scholarly journals Overcoming Hard Water Antagonistic to Glyphosate or Imazethapyr with Water Conditioners

2014 ◽  
Vol 6 (2) ◽  
pp. 244-249
Author(s):  
Akbar ALIVERDI ◽  
Ali GANBARI ◽  
Mohammad-Hassan RASHED MOHASSEL ◽  
Mehdi NASSIRI-MAHALLATI ◽  
Eskandar ZAND
Keyword(s):  
Magnetic Field ◽  
Citric Acid ◽  
Ammonium Nitrate ◽  
Ammonium Sulfate ◽  
Potassium Phosphate ◽  
Hard Water ◽  
Weak Acid ◽  
Distilled Water ◽  
Water Conditioning ◽  
Acid Herbicides

Carrier water quality may affect the activity of weak acid herbicides when concentrations of some cations are high. A dose-response experiment on glyphosate and imazethapyr activity, which were carried by the carrier types of distilled water and hard water, against jimsonweed were conducted to compare the water conditioning chemicals ammonium sulfate, ammonium nitrate, citric acid and potassium phosphate, with magnetized carrier as a new method. A magnetic field of 0.7 Tesla was applied to prepare the magnetized carrier. With the exception of potassium phosphate with imazethapyr, the activity of glyphosate and imazethapyr was significantly increased in the presence of the water conditioning methods when distilled water was used as the carrier. Ammonium sulfate was the most effective method. The activity of both herbicides was decreased when applied with hard water carrier. Potassium phosphate was not effective at reducing the antagonism of cations in the hard water carrier. In glyphosate, the performance of water conditioning methods in softening hard water carrier could be ranked as follows: ammonium sulfate (2.52-fold) > magnetized carrier (2.12-fold) ≥ citric acid (1.64-fold) ≥ ammonium nitrate (1.39-fold) > potassium phosphate (0.96-fold). In imazethapyr, this order was as follows: ammonium sulfate (2.99-fold) > ammonium nitrate (2.66-fold) > magnetized carrier (1.81-fold) ≥ citric acid (1.64-fold) > potassium phosphate (1.10-fold).

Weed control by 2,4-D dimethylamine depends on mixture water hardness and adjuvant inclusion but not spray solution storage time

2020 ◽  
Vol 34 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Geoffrey P. Schortgen ◽  
Aaron J. Patton
Keyword(s):  
Weed Control ◽  
Storage Time ◽  
Water Hardness ◽  
Hard Water ◽  
Quality Parameters ◽  
Weak Acid ◽  
Hardness Level ◽  
Spray Solution ◽  
Water Conditioning ◽  
Acid Herbicides

AbstractHerbicides are an important tool in managing weeds in turf and agricultural production. One of the earliest selective herbicides, 2,4-D, is a weak acid herbicide used to control broadleaf weeds. Water-quality parameters, such as pH and hardness, influence the efficacy of weak acid herbicides. Greenhouse experiments were conducted to evaluate how varying water hardness level, spray solution storage time, and adjuvant inclusion affected broadleaf weed control by 2,4-D dimethylamine. The first experiment evaluated a range of water-hardness levels (from 0 to 600 mg calcium carbonate [CaCO3] L−1) on efficacy of 2,4-D dimethylamine applied at 1.60 kg ae ha−1 for dandelion and horseweed control. A second experiment evaluated dandelion control from spray solutions prepared 0, 1, 4, 24, and 72 h before application. Dandelion and horseweed control by 2,4-D dimethylamine was reduced when the CaCO3 level in water was at least 422 or at least 390 mg L−1, respectively. Hard-water antagonism was overcome by the addition of 20 g L−1 ammonium sulfate (AMS) into the mixture. When AMS was included in spray mixtures, no differences were observed at 600 mg CaCO3 L−1, compared with distilled water. Spray solution storage time did not influence dandelion control, regardless of water-hardness level or adjuvant inclusion. To prevent antagonism, applicators should use a water-conditioning agent such as AMS when applying 2,4-D dimethylamine in hard water.

Effect of Hard Water and Ammonium Sulfate on Weak Acid Herbicide Activity

2011 ◽  
pp. 115-115-14
Author(s):  
Richard K. Zollinger ◽  
John D. Nalewaja ◽  
Dallas E. Peterson ◽  
Bryan G. Young
Keyword(s):  
Ammonium Sulfate ◽  
Hard Water ◽  
Weak Acid ◽  
Herbicide Activity

High-Aspect-Ratio Titanium Oxide Nanotubes Anodized in KH2PO4/NH4F/Citric Acid Electrolytes

2007 ◽  
Vol 544-545 ◽  
pp. 67-70
Author(s):  
Seong Je Cho ◽  
Jong Oh Kim ◽  
Dae Jin Yang ◽  
Won Youl Choi
Keyword(s):  
Citric Acid ◽  
Titanium Oxide ◽  
Dissociation Constants ◽  
Water Solution ◽  
Potassium Phosphate ◽  
Weak Acid ◽  
Anodization Time ◽  
Step Voltage ◽  
Titanium Oxide Nanotubes ◽  
Photocatalytic Application

