Control of Green Sagewort in the Nebraska Sandhills

Weed Science ◽  
1975 ◽  
Vol 23 (6) ◽  
pp. 465-469
Author(s):  
L. A. Morrow ◽  
M. K. McCarty
Keyword(s):  
Acetic Acid ◽  
Weed Control ◽  
Propionic Acid ◽  
Nitrogen Fertilizer ◽  
Herbicide Treatments ◽  
Nebraska Sandhills ◽  
Anisic Acid ◽  
Artemisia Campestris ◽  
Dichlorophenoxy Acetic Acid

Plots were established in 1970 in the Nebraska Sandhills for the control of green sagewort (Artemisia campestris L.). Herbicides were applied in 1970; 1970 and 1971; 1970, 1971, and 1972; and 1970 and 1972. Nitrogen fertilizer at 45 kg/ha was applied in 1973. Herbicide treatments included 2,4-D amine [(2,4-dichlorophenoxy)acetic acid], 2,4-D ester, 2,4,5-T [(2,4-5-trichlorophenoxy)acetic acid], silvex [2-(2,4,5-trichlorophenoxy)propionic acid], and mixtures of picloram (4-amino-3,5,6-trichloropicolinic acid) or dicamba (3,6-dichloro-o-anisic acid) and 2,4-D amine. Herbicides were most effective for the control of broadleaf weeds when they were applied in 3 consecutive years or in alternate years. Herbicides applied only once did not effectively control broadleaf weeds. When nitrogen was applied after weed control treatments, weed production increased if herbicide applications were not effective. If weed control treatments were effective, nitrogen did not affect weed production.

Response of Four Bermudagrass (Cynodon dactylon) Cultivars to Fall-Applied Herbicides

Weed Science ◽  
1983 ◽  
Vol 31 (6) ◽  
pp. 771-774 ◽  
Author(s):  
B. J. Johnson
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Cynodon Dactylon ◽  
Winter Survival ◽  
Stellaria Media ◽  
Combination Treatments ◽  
Herbicide Treatments ◽  
Anisic Acid ◽  
Dichlorophenoxy Acetic Acid ◽  
Delayed Growth

Combination treatments of 2,4-D [(2,4-dichlorophenoxy)acetic acid] + mecoprop {2-[(4-chloro-o-tolyl) oxy] propionic acid} + dicamba (3,6-dichloro-o-anisic acid) injured actively growing bermudagrass [Cynodon dactylon(L.) Pers. # CYNDA] immediately after treatment. Treatments made at the normal (1.1 + 0.6 + 0.1 kg ai/ha) rate in August, September, or October, did not affect winter survival. A triple rate (3.3 + 1.8 + 0.3 kg/ha) delayed growth of ‘Tifgreen’ and ‘Tifdwarf’ more the following April than ‘Tifway’ and ‘Ormond’. Due to a reduction in turf stand from herbicide treatments, the cover of common chickweed [Stellaria media(L.) Cyrillo # STEME] was higher in plots to which herbicides were applied in August or September than in untreated plots. The cover of weeds was lower in Tifway and Ormond plots than in Tifgreen and Tifdwarf plots.

Influence of Nitrogen on Recovery of Bermudagrass (Cynodon dactylon) Treated by Herbicides

Weed Science ◽  
1984 ◽  
Vol 32 (6) ◽  
pp. 819-823 ◽  
Author(s):  
B. Jack Johnson
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Cynodon Dactylon ◽  
Turf Quality ◽  
Herbicide Treatment ◽  
Anisic Acid ◽  
Dichlorophenoxy Acetic Acid

Bermudagrass [Cynodon dactylon(L.) Pers. ‘Tifway’] injured by MSMA (monosodium methanearsonate) plus metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one] or 2,4-D [(2,4-dichlorophenoxy)acetic acid] plus mecoprop {2-[(4-chloro-o-tolyl)oxy] propionic acid} plus dicamba (3,6-dichloro-o-anisic acid) recovered more rapidly when nitrogen (N) was applied in sequence with the herbicides than when no N was applied. Bermudagrass recovery was faster with less injury within 2 weeks after herbicide treatment when N was applied at the first MSMA plus metribuzin treatment or when N was applied at 2 weeks after the first 2,4-D plus mecoprop plus dicamba treatment. Turf quality at 4 weeks or later was consistently as good or better in plots where N was applied at 2 weeks after the first application of either herbicide combination than when N was applied earlier.

