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Dithiopyr
Dithiopyr is a preemergent herbicide for crabgrass control in turf and ornamental grasses. It is effective on 45 grassy and broadleaf weeds. Dithiopyr inhibits root growth of susceptible weeds as well as turf grass and thus should be used only on established turf with a well-developed root system. Its duration of efficacy is approximately 4 months, so lawns should not be reseeded during this time frame following application of the chemical. Dithiopyr acts primarily as a preemergent herbicide but can also be used in early postemergent control of crabgrass. It is an ingredient in many products including ''Dimension'' from Dow AgroSciences Dow AgroSciences LLC was a wholly owned subsidiary of the Dow Chemical Company specializing in not only agricultural chemicals such as pesticides, but also seeds and biotechnology solutions. The company was based in Indianapolis, Indian .... Mode of Action Dithiopyr acts as a root growth inhibitor, causing cessation of root elon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dithiopyr Synthesis
Dithiopyr is a preemergent herbicide for crabgrass control in turf and ornamental grasses. It is effective on 45 grassy and broadleaf weeds. Dithiopyr inhibits root growth of susceptible weeds as well as turf grass and thus should be used only on established turf with a well-developed root system. Its duration of efficacy is approximately 4 months, so lawns should not be reseeded during this time frame following application of the chemical. Dithiopyr acts primarily as a preemergent herbicide but can also be used in early postemergent control of crabgrass. It is an ingredient in many products including ''Dimension'' from Dow AgroSciences. Mode of Action Dithiopyr acts as a root growth inhibitor, causing cessation of root elongation and inhibition of mitotic cell division. It inhibits formation of microtubules and spindle organizing centers. Dithiopyr may alter microtubule Microtubules are polymers of tubulin that form part of the cytoskeleton and provide structure and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Preemergent Herbicide
Preemergent herbicides are a form of chemical weed control which prevent germinated weed seedlings from becoming established. In some areas of the world, they are used to prevent crabgrass from appearing in lawns. Preemergent herbicides are applied to lawns in the spring and fall, to prevent the germination of weed seeds. They will not affect any established plant. In the spring, they should be applied when air temperatures reach 65–70 °F for four consecutive days. In the fall, they should be applied when nighttime lows reach 55–60 °F for four consecutive nights. "Weed and feed" products which contain both preemergent herbicide and fertilizer in a single product should not be used on southern lawns or warm-season grasses. If applied when preemergent herbicide is needed, the fertilizer may burn or stress the lawn. If applied after the lawn "green-up", weed seeds will have already germinated and the herbicide will be ineffective. Preemergants do not prevent se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crabgrass
''Digitaria'' is a genus of plants in the grass family native to tropical and warm temperate regions but can occur in tropical, subtropical, and cooler temperate regions as well. Common names include crabgrass, finger-grass, and fonio. They are slender monocotyledonous annual and perennial lawn, pasture, and forage plants; some are often considered lawn pests. ''Digitus'' is the Latin word for "finger", and they are distinguished by the long, finger-like inflorescences they produce. Uses The seeds are edible, most notably those of fonio (''Digitaria exilis'' and ''Digitaria iburua''), ''Digitaria sanguinalis'', as well as ''Digitaria compacta''. They can be toasted, ground into a flour, made into porridge or fermented to make beer. Fonio has been widely used as a staple crop in parts of Africa. It also has decent nutrient qualities as a forage for cattle. Lawns The prevalent species of ''Digitaria'' in North America are large crabgrass (''D. sanguinalis''), sometimes known a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dow AgroSciences
Dow AgroSciences LLC was a wholly owned subsidiary of the Dow Chemical Company specializing in not only agricultural chemicals such as pesticides, but also seeds and biotechnology solutions. The company was based in Indianapolis, Indiana, in the United States. On 31 January 2006, Dow AgroSciences announced that it had received regulatory approval for the world's first plant-cell-produced vaccine against Newcastle disease virus from USDA Center for Veterinary Biologics. Dow AgroSciences operates brand names such as Sentricon, Vikane, Mycogen®, SmartStax®, Enlist™, Pfister Seed®, PhytoGen®, Prairie Brand Seed®, Alforex Seeds®, Profume, Dairyland Seed®, and Brodbeck Seed®. Dow AgroSciences also produces Omega-9 canola and sunflower oils. In 2017, the Dow Chemical Company merged into DowDuPont and in April 2019, the company's parent, Dow Inc. was separated into a public company via a corporate spin-off. The Dow AgroSciences business unit remained with DowDuPont and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microtubule
