Factors influencing the herbicidal activity of dimethyl 2,3,5,6-tetrachloroterephthalate by James Raleigh McKinley

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Statementby James Raleigh McKinley.
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Pagination66 leaves, bound :
Number of Pages66
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Open LibraryOL14338190M

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Factors influencing the herbicidal activity of dimethyl 2,3,5,6-tetrachloroterephthalate Public Deposited. Analytics The influence of soil temperature on DCPA toxicity to annual ryegrass was investigated by means of a temperature-controlled water bath in the greenhouse.

DCPA was slightly more toxic at 84°F. and 60°F. temperature levels as Cited by: 4. nitrile (dichlobenil), N,N-dimethyl-2,2-diphenylacetamide (diphen-amid), and dimethyl 2,3,5,6-tetrachloroterephthalate (DCPA). These herbicides had no adverse effects on yield, quality factors, or growth. INTRODUCTION A4 ECHANICAL cultivation does not effiectively control lVl weeds in sweet potato plantings because of the prostrate growth habit.

Inhibition of root development was confined to the areas of the stolon which were in direct contact with dimethyl 2,3,5,6-tetrachloroterephthalate (DCPA).

Placement of the herbicides at various soil depths reduced the number of roots developing below the treatment; however, normal root growth occurred above the treated layer.

The Physiology and Biochemistry of Herbicides Factors influencing the herbicidal activity of dimethyl 2,3,5,6-tetrachloro-terephthalate The importance of shoot entry in the action of herbicides. Soil samples with and without a past history of dimethyl-2,3,5,6-tetrachloroterephthalate (DCPA) treatment were obtained from New York.

Factors influencing the herbicidal activity of dimethyl. Abstract. Since the discovery of their herbicidal potential in the mid’s, the dipyridylium herbicides 1,1’-dimethyl-4,4’-bipyridinium salts (paraquat) and 6,7-dihydrodipyrido[1,2-a:2’, l’- c]pyrazinediium salts (diquat) have been used extensively for control and management of terrestrial and aquatic desiccation, pasture renovation, crop production with limited or.

Herbicidal agents containing the only herbicidal components A) flufenacet (component A), B) pendimethalin (component B) and C) diflufenican (component C); in which the herbicidal components are found with respect to each other in the weight ratio indicated below: (range of component A): (range of component B): (range of component C) (1 - ): (10 - ): (1 - ).

4-(3-Trifluoromethylphenyl)pyridazine is a new series of compounds with bleaching and herbicidal activities. Starting from ethyl 2-(3-trifluoromethylphenyl)acetate, an important intermediate 7 was synthesized in five steps with a moderate total yield of % in a safe and practical way.

Twenty-six novel 3-N-substituted aminomethyl(3-trifluoromethylphenyl)pyridazine derivatives were. However, chlorophyll content sprayed with clathrate was lowest, indicating the strongest herbicidal activity of clathrate.

This result might due to the ability of β-CD to improve the water solubility of cyanazine, thereby increasing the herbicidal activity.

Download: Download high-res image (KB) Download: Download full-size image; Fig. The mode of action of 2-(7-fluorooxo-3,4-dihydro-2H-benzo[b][1,4]oxazinyl)-4,5,6,7-tetrahydro-2H-isoindoline-1,3-diones, including the commercial herbicide flumioxazin, had been identified as inhibition of protoporphyrinogen oxidase (protox).

As part of continuous efforts to search for new herbicides with high efficacy, broad-spectrum activity, Factors influencing the herbicidal activity of dimethyl 2,3,5,6-tetrachloroterephthalate book safety to crops, flumioxazin and its. broad, basic knowledge of factors influencing herbicidal activity could lead to specific principles and practices which might bring about more consistent results or at least an intelligent under standing of the reasons for inadequate control.

The herbicide, DCPA (dimethyl 2,3,5,6-tetrachloroterephthalate). Herbicidal agents containing aclonifen. Herbicidal compositions having an effective amount of aclonifen and the other herbicides pendimethalin and picolinafen.

These herbicidal compositions have an improved application profile. ABSTRACT In pure culture and in soils the addition of 2,3,5,6-tetrachloro- terephthalate (DCPA) had little or no effect upon bacterial growth, and several microorganisms appeared to utilize the herbicide as a carbon source, Methyl-2,3,5,6-tetrachloroterephthalate and 2,3,5,6-tetrachloroterephthalic acid were identified as degrada- tion products, A fungus, Penicillium paraherquei Abe, was.

Abstract. Seven factors are known to influence the fate and behavior of pesticides in soil systems: (1) chemical decomposition, (2) photochemical decomposition, (3) microbial decomposition, (4) volatilization, (5) movement, (6) plant or organism uptake, and (7) adsorption.

