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By far the most frequently used products are formulations for mixing with water then applying as sprays. Water miscible, older formulations include: EC Emulsifiable concentrate; WP Wettable powder; SL Soluble (liquid) concentrate; SP Soluble powder; Newer, non-powdery formulations with reduced or no use of hazardous solvents and improved ...
One major complication to the use of herbicides for weed control is the ability of plants to evolve herbicide resistance, rendering the herbicides ineffective against target plants. Out of 31 known herbicide modes of action, weeds have evolved resistance to 21. 268 plant species are known to have evolved herbicide resistance at least once. [59]
Dicamba is a selective and systemic herbicide that kills annual and perennial broadleaf weeds. [10] Its primary commercial applications are weed control for grain crops and turf areas. It is also used to control brush and bracken in pastures, as well as controlling legumes and cacti .
When used as a conventional herbicide for weed control, diquat must be applied after the weeds have emerged since it is only effective on contact with green tissue. In this use it is fast-acting in sunlight and more effective on broadleaved weeds than grasses. [17] [18] Mixing of diquat with other herbicides is also feasible. [12]
Volume percent is the concentration of a certain solute, measured by volume, in a solution.It has as a denominator the volume of the mixture itself, as usual for expressions of concentration, [2] rather than the total of all the individual components’ volumes prior to mixing:
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2-Methyl-4-chlorophenoxybutyric acid is an herbicide produced from butyrolactone. Butyrolactone, with its wide liquid range, chemical stability, and high dielectric constant, is used in electrolytic capacitors as the organic solvent. It is frequently mixed with a small ratio of ethylene glycol, "9:1" being common, to vary internal resistivity.