Ammonium Sulfate Enhancement of Glyphosate and SC-0224 Control of Johnsongrass (Sorghum halepense)

1991 ◽  
Vol 5 (1) ◽  
pp. 18-21 ◽  
Author(s):  
Clay D. Salisbury ◽  
James M. Chandler ◽  
Morris G. Merkle
Keyword(s):  
Ammonium Sulfate ◽  
Weed Control ◽  
Sorghum Halepense ◽  
Initial Control ◽  
Mixed Populations

Ammonium sulfate enhanced the initial control of johnsongrass by glyphosate and SC-0224 applied in the fall or summer. Glyphosate at 0.42 kg ha-1in combination with ammonium sulfate at 3.33 kg ha-1provided levels of fall johnsongrass control and spring regrowth control comparable to glyphosate at 0.84 kg ha-1. Spring applications to mixed populations of seedling and rhizome johnsongrass showed that ammonium sulfate added to glyphosate or SC-0224 afforded little enhancement of herbicide efficacy. Glyphosate or SC-0024 at 0.42 kg ha-1applied in combination with logarithmically decreasing rates of ammonium sulfate demonstrated reduced weed control with ammonium sulfate rates above 9.7 kg ha-1.

HOE-39866 use in Chemical Fallow Systems

1989 ◽  
Vol 3 (2) ◽  
pp. 420-428 ◽  
Author(s):  
Robert E. Blackshaw
Keyword(s):  
Ammonium Sulfate ◽  
Weed Control ◽  
Grass Species ◽  
Canadian Prairies ◽  
Wild Oats ◽  
Fallow Systems ◽  
Green Foxtail ◽  
Initial Control ◽  
Chemical Fallow ◽  
Residual Control

Studies were conducted to determine the usefulness of HOE-39866 (HOE-00661) in chemical fallow systems on the Canadian prairies. HOE-39866 at 0.5 to 1.0 kg ai/ha controlled Russian thistle, kochia, green foxtail, wild oats, and wheat comparable to paraquat, glyphosate, and glyphosate plus the isopropylamine salt of 2,4-D. However, control of barley with HOE-39866 was unacceptable. HOE-39866 was compatible in tank mixtures with ammonium sulfate, paraquat, chlorsulfuron, and metsulfuron. Ammonium sulfate improved weed control when HOE-39866 was applied at 0.25 kg/ha but not at 0.75 kg/ha. Adding paraquat at 0.07 to 0.21 kg ai/ha to HOE-39866 improved control of grass species over HOE-39866 alone. Adding chlorsulfuron and metsulfuron to HOE-39866 provided greater initial control of certain species as well as residual control of many weeds. HOE-39866 alone or in conjunction with other herbicides is an alternative to the herbicides used in chemical fallow systems.

Weed Control in a Conservation Tillage Rotation in the Texas Blacklands

Weed Science ◽  
1987 ◽  
Vol 35 (5) ◽  
pp. 695-699 ◽  
Author(s):  
Steven M. Brown ◽  
James M. Chandler ◽  
John E. Morrison
Keyword(s):  
Control Systems ◽  
Weed Control ◽  
Conservation Tillage ◽  
Grain Sorghum ◽  
Control Measures ◽  
Sorghum Halepense ◽  
Low Intensity ◽  
No Till ◽  
Primary Tillage ◽  
And Control

A field experiment was conducted to evaluate weed control systems in a conservation tillage rotation of grain sorghum [Sorghum bicolor(L.) Moench.] – cotton (Gossypium hirsutumL.) – wheat (Triticum aestivumL.). Herbicide systems included fall and spring/summer inputs of high and low intensity. Tillage regimes were no-till (NT) and reduced-till (RT) systems; the latter included fall primary tillage followed by spring stale seedbed planting. Both tillage systems utilized controlled traffic lanes and wide, raised beds. Effective johnsongrass [Sorghum halepense(L.) Pers. # SORHA] control required intense herbicide inputs at one or both application periods, i.e., in the fall and/or spring/summer. Grain sorghum and cotton yields for the most intense weed control system, which included high inputs in both the fall and spring/summer, were not superior to systems that included high inputs in only one of the two application periods. Seedling johnsongrass emergence occurred before spring planting in RT (but not in NT) in 2 of 3 yr, and control measures were ineffective. After 3 yr, the predominant weeds were johnsongrass and browntop panicum (Panicum fasciculatumSw. # PANFA).

