Full TGIF Record # 240563
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Publication Type:
Author(s):Switzer, C. M.
Author Affiliation:Department of Botany, Ontario Agricultural College, Guelph, Ontario
Title:Residual effects of some herbicides used for control of crabgrass in turf
Meeting Info.:St. Louis, Missouri: December 11-13, 1961
Source:Eighteenth Annual Research Report: North Central Weed Control Conference. 1961, p. 92-93.
# of Pages:2
Publishing Information:[Lincoln, Nebraska]: [North Central Weed Science Society]
Abstract/Contents:"An area treated with various herbicides on May 12, 1960 (see Res. Rept. Nat'l. Weed Comm., East Sec. (Canada) Pg. 102, 1960) was observed throughout the summer of 1961. Some crabgrass was found in all plots but those treated with I-2,4-dichlorophenyl O-methyl isopropylphosphoramidothioate (Zytron) at 8, 16 and 24 lb/A (either liquid or granular) and those treated with tricalcium arsenate at 15 lb/1000 sq.ft. or with dimethyl 2,3,5,b-tetrachloroterephthalate (Dacthal) granular at 15 lb/A had considerably less than the others. Control with both 16 and 24 lb/A of Zytron exceeded 90% throughout the summer. The 8 lb. rate (granular) gave fair control, but liquid Zytron at 8 lb/A did not have as much residual effect. In another experiment, set up to study the effectiveness of fall application of preemergence crabgrass herbicides, plots were treated on Nov. 14, 1960, with Zytron, liquid and granular (10, 20, 30), Dacthal, wettable powder and granular (10, 15, 20), and tricalcium arsenate (5, 7½, 10, 15). Rates of Zytron and Dacthal are lb. active/A, and of tricalcium arsenate are lb. active/1000 sq. ft. Only the plots receiving the low rate of DActhal granular and the two lowest rates of tricalcium arsenate were not completely free of crabgrass on July 21, 1961. However, by Aug. 31, crabgrass was noted in all plots except those receiving 20 or 30 lb. of Zytron or 20 lb. of Dacthal, although plots treated with Zytron 10, Dacthal 15 or tricalcium arsenate 15 contained only a few crabgrass plants. Only the highest rate of Zytron caused any turf damage (some thinning) and even those plots recovered by early June. A marked stimulation of bluegrasses was noted in all Zytron treated plots."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Switzer, C. M. 1961. Residual effects of some herbicides used for control of crabgrass in turf. Proc. North Cent. Weed Sci. Soc. p. 92-93.
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