TECHNOLOGY FOCUS - AGRICULTURE - Preferred Composition: The isotropic dispersion additionally comprises: at least one alkyl cellosolve cosolvent; and a predetermined amount of an oil, where the oil is extraneously added. The isotropic dispersion comprises: equal quantities of alkoxylated sorbitan monooleate and vegetable oil alkoxylate; and an isotropic dispersion of immiscible liquids, where the microdomains present within each the immiscible liquid receives and accommodates at least a portion of at least one water soluble herbicidal active ingredient. The agrochemical microemulsion formulation comprises 5-50 wt.% of at least one water-soluble herbicidal salt. Preferred Components: The water soluble herbicidal salt is water soluble salts of acifluorfen, acrolein, amitrole, asulam, benzaclin, bentazon, bialaphos, bromacil, bromoxynil, chloramben, chloroacetic acid, clopyralid, 2,4-dichlorophenoxyacetic acid, 4-(2,4-dichlorophenoxy)butyric acid, dalapon, dicamba, dichlorprop, difenzoquat, diquat, endothall, fenac, fenoxaprop, flamprop, flumiclorac, fluoroglycofen, flupropanate, fomesafen, fosamine, glufosinate, glyphosate, imazameth, imazamethabenz, imazamox, imazapic, imazapyr, imazaquin, imazethapyr, ioxynil, 2-methyl-4-chlorophenoxyacetic acid, 4-(2-methyl-4-chlorophenoxy) butyric acid, mecoprop, methylarsonic acid, naptalam, nonanoic acid, paraquat, picloram, quinclorac, sulfamic acid, 2,3,6-trichlorobenzoic acid, trichloroacetic acid and/or triclopyr. The water soluble herbicidal salt is: acifluorfen sodium in combination with salt of glyphosate; acifluorfen sodium in combination with salt of bentazon; salt of glyphosate with salt of paraquat; a water soluble salt of asulam such as asulam sodium in combination with water soluble salt of at least another herbicide; a water soluble salt of endothall acid in combination with water soluble salt of at least another herbicide; or a water soluble salt of triclopyr in combination with a water soluble salt of at least another herbicide. The water soluble herbicidal salt is fomesafen sodium. Preferred Method: In the method for controlling an undesired weed at a location, a predetermined application rate of the formulation administers 100-2500 g/hectare of fomesafen sodium. The method for controlling an undesired weed at a location comprises applying the formulation to the foliage of crop plants genetically transformed to tolerate fomesafen sodium, and simultaneously applying the formulation to foliage of weeds or undesired plants growing in close proximity to crop plants.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The oil microdomains are constituted by the hydrocarbon portion of the added surfactant system. At least one of the immiscible liquids is water. The second liquid is a predetermined oil i.e. immiscible with water. The sorbitan ester is alkoxylated or ethoxylated. The sorbitan ester is sorbitan monooleate, sorbitan linolate, sorbitan laurate, sorbitan myristate, sorbitan stearate or sorbitan palmitate. The vegetable oil alkoxylate is vegetable oil ethoxylate. The vegetable oil ethoxylate is ethoxylates of palm oil, soybean oil, rapeseed oil, sunflower seed oil, peanut oil, cottonseed oil, palm kernel oil, coconut oil, olive oil or castor oil. The surfactant system comprises sorbitan monooleate ethoxylate in combination with castor oil ethoxylate. The sorbitan ester alkoxylate and vegetable oil alkoxylate are present in a weight ratio of 10:90-90:10. The alkyl cellosolve is methyl cellosolve, ethyl cellosolve or butyl cellosolve. The average diameter of the micro-domains formed by self-aggregation of the second fluid is less than 0.1 mu . ACTIVITY - Herbicide. The herbicidal activity of the formulation (comprising fomesafen sodium (39.50 wt.%), vegetable oil ethoxylate (18.15 wt.%), sorbitan monooleate (14.85 wt.%), oleic acid (2 wt.%), methyl cellosolve (12 wt.%) and water (13.50 wt.%)) was tested using sunflower plants. The results showed that the formulation exhibited herbicidal activity of 93%.    MECHANISM OF ACTION - None given.