Effect of Timing of Spring Applications of Herbicides on Quality of Bermudagrass (Cynodon dactylon) Turf

Weed Science ◽  
1985 ◽  
Vol 33 (2) ◽  
pp. 238-243 ◽  
Author(s):  
B. Jack Johnson ◽  
Robert E. Burns
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Cynodon Dactylon ◽  
Turf Quality ◽  
Anisic Acid ◽  
Dichlorophenoxy Acetic Acid

Oxadiazon [2-tert-butyl-4(2,4-dichloro-5-isopropoxyphenyl)-δ2-1,3,4-oxadiazolin-5-one] applied to dormant bermudagrass [Cynodon dactylon(L.) Pers. ‘Tifway’ ♯ CYNDA] retarded early foliar growth more than other herbicides evaluated. When bensulide [O,O-diisopropyl phosphorodithioateS-ester withN-(2-mercaptoethyl)benzenesulfonamide] treatments were delayed until after bermudagrass initiated spring growth, foliar growth and quality were generally lower than when the treatments were applied to dormant turf. Retardation of early foliar bermudagrass growth by 2,4-D [(2,4-dichlorophenoxy)acetic acid] + mecoprop {2-[(4-chloro-o-tolyl)oxy] propionic acid} + dicamba (3,6-dichloro-o-anisic acid) was generally the same whether applied to dormant or semidormant turf. This combination of herbicides reduced the quality and density of bermudagrass when applied to growing but not to dormant turf. Atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] did not retard bermudagrass growth or affect density whether applied to dormant or semidormant turf, but turf quality was slightly lower when atrazine was applied to semidormant turf.

Response of Weeds in Bermudagrass (Cynodon dactylon) Turf to Tank-Mixed Herbicides

Weed Science ◽  
1983 ◽  
Vol 31 (6) ◽  
pp. 883-888 ◽  
Author(s):  
B. J. Johnson
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Cynodon Dactylon ◽  
Digitaria Sanguinalis ◽  
Anisic Acid ◽  
Dichlorophenoxy Acetic Acid ◽  
Large Crabgrass

Tank mixtures of herbicides for control of emerged winter weeds and preemergence control of large crabgrass [Digitaria sanguinalis(L.) Scop. # DIGSA] were evaluated on bermudagrass [Cynodon dactylon(L.) Pers. ‘Common’ # CYNDA] fairways over a 2-yr period. Glyphosate [N-(phosphonomethyl)glycine] applied at 0.28 kg ai/ha in tank mixtures with DCPA (dimethyl tetrachloroterephthate) at 11 kg ai/ha controlled a higher percentage of parsley-piert (Alchemilla microcarpaBoiss. Reut. # APHMI) than either herbicide alone. When applied for spur weed (Solivaspp.) control, DCPA was antagonistic in the tank mixture with simazine [2-chloro-4,6-bis(ethylamino)-s-txiazine]. During one yr of the 2-yr study period, control of large crabgrass was less in plots treated with combination of DCPA and glyphosate than in plots treated with DCPA alone. Less large crabgrass control was obtained in plots treated with bensulide [O,O-diisopropyl phosphorodithioateS-ester withN-(2-mercaptoethyl)benzenesulfonamide] at 11 kg ai/ha in combinations with either paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) or 2,4-D [(2,4-dichlorophenoxy)acetic acid] plus mecoprop {2-[(4-chloro-o-tolyl)oxy]propionic acid} plus dicamba (3,6-dichloro-o-anisic acid) than when treated only with bensulide.

Response of Common Goldenweed (Isocoma coronopifolia) and Buffelgrass (Cenchrus ciliaris) to Fire and Soil-Applied Herbicides

Weed Science ◽  
1983 ◽  
Vol 31 (3) ◽  
pp. 355-360 ◽  
Author(s):  
H. S. Mayeux ◽  
W. T. Hamilton
Keyword(s):  
Acetic Acid ◽  
Standing Crop ◽  
Canopy Cover ◽  
Cenchrus Ciliaris ◽  
Controlled Burning ◽  
Herbicide Treatments ◽  
Anisic Acid ◽  
Excellent Control ◽  
Dichlorophenoxy Acetic Acid

Controlled burning during winter reduced densities of common goldenweed [Isocoma coronopifolia(Gray) Greene] by 33 to 44% and suppressed canopy cover and height of surviving common goldenweeds for 2 yr. Applied to an unburned infestation, 2,4-D [(2,4-dichlorophenoxy) acetic acid] or dicamba (3,6-dichloro-o-anisic acid) granules only partially controlled common goldenweed at rates of 2 kg/ha or less. Tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea} or picloram (4-amino-3,5,6-trichloropicolinic acid) pellets provided excellent control of common goldenweed if applied at 2 kg/ha during March and at 1 kg/ha if applied after burning in February. The burning pretreatment appeared to synergistically enhance effectiveness of herbicides applied at relatively low rates. Increases in standing crop of buffelgrass (Cenchrus ciliarisL.) following burning were usually small and temporary, but effective herbicide treatments and burn-herbicide combinations increased buffelgrass standing crop by as much as three-fold.