Microtubules are polymers of tubulin that form part of the cytoskeleton and provide structure and shape to eukaryotic cells. Microtubules can be as long as 50 micrometres, as wide as 23 to 27 nm and have an inner diameter between 11 and 15 nm. They are formed by the polymerization of a dimer of two globular proteins, alpha and beta tubulin into protofilaments that can then associate laterally to form a hollow tube, the microtubule. The most common form of a microtubule consists of 13 protofilaments in the tubular arrangement. Microtubules play an important role in a number of cellular processes. They are involved in maintaining the structure of the cell and, together with microfilaments and intermediate filaments, they form the cytoskeleton. They also make up the internal structure of cilia and flagella. They provide platforms for intracellular transport and are involved in a variety of cellular processes, including the movement of secretory vesicles, organell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Preemergent Herbicides
Preemergent herbicides are a form of chemical weed control which prevent germinated weed seedlings from becoming established. In some areas of the world, they are used to prevent crabgrass from appearing in lawns. Preemergent herbicides are applied to lawns in the spring and fall, to prevent the germination of weed seeds. They will not affect any established plant. In the spring, they should be applied when air temperatures reach 65–70 °F for four consecutive days. In the fall, they should be applied when nighttime lows reach 55–60 °F for four consecutive nights. "Weed and feed" products which contain both preemergent herbicide and fertilizer in a single product should not be used on southern lawns or warm-season grasses. If applied when preemergent herbicide is needed, the fertilizer may burn or stress the lawn. If applied after the lawn "green-up", weed seeds will have already germinated and the herbicide will be ineffective. Preemergants do not prevent see ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyridines
Pyridine is a basic heterocyclic organic compound with the chemical formula . It is structurally related to benzene, with one methine group replaced by a nitrogen atom. It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell. Pyridine is colorless, but older or impure samples can appear yellow, due to the formation of extended, unsaturated polymeric chains, which show significant electrical conductivity. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Historically, pyridine was produced from coal tar. As of 2016, it is synthesized on the scale of about 20,000 tons per year worldwide. Properties Physical properties The molecular electric dipole moment is 2.2 debyes. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organofluorides
Organofluorine chemistry describes the chemistry of the organofluorines, organic compounds that contain the carbon–fluorine bond. Organofluorine compounds find diverse applications ranging from Lipophobicity, oil and hydrophobe, water repellents to pharmaceuticals, refrigerants, and reagents in catalysis. In addition to these applications, some organofluorine compounds are pollutants because of their contributions to ozone depletion, global warming, bioaccumulation, and toxicity. The area of organofluorine chemistry often requires special techniques associated with the handling of fluorinating agents. The carbon–fluorine bond Fluorine has several distinctive differences from all other substituents encountered in organic molecules. As a result, the physical and chemical properties of organofluorines can be distinctive in comparison to other organohalogens. # The carbon–fluorine bond is one of the strongest in organic chemistry (an average bond energy around 480 kJ/molKirsch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trifluoromethyl Compounds
The trifluoromethyl group is a functional group that has the formula -CF3. The naming of is group is derived from the methyl group (which has the formula -CH3), by replacing each hydrogen atom by a fluorine atom. Some common examples are trifluoromethane H–, 1,1,1-trifluoroethane –, and hexafluoroacetone –CO–. Compounds with this group are a subclass of the organofluorines. Properties The trifluoromethyl group has a significant electronegativity that is often described as being intermediate between the electronegativities of fluorine and chlorine. For this reason, trifluoromethyl-substituted compounds are often strong acids, such as trifluoromethanesulfonic acid and trifluoroacetic acid. Conversely, the trifluoromethyl group lowers the basicity of compounds like trifluoroethanol. Uses The trifluoromethyl group occurs in certain pharmaceuticals, drugs, and abiotically synthesized natural fluorocarbon based compounds. The medicinal use of the trifloromethyl group dates from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microtubule Inhibitors
Microtubules are polymers of tubulin that form part of the cytoskeleton and provide structure and shape to eukaryotic cells. Microtubules can be as long as 50 micrometres, as wide as 23 to 27 nm and have an inner diameter between 11 and 15 nm. They are formed by the polymerization of a dimer of two globular proteins, alpha and beta tubulin into protofilaments that can then associate laterally to form a hollow tube, the microtubule. The most common form of a microtubule consists of 13 protofilaments in the tubular arrangement. Microtubules play an important role in a number of cellular processes. They are involved in maintaining the structure of the cell and, together with microfilaments and intermediate filaments, they form the cytoskeleton. They also make up the internal structure of cilia and flagella. They provide platforms for intracellular transport and are involved in a variety of cellular processes, including the movement of secretory vesicles, organelles, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
