Insecticidal compositions and methods of combatting insects using substituted imidazoles

An insecticidal composition which comprises an insecticidally effective amount of a compound of the formula ##SPC6##

• in which X is selected from the group consisting of oxygen and sulphur, R.sup.3 is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms, R.sup.4 is selected from the group consisting of alkyl of 1 to 10 carbon atoms and cycloalkyl of 3 to 10 carbon atoms, and R.sup.1 and R.sup.2, together with the nitrogen atom to which they are attached, and R.sup.1 and R.sup.2, together with the nitrogen atom to which they are attached, form a morpholino group optionally containing 1 to 4 methyl substituents attached to carbon atoms of the ring, together with a suitable carrier. The insecticidal compositions are of particular value against insects, e.g., aphids, and against other pests, e.g., acarids.