TECHNOLOGY FOCUS - AGRICULTURE - Preferred Component: The composition comprises greater than or equal to 20 wt.%, preferably greater than or equal to 50 wt.% clomazone, and 5-50 wt.% alga. The microcapsules have a particle size of 0.5-60 mu m, preferably 1-50 mu m. The microcapsules comprise 2-25 wt.%, preferably 5-15 wt.% polymer. The microcapsules further contain a water immiscible solvent such as methyl ester of fatty acids. The microcapsules are suspended in an aqueous medium. The composition comprises 15-50 wt.% aqueous phase.    TECHNOLOGY FOCUS - BIOLOGY - Preferred Component: The alga is Amphora, Anabaena, Ankistrodesmus, Botryococcus, Chaetoceros, Chlorella, Chlorococcum, Cyclotella, Cylindrotheca, Dunaliella, Emiliana, Euglena, Glossomastix, Haematococcus, Isochrysis, Monochrysis, Monoraphidium, Nannochloris, Nannochloropsis, Navicula, Nephrochloris, Nephroselmis, Nitzschia, Nodularia, Nostoc, Ochromonas, Oocystis, Oscillartoria, Pavlova, Phaeodactylum, Picochloris, Platymonas, Pleurochrysis, Porphyra, Pseudoanabaena, Pyramimonas, Scenedesmus, Stichococcus, Synechococcus, Tetraselmis, Thalassiosira, and/or Trichodesmium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The composition is dried to remove the aqueous phase.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The microcapsules shell comprises polyurea. The polyurea shell is formed by the interfacial polymerization of an isocyanate. The isocyanate is a polyisocyanate. The polyisocyanate is 1,3- and/or 1,4-phenylene diisocyanates, 2,4-, 2,6-tolylene diisocyanates (TDI), crude TDI, 2,4'- 4,4'-diphenyl methane diisocyanate (MDI), crude MDI, 4,4'-diisocyanate biphenyl, 3,3'-dimethyl-4,4'-diisocyanate biphenyl, 3,3'-dimethyl-4,4'-diisocyanate diphenylmethane, naphthylene-1,5-diisocyanate, triphenylmethane-4,4', 4"-triisocyanate, m-and p-isocyanate phenylsulfonyl isocyanate, polyaryl polyisocyanate (PAPI), diphenylmethane-4,4'-diisocyanate (PMDI), polymethylene polyphenyl isocyanates (PMPPI), or their derivatives and prepolymers; or ethylene diisocyanate, hexamethylene diisocyanate (HDI), tetramethylene diisocyanate, dodecamethylene diisocyanate, 1,6,11-undecan triisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, lysine diisocyanate, 2.6-diisocyanale methyl caproate, bis(2-isocyanate ethyl) fumarate, bis(2-isocyanate ethyl) carborate, 2-isocyanate ethyl-2, 6-diisocyanate hexanoate, trimethylhexamethylene diisocyanate (TMDI), dimer acid diisocyanate (DDI), isophorone diisocyanate (IPDI), dicyclohexyl diisocyanate, dicyclohexylmethane diisocyanate (H-MDI), cyclohexylene diisocyanate, hydrogenated tolylene diisocyanate (HTDI), bis(2-isocyanate ethyl)-4-cyclohexene-1,2-dicarboxylate, 2,5- and/or 2,6 norbornane diisocyanate, araliphatic polyisocyanates having 8-15C m- and/or p-xylylene diisocyanate (XDI), alpha -, alpha -, alpha -, alpha -tetramethyl xylylene diisocyanate (TMXDI), ethylene diisocyanate, HDI, tetramethylene diisocyanate, dodecamethylene diisocyanate, 1,6,11-undecan triisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, lysine, diisocyanate, 2,6-diisocyanate methyl caproate, bis(2-isocyanate ethyl) fumarate, bis (2-isocyanate ethyl ) carbonate, 2-isocyanate ethyl-2,8-diisocyanate hexanoate, and/or their derivatives and prepolymers. The polyisocyanate is TMXDI, HDI, HDI derivative (such as HDI trimer or HDI uretdione), Desmodur N3600 (RTM: hexamethylene diisocyanate), XP241C and N3400, IPDI, PMPPI, MDI, PAPI, and/or TDI. The ACD crosslinker is tetrakis (methoxymethyl) glycoluril or an alkylated glycoluril resin. ACTIVITY - Herbicide. No biological data given.    MECHANISM OF ACTION - None given.    EXAMPLE - A Synechocystis algae was pretreated by washing in water, centrifuging to remove water, spray drying, and heating to 50-70 degrees C for 5 hours. A water immiscible phase was prepared by stirring 60 g clomazone, 38 g pretreated Synechocystis algae, 5.5 g polyaryl polyisocyanate, 20 g 1-18C fatty acid methyl ester, and 3 g Powderlink 1174 (RTM: Tetramethoxymethyl Glycoluril). An aqueous phase was prepared by heating 0.6 g Atlox 4813 (RTM: surfactant) in 24.51 g water and 0.14 g citric acid to 50 degrees C; and agitating while slowly adding the water immiscible phase to form a uniform emulsion of the water immiscible phase dispersed uniformly throughout the continuous aqueous phase, upon which interfacial polymerization occurred, producing microcapsules having a particle size of 1-30 mu m. The resulting composition was cured by heating to 50 degrees C for 2 hours, cooled, and filtered.