Degradation of Dicamba, Picloram, and Four Phenoxy Herbicides in Soils

Weed Science ◽  
1973 ◽  
Vol 21 (6) ◽  
pp. 556-560 ◽  
Author(s):  
J. D. Altom ◽  
J. F. Stritzke
Keyword(s):  
Acetic Acid ◽  
Linear Regression ◽  
Propionic Acid ◽  
Half Life ◽  
The Other ◽  
Degradation Rates ◽  
Anisic Acid ◽  
Herbicide Concentration ◽  
Phenoxy Herbicides ◽  
Dichlorophenoxy Acetic Acid

The degradation rates of 2,4-D [(2,4-dichlorophenoxy)acetic acid], dichlorprop [2-(2,4-dichlorophenoxy)propionic acid], 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], silvex [2,(2,4,5-trichlorophenoxy)propionic acid], dicamba (3,6-dichloro-o-anisic acid), and picloram (4-amino-3,5,6-trichloropicolinic acid) were determined in three soils. Herbicide breakdown was proportional to herbicide concentration, so half life of the various herbicides was calculated from linear regression of the logarithm transformed residue data. The average half life for 2,4-D, dichlorprop, silvex, 2,4,5-T, dicamba, and picloram were, respectively, 4 days, 10 days, 17 days, 20 days, 25 days, and greater than 100 days. The rate of degradation of 2,4-D was the same in all three soils, but for the other herbicides it was consistently faster in soil removed from under grass vegetation than from under trees.

Chemical Control of Canada Thistle

Weed Science ◽  
1975 ◽  
Vol 23 (2) ◽  
pp. 116-118 ◽  
Author(s):  
A. G. Carson ◽  
J. D. Bandeen
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Chemical Control ◽  
Field Studies ◽  
Cirsium Arvense ◽  
Canada Thistle ◽  
Stages Of Development ◽  
Anisic Acid ◽  
Dichlorophenoxy Acetic Acid

Field studies were conducted to evaluate the effectiveness of one, two, and three annual applications of atrazine [2-chloro-4-(ethylamino) −6-(isopropylamino)-s-triazine], 2,4-D [(2,4-dichlorophenoxy) acetic acid], dicamba (3,6-dichloro-o-anisic acid), and a three way mix of dicamba, mecoprop [2-[(4-chloro-o-tolyl) oxy]propionic acid], and 2,4-D at a ratio of 7:5:20 at different stages of development for the control of Canada thistle [Cirsium arvense(L.) Scop.]. Two consecutive annual applications in all atrazine treatments achieved the same level of control as cultivation every 5 weeks. In the year of the last treatment, Canada thistle was controlled with two or more consecutive annual applications of the hormone-type herbicides (2,4-D, dicamba, and the three way mix); however, in the year following the last treatment, regrowth occurred.

Selective Weed Control in Seedling Cool-Season Grasses

Weed Science ◽  
1970 ◽  
Vol 18 (2) ◽  
pp. 288-291 ◽  
Author(s):  
C. L. Canode ◽  
W. C. Robocker
Keyword(s):  
Acetic Acid ◽  
Weed Control ◽  
Seed Production ◽  
Cool Season ◽  
Grass Seed ◽  
Selective Control ◽  
Anisic Acid ◽  
Grass Establishment ◽  
Dichlorophenoxy Acetic Acid

Seven herbicides were applied for selective weed control on three different seedling stands of five cool-season grasses. The herbicides were evaluated for their influence on weed control, grass establishment, and first crop grass seed production. These experiments indicate that 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) was outstanding in selective control of broadleaf weeds in seedling grass stands. Two other herbicides, 3,6-dichloro-o-anisic acid (dicamba) and 6,7-dihydrodipyrido[1,2-a:2′,1′-c]pyrazinediium ion (diquat) were valuable under most conditions. The remaining herbicides—(2,4-dichlorophenoxy)acetic acid (2,4-D), 2-sec-butyl-4,6-dinitrophenol (dinoseb), 2,3,6-trichlorobenzoic acid (2,3,6-TBA), and 1-butyl-3-(3,4-dichlorophenyl)-1-methylurea (neburon)—were satisfactory for selective weed control under some conditions, but their effects were not uniform for the different species and plantings.

