops: Turf" Section
Meeting Info.:Omaha, Nebraska: December 6-8, 1955
Source:Twelfth Annual Research Report: North Central Weed Control Conference. 1955, p. 131.
# of Pages:1
Publishing Information:[Lincoln, Nebraska]: [North Central Weed Science Society]
Abstract/Contents:"Plots of Kentucky bluegrass (Poa pratensis) infested with crabgrass (Digitaria sanguinalis), regularly watered and mowed to 1 ½ inches, were used for this test. Treatments consisted of two and three applications at five-day intervals of disodium methyl arsonate at 3 and 5 lbs/A and disodium benzyl arsonate at 7, 9, and 11 lbs/A of actual material. All were applied as sprays with 30 gal of water/A. Spray dates were August 19, 24, and 29. The crabgrass was in a late vegetative state of growth at the time of treatments. Observations were made on September 5. Two applications at 11 lbs and three applications at 5 lbs of methyl arsonate caused moderate to severe discoloration of the bluegrass, primarily a tip burn. Discoloration from other treatments was slight to moderate. Final evaluation was made on September 30. No discoloration was noted from any treatment. Both 3 and 5 lb rates of the methyl arsonate applied two and three times gave 80% control. Both 9 and 11 lb rates of the benzyl arsonate applied two and three times gave approximately 50% control. Treatments made earlier on a golf course fairway as a whole did not give satisfactory control. Successive applications on June 22, 29, and July 26 of the benzyl arsonate at rates of 7 and 11 lbs/A gave approximately 60% control of the crabgrass without permanent injury to the bluegrass. Varying rates applied during June and July indicated very little difference in tolerance of bluegrass and crabgrass to these materials. The greatest degree of injury occurred when sprays were applied during high temperatures."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hart, R. D., B. J. Rogers, and O. C. Lee. 1955. Response of crabgrass in bluegrass turf to organic arsonates. Proc. North Cent. Weed Sci. Soc. p. 131.
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