Herbicidal activity assays. In order to evaluate the activity of the herbicide (free or associated with the NP), seeds of maize (Z. mays) and mustard (Brassica sp.) were planted in plastic vases ( cm high, with an upper diameter of cm and a lower diameter of cm) containing g of plant substrate (Orgam Biomix).

Ten seeds of. Dimethyl sulfate is a colorless, oily liquid that is slightly soluble in water. (3,4) Dimethyl sulfate has a faint, onion-like odor; the odor threshold has not been established.

(4) The vapor pressure for dimethyl sulfate is mm Hg at 20 °C, and it has a log octanol/water partition coefficient (log K ow) of (1,4) Conversion Factors. EPA2 EPA EPA EPA2 EP A2 EP A2 EP A2 EP A EP A EP A EP A EP A EP.

The Committee took note of the extensive positive genotoxicity data for several members of this group of flavouring agents related to furan. Furan, which is carcinogenic, is known to undergo epoxidation and ring opening to form a reactive 2-ene-1,4-dicarbonyl ingly, concern arises that the observed genotoxicity may be due to formation of a reactive metabolite.

This group is represented by the benzamide, benzoic acid [dimethyl-2,3,5,6-tetrachloroterephthalate (DCPA), dinitroaniline, phosphoramidate, and pyridine chemical family, which act by causing the loss of microtubule formation leading to the obstruction of cell division and elongation as evidenced by the swelling of the root tips.

Factors influencing susceptibility of plants to herbicides Susceptibility often decreases with age or maturity Older plants more difficult to control than younger ones Rosettes controlled but bolted plants are more difficult Mustard and dandelion, any stage Plants growing rapidly are most susceptible Rosette technique (p.

WCG). The major hazards encountered in the use and handling of 3,5-xylidine stem from its toxicologic properties. Toxic by all routes (ie, inhalation, ingestion, and dermal absorption), exposure to this oil may occur from its use as a chemical intermediate for the production of dyes.

Physicochemical factors of the active ingredient such as differential uptake by and translocation within target and non‐target species can contribute to disparate biological activities. In order to improve the agrochemical profile of pesticides, the propesticide approach has.

Content: Synthesis of agrochemicals and agricultural biotechnology entering the 21st century / David A. Hunt, Don R. Baker, Joseph G.

Fenyes, and Gregory S. Basarab --Anomalies and the discovery of the imidazolinone herbicides / Marinus Los --The discovery of the imidazolinone herbicides from the perspective of a discovery chemistry manager / Gerald Berkelhammer --Why are imidazolinones such.

Chapter 4. Dimethyl-Maleic Anhydride, a New Synthesis and a Versatile Use of an Old Compound Chapter 5. Synthesis and Plant Growth Regulator Properties of C-O-Carboxyphenyl Derivatives of Five and Six Membered Heterocycles Chapter 6. Synthesis and Herbicidal Activity of 4-Acyl Pyrazole Derivatives Chapter 7.

An investigation of the interactions of soil microorganisms and several groups of herbicidal compounds, primarily chlorinated derivatives, was made. In pure culture and in soils the addition of 2,3,5,6-tetrachloroterephthalate (DCPA) had little effect upon bacterial growth, and several microorganisms appeared to use the herbicide as a carbon.

EWRS Symposium, "Factors Effecting Herbicidal Activity and Selectivity" (), pp. Langeluddeke et al. "McCutcheon's Emulsifiers and Detergents", International Edition (), p. Chemical Patents Index, Basic Abstracts Journal, Section. Paraquat (trivial name; / ˈ p ær ə k w ɒ t /), or N,N′-dimethyl-4,4′-bipyridinium dichloride (systematic name), also known as Methyl Viologen, is an organic compound with the chemical formula [(C 6 H 7 N) 2]Cl is classified as a viologen, a family of redox-active heterocycles of similar structure.

Paraquat was manufactured by salt is one of the most widely used. Dimethyl sulfide (DMS) or methylthiomethane is an organosulfur compound with the formula (CH 3) 2 S. Dimethyl sulfide is a flammable liquid that boils at 37 °C (99 °F) and has a characteristic disagreeable odor. It is a component of the smell produced from cooking of certain vegetables, notably maize, cabbage, beetroot, and is also an indication of bacterial contamination in malt.