Titanium of 99.7% purity was anodized in 1M potassium phosphate monobasic (KH2PO4) water solution with 0.15M NH4F. Titanium oxide nanotubes were fabricated at anodization potential of 20 V and 4.64 pH. To control the pH of the solution, we have added weak acid such as citric acid because it has three dissociation constants (pKa) of 3.09, 4.75, and 5.41. Citric acid was very useful to control the pH of the 1M KH2PO4 water electrolyte solution within 3 to 5. The diameter and length of the titanium oxide nanotubes were independent on anodization time. The diameter of 120 nm and length of 2.8 μm at anodization time of 5 hrs were observed by field emission scanning electron microscope (FESEM). Undesired thin oxide layer blocking the top of titanium oxide nanotubes was wiped out by increasing the anodization potential with the multi step voltage by 1 V reached to 25 V. The titanium oxide nanotubes having a very large surface area are very attractive for the battery, gas sensor, photocatalytic application, and biomaterials.

scholarly journals Effects of NaOCl or Combination of NaOCl and Various Acids on Dentin Surface Morphology: A SEM Study

2014 ◽  
Vol 18 (1) ◽  
pp. 17-23
Author(s):  
Kağan Gökçe ◽  
Yasemin Benderli ◽  
Mağrur Kazak
Keyword(s):  
Citric Acid ◽  
Phosphoric Acid ◽  
Ferric Chloride ◽  
Maleic Acid ◽  
Morphological Changes ◽  
Weak Acid ◽  
Distilled Water ◽  
Third Molars ◽  
Sem Study ◽  
Group 5

Abstract The aim of this study was to evaluate by SEM morphological changes of dentin surfaces under the use of 5% NaOCl before applying different acids for etching. In the study, dentin surfaces were prepared from the middle third of 20 non-carious human third molars. Samples were divided into 2 groups with 3 subgroups each. In the first group, no application was performed on dentin surfaces. In the second group, 5% NaOCl was applied for 60 seconds on the dentin surfaces then rinsed with distilled water for 5 seconds. In all of the subgroups, dentin surfaces were etched by different conditioning agents for 15 seconds then rinsed for 30 seconds. After surface applications, all of the specimens were placed in distilled water. Morphological changes of dentin surfaces were determined by SEM. The results were evaluated by the scoring system based on Brannström et al. In the NaOCl treated groups, scores were as follows: The score of dentin without NaOCl treatment was 0, while it was 4 after phosphoric acid application, 3 after only citric acid-ferric chloride, and 1 after only maleic acid application. In the group where only NaOCl was applied, the score was not exactly 1 but slightly less. The score for NaOCl with phosphoric acid was 4, NaOCl with citric acid-ferric chloride was 3, and NaOCl with maleic acid was 2. Weak acid was found more effective on NaOCl treated dentin surfaces when compared with non-treated dentin surfaces.

Nutrient Effects on Parasitism and Germination of Egyptian Broomrape (Orobanche aegyptiaca)

1992 ◽  
Vol 6 (2) ◽  
pp. 269-275 ◽  
Author(s):  
Rakesh Jain ◽  
Chester L. Foy
Keyword(s):  
Ammonium Nitrate ◽  
Laboratory Experiments ◽  
Potassium Phosphate ◽  
Ammonium Phosphate ◽  
Distilled Water ◽  
Tomato Plants ◽  
Nitrogenous Compounds ◽  
Nutrient Effects ◽  
Potting Media ◽  
Stimulation Of

The influence of various nutrients on parasitism of tomato plants by Egyptian broomrape and on stimulation of broomrape seed germination by strigol analogs was investigated in greenhouse and laboratory experiments. Parasitism occurred most readily in potting media low in fertility. Addition of nitrogenous compounds to potting media resulted in inhibition of broomrape parasitism. Ammonium nitrate with potassium phosphate or ammonium phosphate alone was most effective in reducing parasitism and enhancing growth of tomato plants. In the laboratory, strigol analogs induced 55% germination in broomrape seeds preconditioned in distilled water. Seeds preconditioned in distilled water or various salt solutions, but not treated with strigol analogs, showed 18% germination. GR 24 (5 μM) induced higher germination in seeds preconditioned in 10 mM ammonium nitrate, with or without potassium phosphate, compared with seeds preconditioned in sodium chloride. Preconditioning of seeds in sodium nitrate (10 mM) and treating with GR 24 stimulated, whereas preconditioning of seeds in ammonium salts (1 mM ammonium sulfate or 10 mM urea) and treating with GR 24 inhibited germination significantly.

