Herbicidal composition comprising as component A) an isoxazolo[5,4-b]pyridine compound of formula I wherein R 1 is hydrogen, R 2 is cyclopropyl and R 3 is cyclopropyl, or an agriculturally useful salt thereof; and as component B) at least one further herbicide selected from the classes b1) to b15): b1) lipid biosynthesis inhibitors; b2) acetolactate synthase inhibitors; b3) photosynthesis inhibitors; b4) protoporphyrinogen-IX oxidase inhibitors, b5) bleacher herbicides; b6) enolpyruvyl shikimate 3-phosphate synthase inhibitor; b7) glutamine synthetase inhibitors; b8) 7,8-dihydropteroate synthase inhibitor; b9) mitosis inhibitors; b10) inhibitors of the synthesis of very long chain fatty acids; b11) cellulose biosynthesis inhibitors; b12) decoupler herbicides; b13) auxinic herbicides; b14) auxin transport inhibitors; and b15) other herbicides selected from the group consisting of bromobutide, chlorflurenol, chlorflurenol-methyl, (1 RS, 2 SR, 4 SR)-1,4-epoxy- p -menth-2-yl 2-methylbenzyl ether, cumyluron, dalapon, dazomet, difenzoquat, difenzoquat-metilsulfate, dimethipin, DSMA, dymron, endothal and its salts, etobenzanid, flamprop, flamprop-isopropyl, flamprop-methyl, flamprop-M-isopropyl, flamprop-M-methyl, flurenol, flurenol-butyl, flurprimidol, fosamine, fosamine-ammonium, indanofan, maleic hydrazide, mefluidide, metam, methiozolin, methyl azide, methyl bromide, methyldymron, methyl iodide, MSMA, oleic acid, oxaziclomefone, pelargonic acid, pyributicarb, quinoclamine, triaziflam, tridiphane and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol; including their agriculturally acceptable salts; and wherein the relative amount of the isoxazolo[5,4-b]pyridine compound of formula I to the at least one component B is from 250:1 to 1:250. A) an isoxazolo[5,4-b]pyridine compound of formula I wherein R 1 is hydrogen, R 2 is cyclopropyl and R 3 is cyclopropyl, or an agriculturally useful salt thereof; and as component B) at least one further herbicide selected from the classes b1) to b15): b1) lipid biosynthesis inhibitors; b2) acetolactate synthase inhibitors; b3) photosynthesis inhibitors; b4) protoporphyrinogen-IX oxidase inhibitors, b5) bleacher herbicides; b6) enolpyruvyl shikimate 3-phosphate synthase inhibitor; b7) glutamine synthetase inhibitors; b8) 7,8-dihydropteroate synthase inhibitor; b9) mitosis inhibitors; b10) inhibitors of the synthesis of very long chain fatty acids; b11) cellulose biosynthesis inhibitors; b12) decoupler herbicides; b13) auxinic herbicides; b14) auxin transport inhibitors; and b15) other herbicides selected from the group consisting of bromobutide, chlorflurenol, chlorflurenol-methyl, (1 RS, 2 SR, 4 SR)-1,4-epoxy- p -menth-2-yl 2-methylbenzyl ether, cumyluron, dalapon, dazomet, difenzoquat, difenzoquat-metilsulfate, dimethipin, DSMA, dymron, endothal and its salts, etobenzanid, flamprop, flamprop-isopropyl, flamprop-methyl, flamprop-M-isopropyl, flamprop-M-methyl, flurenol, flurenol-butyl, flurprimidol, fosamine, fosamine-ammonium, indanofan, maleic hydrazide, mefluidide, metam, methiozolin, methyl azide, methyl bromide, methyldymron, methyl iodide, MSMA, oleic acid, oxaziclomefone, pelargonic acid, pyributicarb, quinoclamine, triaziflam, tridiphane and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol; including their agriculturally acceptable salts; and wherein the relative amount of the isoxazolo[5,4-b]pyridine compound of formula I to the at least one component B is from 250:1 to 1:250. b1) lipid biosynthesis inhibitors; b2) acetolactate synthase inhibitors; b3) photosynthesis inhibitors; b4) protoporphyrinogen-IX oxidase inhibitors, b5) bleacher herbicides; b6) enolpyruvyl shikimate 3-phosphate synthase inhibitor; b7) glutamine synthetase inhibitors; b8) 7,8-dihydropteroate synthase inhibitor; b9) mitosis inhibitors; b10) inhibitors of the synthesis of very long chain fatty acids; b11) cellulose biosynthesis inhibitors; b12) decoupler herbicides; b13) auxinic herbicides; b14) auxin transport inhibitors; and b15) other herbicides selected from the group consisting of bromobutide, chlorflurenol, chlorflurenol-methyl, (1 RS, 2 SR, 4 SR)-1,4-epoxy- p -menth-2-yl 2-methylbenzyl ether, cumyluron, dalapon, dazomet, difenzoquat, difenzoquat-metilsulfate, dimethipin, DSMA, dymron, endothal and its salts, etobenzanid, flamprop, flamprop-isopropyl, flamprop-methyl, flamprop-M-isopropyl, flamprop-M-methyl, flurenol, flurenol-butyl, flurprimidol, fosamine, fosamine-ammonium, indanofan, maleic hydrazide, mefluidide, metam, methiozolin, methyl azide, methyl bromide, methyldymron, methyl iodide, MSMA, oleic acid, oxaziclomefone, pelargonic acid, pyributicarb, quinoclamine, triaziflam, tridiphane and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol; including their agriculturally acceptable salts;