Response of Johnsongrass (Sorghum halepense) and Imidazolinone-Resistant Corn (Zea mays) to AC 263,222

1999 ◽  
Vol 13 (3) ◽  
pp. 484-488 ◽  
Author(s):  
John W. Wilcut ◽  
John S. Richburg ◽  
F. Robert Walls
Keyword(s):  
Zea Mays ◽  
Weed Control ◽  
Untreated Control ◽  
Field Studies ◽  
Sorghum Halepense ◽  
Corn Yield ◽  
Redroot Pigweed ◽  
Herbicide Treatments ◽  
Ac 263,222 ◽  
Large Crabgrass

Field studies were conducted in 1992 and 1993 to evaluate AC 263,222 applied postemergence (POST) alone and as a mixture with atrazine or bentazon for weed control in imidazolinone-resistant corn. Nicosulfuron alone and nicosulfuron plus atrazine were also evaluated. Herbicide treatments were applied following surface-banded applications of two insecticides, carbofuran or terbufos at planting. Crop sensitivity to POST herbicides, corn yield, and weed control was not affected by insecticide treatments. AC 263,222 at 36 and 72 g ai/ha controlled rhizomatous johnsongrass 88 and 99%, respectively, which was equivalent to nicosulfuron applied alone or with atrazine. AC 263,222 at 72 g/ha controlled large crabgrass 99% and redroot pigweed 100%, and this level of control exceeded that obtained with nicosulfuron alone. AC 263,222 at 72 g/ha controlled sicklepod and morningglory species 99 and 98%, respectively. Nicosulfuron alone or with atrazine controlled these two species less than AC 263,222 at 72 g/ha. Addition of bentazon or atrazine to AC 263,222 did not improve control of any species compared with the higher rate of AC 263,222 at 72 g/ha applied alone. Corn yield increased over the untreated control when POST herbicide(s) were applied, but there were no differences in yield among herbicide treatments.

Combined Effect of Trifluralin and MSMA on Johnsongrass Control in Cotton

Weed Science ◽  
1970 ◽  
Vol 18 (1) ◽  
pp. 16-18 ◽  
Author(s):  
Y. Kleifeld
Keyword(s):  
Gossypium Hirsutum ◽  
Weed Control ◽  
Combined Effect ◽  
Sorghum Halepense

Preplanting application of α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin), reduced the number of monosodium methanearsonate (MSMA) applications needed for the control of johnsongrass (Sorghum halepense (L.) Pers.). The combined effect enabled weed control to be completed before cotton (Gossypium hirsutum L.) began to bloom, and hence without causing damage to the crop.

Glyphosate Weed Control Enhancement with Ammonium Sulfate and Commercial Water Conditioning Agents

2009 ◽  
Vol 6 (5) ◽  
pp. 102147 ◽  
Author(s):  
Dallas E. Peterson ◽  
Curtis R. Thompson ◽  
R. Zollinger ◽  
Arlean Rhode ◽  
S. W. Dean
Keyword(s):  
Ammonium Sulfate ◽  
Weed Control ◽  
Water Conditioning

scholarly journals Control de malezas en arroz de temporal con clomazone, propanil y 2,4-D.

2006 ◽  
Vol 10 (2) ◽  
pp. 43 ◽  
Author(s):  
Valentín A. Esqueda
Keyword(s):  
Weed Control ◽  
The State ◽  
Cyperus Rotundus ◽  
Weed Species ◽  
Initial Control ◽  
Rice Yields ◽  
Upland Conditions ◽  
Experimental Plots

Between 1996 and 1997, three experiments were carried out in order to evaluate the effect of the herbicide clomazone, alone and mixed with propanil and 2,4-D on weed control and toxicity to rice cv. Milagro Filipino, growing under upland conditions. All the experiments were established in Los Naranjos, in the Municipality of Tres Valles, in the state of Veracruz. The dominant weed species in the experimental plots were Cyperus iria, Echinochloa colona, Cyperus rotundus, Scleria setuloso-ciliata and Malachra fasciata. Clomazone applied preemergent, efficiently controlled E. colona at 0.72 and 0.96 kg a. i./ha, but its effect was partial and temporary on S. setuloso-ciliata and it had no effect on C. iria and C. rotundus. The mixture of clomazone + propanil + 2,4-D efficiently controlled E. colona and C. iria from 0.60 + 1.44 + 0.24 kg a. i./ha and had a good initial control of C. rotundus, but its effect disappeared 45 to 60 days after the application. Rice yields obtained from clomazone treatments, alone or mixed with propanil and 2,4-D were statistically similar to those of the regional controls.