Glyphosate for Weed Control in Dormant Bermudagrass

Weed Science ◽  
1976 ◽  
Vol 24 (1) ◽  
pp. 140-143 ◽  
Author(s):  
B. J. Johnson
Keyword(s):  
Acetic Acid ◽  
Weed Control ◽  
Cynodon Dactylon ◽  
Single Treatment ◽  
Stellaria Media ◽  
Annual Bluegrass ◽  
Combination Treatments ◽  
Anisic Acid ◽  
Winter Annuals ◽  
Dichlorophenoxy Acetic Acid

The control of winter annuals in dormant bermudagrass [Cynodon dactylon(L.) Pers. ‘Common’] has not been consistent with available herbicides. Experiments were conducted to evaluate rates and number of glyphosate [N-(phosphonomethyl)glycine] applications for control of winter annuals growing in dormant bermudagrass. Glyphosate applied as a single treatment at 0.6 kg/ha consistently controlled more parsley-piert (Alchemilla microcorpaBoissier Reuter), corn speedwell (Veronica arvensisL.), and henbit (Lamium amplexicauleL.) than paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) or combination treatments of 2,4-D [(2,4-dichlorophenoxy)acetic acid) + mecoprop 2[(4-chloro-o-tolyl)oxy] propionic acid + dicamba (3,6-dichloro-o-anisic acid). There was no difference between glyphosate and paraquat control of annual bluegrass (Poa annuaL.) and common chickweed [Stellaria media(L.) Cyrillo]. Glyphosate treatments did not injure the bermudagrass the following spring.

scholarly journals Buffalograss Seedling Tolerance to Postemergence Herbicides

HortScience ◽  
1994 ◽  
Vol 29 (10) ◽  
pp. 1156-1157 ◽  
Author(s):  
Jack D. Fry ◽  
Ward S. Upham
Keyword(s):  
Acetic Acid ◽  
Dimethyl Ester ◽  
Pyridinecarboxylic Acid ◽  
Metsulfuron Methyl ◽  
Herbicide Treatments ◽  
Anisic Acid ◽  
Methylarsonic Acid ◽  
Plant Injury ◽  
Dichlorophenoxy Acetic Acid ◽  
Postemergence Herbicides

In 1992 and 1993, 12 postemergence herbicide treatments were applied to field-grown buffalograss [Buchloe dactyloides (Nutt.) Engelm.] seedlings having 1 to 3 leaves and 2 to 4 tillers, respectively. The only herbicide treatments that did not cause plant injury at 1 or 2 weeks after treatment (WAT) or reduce turf coverage 4 or 6 WAT compared to nontreated plots (in 1992 or 1993) were (in kg·ha–1) 0.6 dithiopyr, 0.8 quinclorac, 2.2 MSMA, and 0.8 clorpyralid. Evaluated only in 1993, metsulfuron methyl (0.04 kg·ha–1) also caused no plant injury or reduction in coverage. Fenoxaprop-ethyl (0.2 kg·ha–1) caused severe plant injury and reduced coverage by >95% at 6 WAT. Dicamba reduced coverage by 11% at 6 WAT in 1992 but not 1993. The chemicals (in kg·ha–1) triclopyr (0.6), 2,4-D (0.8), triclopyr (1.1) + 2,4-D (2.8), 2,4-D (3.1) + triclopyr (0.3) + clorpyralid (0.2), and 2,4-D (2.0) + mecoprop (1.1) + dicamba (0.2) caused plant injury at 1 or 2 WAT in 1992 or 1993, but coverage was similar to that of nontreated turf by 6 WAT. Chemical names used: 3,6-dichloro-2-pyridinecarboxylic acid (clorpyralid); 3,6-dichloro-o-anisic acid (dicamba); (+/–)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acid (diclofop); 3,5-pyridinedicarbothioic acid, 2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-S,S-dimethyl ester (dithiopyr); 2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy] propanoate (fenoxaprop-ethyl); 2-(2,4-dichlorophenoxy)propionic acid (mecoprop); methyl 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-amino]carbonyl]amino]sulfonyl]benzoate (metsulfuron methyl); monosodium salt of methylarsonic acid (MSMA); 3,7-dichloro-8-quinolinecarboxylic acid (quinclorac); [(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid (triclopyr); (2,4-dichlorophenoxy) acetic acid (2,4-D).

Sign in / Sign up

Export Citation Format

Share Document