Substituted benzodioxoles of the formula: ##EQU1## wherein R.sup.1 and R.sup.2 are hydrogen or alkyl of 1 to 6 carbon atoms or together with the linking carbon atom form a cycloalkane or cycloalkene ring of 5 to 7 carbon atoms; R.sup.3 is hydrogen, alkyl of 1 to 4 carbon atoms or acyl; R.sup.4 is alkyl of up to 4 carbon atoms, alkenyl of up to 4 carbon atoms or alkynyl of up to 4 carbon atoms; and R.sup.5, r.sup.6 and R.sup.7 are hydrogen, halogen or alkyl of 1 to 4 carbon atoms Are valuable pesticides, particularly insecticides.