Control of Johnsongrass Ecotypes

Weed Science ◽  
1971 ◽  
Vol 19 (3) ◽  
pp. 229-233 ◽  
Author(s):  
C. G. McWhorter
Keyword(s):  
United States ◽  
Nitrogen Fertilization ◽  
Field Experiments ◽  
The United States ◽  
Sorghum Halepense ◽  
Nitrogen Levels ◽  
Foreign Countries ◽  
Initial Control ◽  
Better Than

Field experiments were conducted to study the effectiveness of 2,2-dichloropropionic acid (dalapon) for the control of 55 morphologically distinct ecotypes of johnsongrass (Sorghum halepense(L.) Pers.) collected throughout the United States and from several foreign countries. Ecotypes varied widely in their response to dalapon whether collected from Mississippi, from 10 other states, or from eight foreign countries. Initial control of seven ecotypes with dalapon increased 8 to 35% when nitrogen fertilization was increased from 0 to 300 lb/A. Regrowth of surviving plants was more vigorous with increased nitrogen levels so increased fertility reduced final control. Comparative differences in the susceptibility of the seven selected ecotypes to monosodium methanearsonate (MSMA) were not as great as those obtained with dalapon. Varying the rate of nitrogen fertilization had less effect on johnsongrass susceptibility to MSMA than to dalapon. Dalapon controlled sorghum almum (Sorghum almumParodi) better than johnsongrass.

Control and Competitiveness of Johnsongrass (Sorghum halepense) in Cotton (Gossypium hirsutum)

Weed Science ◽  
1981 ◽  
Vol 29 (3) ◽  
pp. 356-359 ◽  
Author(s):  
P. E. Keeley ◽  
R. J. Thullen
Keyword(s):  
Gossypium Hirsutum ◽  
Weed Control ◽  
Field Experiments ◽  
Yield Loss ◽  
Sorghum Halepense ◽  
Cotton Yield ◽  
Yield Losses ◽  
Seed Cotton ◽  
Average Yield ◽  
Labor Costs

Four field experiments conducted over 3 yr indicated that cultivation alone failed to prevent johnsongrass [Sorghum halepense(L.) Pers.] from reaching densities that severely reduced yields of cotton (Gossypium hirsutumL. ‘Acala SJ-2’). Density of johnsongrass in plots cultivated four times and hoed weekly for 8 weeks after emergence was reduced to 1 shoot/m2at harvest compared to 74 shoots/m2for plots that were only cultivated. In addition to a 60% average yield loss of seed cotton, yield losses ranging from 40 to 76%, ginning losses were also greater from cultivated than from hand-weeded plots. Compared to cultivated plots, supplementing cultivation with two postemergence applications of 3.0 kg/ha of DSMA (disodium methanearsonate) increased the average yield of cotton by 20% and reduced perennial johnsongrass densities by 64% at harvest. Although yields were improved by applying DSMA, they averaged 40% less than those of hand-weeded plots. The temporary weed control obtained with DSMA was profitable in terms of the additional lint and seed obtained, but insufficient cotton was produced to pay expenses for producing the crop by any of the methods of weed control. High labor costs for hoeing prevented this treatment from being profitable.

Banana Pepper Response and Annual Weed Control with S-metolachlor and Clomazone

2015 ◽  
Vol 29 (3) ◽  
pp. 544-549 ◽  
Author(s):  
Mohsen Mohseni-Moghadam ◽  
Douglas Doohan
Keyword(s):  
Weed Control ◽  
Field Experiments ◽  
Agricultural Research ◽  
Research Station ◽  
The North ◽  
Crop Injury ◽  
Giant Foxtail ◽  
Late Emergence ◽  
Initial Control ◽  
Common Purslane

Field experiments were conducted at the North Central Agricultural Research Station in Fremont, OH, in 2006 and 2007, to evaluate tolerance of banana pepper to S-metolachlor and clomazone, and the efficacy of these herbicides on green and giant foxtail, common lambsquarters, and common purslane. The crop was machine-transplanted in late spring of each year. Pretransplant (PRETP) herbicide treatments included two S-metolachlor rates (534 and 1,070 g ai ha−1), two clomazone rates (560 and 1,120 g ai ha−1), and four tank mixes of S-metolachlor plus clomazone (534 + 560 g ha−1, 1,070 + 560 g ha−1, 534 + 1,120 g ha−1, and 1,070 + 1,120 g ha−1). Crop injury and weed control data were collected at 2 and 4 wk after treatment (WAT). The crop was harvested two times from August to September. Minor crop injury was observed at 2 WAT only in 2006 and in plots treated with S-metolachlor, alone or in combination with clomazone. In 2007, slight crop injury at 6 WAT in most herbicide-treated plots was mostly related to weeds that grew regardless of herbicide treatment. In general, S-metolachlor provided less weed control than did clomazone or tank mixes of S-metolachlor plus clomazone. Clomazone did not reduce yield of banana pepper. Registration of clomazone would provide banana pepper growers an opportunity to control weeds caused by late emergence or poor initial control following a burndown herbicide application.

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