Effect of Hard Water and Ammonium Sulfate on Weak Acid Herbicide Activity

2010 ◽  
Vol 7 (6) ◽  
pp. 102869 ◽  
Author(s):  
Richard K. Zollinger ◽  
John D. Nalewaja ◽  
Dallas E. Peterson ◽  
Bryan G. Young ◽  
A. D. Lindsay ◽  
...  
Keyword(s):  
Ammonium Sulfate ◽  
Hard Water ◽  
Weak Acid ◽  
Herbicide Activity

The effect of hard water, spray solution storage time, and ammonium sulfate on glyphosate efficacy and yield of glyphosate-resistant corn

2014 ◽  
Vol 94 (8) ◽  
pp. 1401-1405 ◽  
Author(s):  
K. J. Mahoney ◽  
R. E. Nurse ◽  
P. H. Sikkema
Keyword(s):  
Ammonium Sulfate ◽  
Storage Time ◽  
Water Hardness ◽  
Hard Water ◽  
Corn Yield ◽  
Distilled Water ◽  
Water Spray ◽  
Above Ground Biomass ◽  
Common Lambsquarters ◽  
Spray Solution

Mahoney, K. J., Nurse, R. E. and Sikkema, P. H. 2014. The effect of hard water, spray solution storage time, and ammonium sulfate on glyphosate efficacy and yield of glyphosate-resistant corn. Can. J. Plant Sci. 94: 1401–1405. Effects of ammonium sulfate (AMS) on reduced glyphosate rates are well documented; however, these rates are not used by farmers. Studies in 2011 and 2012 determined the effects of AMS and hard water on glyphosate applied at a field rate. AMS (0 or 2.5 L ha−1) and glyphosate (900 g a.e. ha−1) were added to distilled or hard water carriers. Glyphosate plus AMS, in either distilled or hard water, did not usually affect velvetleaf, pigweed species, common ragweed, common lambsquarters and large crabgrass above-ground biomass and density 8 wk after treatment (WAT); however, velvetleaf biomass was reduced with the addition of AMS to glyphosate. Compared with the weedy control 8 WAT, glyphosate plus AMS reduced velvetleaf biomass by 93%, while treatments with no AMS reduced biomass by 77%. In distilled water, 4.8 common lambsquarters plants m−2 remained compared with 7.8 plants m−2 with glyphosate in hard water. For corn yield, an AMS×water hardness interaction was detected; however, no differences were observed among the treatment combinations and the addition of AMS to glyphosate did not affect yield. Therefore, advocating adding AMS to spray solutions containing glyphosate, especially when a labeled rate is used, should be called into question.

The Influence of Hard Water on 2,4-D Formulations for the Control of Dandelion

2020 ◽  
pp. 1-31
Author(s):  
Geoffrey P. Schortgen ◽  
Aaron J. Patton
Keyword(s):  
Cropping Systems ◽  
Hard Water ◽  
Water Soluble ◽  
Soluble Salt ◽  
Synthetic Auxin ◽  
Auxin Herbicides ◽  
Acid Herbicides

The herbicide 2,4-D is used in a variety of cropping systems, especially in grasses since it is a selective postemergence broadleaf herbicide. However, the most common formulation (2,4-D dimethylamine) is antagonized when mixed in hard water. The objective of this research was to determine which formulations of 2,4-D or premixes of various formulations of synthetic auxin herbicides are subject to hard water antagonism. Formulations surveyed for hard water antagonism in the first experiment included 2,4-D dimethylamine, 2,4-D diethanolamine, 2,4-D monomethylamine, 2,4-D isopropylamine salt, 2,4-D choline salt, 2,4-D isooctyl ester, and 2,4-D ethylhexyl ester. Synthetic auxin formulation types in the second experiment included water-soluble, emulsifiable concentrates and emulsion-in-water. All formulations were mixed with both soft and hard water (600 mg CaCO3 L-1) and applied to dandelions to determine if antagonism occurred in hard water. Water-soluble (amine and choline) 2,4-D formulations were antagonized by hard water, but water-insoluble (ester) 2,4-D formulations were not antagonized. Similar results were found by formulation type with water-soluble synthetic auxin premixes antagonized but emulsifiable concentrates not antagonized. Further, water-soluble salt formulations were not antagonized when formulated in premixes with other synthetic auxin herbicides as an emulsion-in-water. This research demonstrates that all 2,4-D water-soluble formulations and water-soluble premixes with phenoxycarboxylic acid herbicides are subject to hard water antagonism. Formulations of 2,4-D containing emulsifying agents protect against antagonism by the water-insoluble nature of ingredients in their formulation.

Internal mixing of ammonium nitrate and ammonium sulfate

2000 ◽  
Vol 31 ◽  
pp. 899-900
Author(s):  
Harry M. Ten Brink ◽  
Pauline Dougle ◽  
Arja Even
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulfate ◽  
Internal Mixing
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