Predicted data is generated using the US Environmental Protection Agency’s EPISuite™. Log Octanol-Water Partition Coef (SRC): Log Kow (KOWWIN v estimate) = Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v): Boiling Pt (deg C): (Adapted Stein & Brown method) Melting Pt (deg C): (Mean or Weighted MP) VP(mm Hg,25 deg C): (Mean VP of Antoine &.

herbicidal activity of Sulfomet™ XP herbicide; cold, dry conditions delay the herbicidal activity. In addition, weeds hardened-off by drought stress are less susceptible to Sulfomet™ XP herbicide.

Moisture is needed to move Sulfomet™ XP herbicide into the soil for preemergence weed control. INVASIVE SPECIES MANAGEMENT. herbicidal activity of Landmark® XP Herbicide; cold, dry conditions delay the herbicidal activity.

In addition, weeds hardened-off by drought stress are less susceptible to Landmark® XP Herbicide. Moisture is needed to move Landmark® XP Herbicide into the soil for preemergence weed control. 5 _book art 6/2/15 PM Page 5. Phoma-like fungi are known as producers of diverse spectrum of secondary metabolites, including phytotoxins.

Our bioassays had shown that extracts of Paraphoma sp. VIZRa pathogen of Cirsium arvense, are phytotoxic. In this study, two phytotoxically active metabolites were isolated from Paraphoma sp.

VIZR liquid and solid cultures and identified as curvulin and phaeosphaeride A. The 2-C-methyl-d-erythritol 4-phosphate (MEP) pathway leads to the synthesis of isopentenyl diphosphate in is a major branch point providing precursors for the synthesis of carotenoids, tocopherols, plastoquinone and the phytyl chain of chlorophylls, as well as.

combinations of dimethyl 2,3,5,6-tetrachloroterephthalate (DCPA) and sodium 2,4-dichlorophenoxy-ethyl sulfate (sesone) have been in progress for several years.

The data presented here were obtained in and Straw-berry (Fragaria sp.) plants of the variety Pocahontas were transplanted and sprayed with herbicides in May, The activities of the herbicidal compositions according to the invention meet the requirements and therefore solve the object of improving the application profile of the herbicidally active compound flufenacet (inter alia provision of more flexible solutions with regard to the application rates required for unchanged to enhanced activity.

Procedure for Preparation of Diphenyl Amino(2-thienyl)methylphosphonates 1–6. The procedure for synthesis of 1–6 was similar to the previously published method [23,24].Thiophenecarboxaldehyde (12 mmol, g) was dissolved in methanol (15 mL) and a solution of an appropriate toluidine or anisidine (12 mmol) in methanol (15 mL) was added.

Herbicide combinations comprising an effective amount of components (A), (B) and (C) wherein (A) denotes one or more herbicides selected from the group of compounds of the formula (I) and salts thereof (B) denotes one or more herbicides selected from the group of the compounds of the formula (II) and their salts (C) denotes at least one compound selected from the group consisting of (C PubMed:Influence of nitrogen fertilizers on the yield and composition of thyme (Thymus vulgaris).

PubMed:[Anti-Candida albicans activity of essential oils including Lemongrass (Cymbopogon citratus) oil and its component, citral].

PubMed:Essential oils from. Dimethyl sulfide (DMS) is a substantial contributor to the aroma of many lager-style beers. Opinion varies on its desirability.

It can be derived in beer from two sources: the thermal decomposition of S-methyl-methionine (SMM) produced in the embryo of barley during germination, or the reduction of dimethyl sulfoxide (DMSO, derived from the breakdown of SMM during the curing of malt) by yeast.

In this study, we evaluated antioxidant, antihyperuricemic, and herbicidal activities of essential oils (EOs) from Piper cubeba Bojer and Piper nigrum L.; two pepper species widely distributed in tropics, and examined their chemical compositions. Dried berries of P. cubeba and P.

nigrum were hydro-distilled to yield essential oil (EO) of and % dry weight, respectively. TABLE OF CONTENTS Section Title Page FOREWORD ill 1 INTRODUCTION Test Methods for Terrestrial and Aquatic Pollutants Test Methods for Airborne Pollutants Test Organism Selection 2 SELECTION OF TEST METHODS Introduction Mechanisms of Toxicant Action Fate of Toxicants in or on Plants Aerial Portions of the Plant Dimethyl sulphide (DMS) is a thioether with a relatively lowboiling point (38°C).

At concentrations below itim factors influencing the levels in malt of these three com pounds are the quantity of SMMin green malt and the kilning schedule employed. Clearly moreSMMsurvives at. The safener (S)dichloroacetyl-2,2-dimethylethyl-1,3-oxazolidine was found to induce the GSH content and GST activity in root and shoot of maize seedlings but the effect of the R form was not reported in these experiments.

As a future prospect, the needs for broad application of the green technology in the sustainable agriculture will.

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