The invention provides a composition for controlling insects or representatives of the order Acarina, which comprises a synergistic combination of (a) a compound of the formula A (see formula A) (b) cypermethrin； and (c) at least one auxiliary. The composition may be applied to the insects or representatives of the order Acarina, or to their environment. The composition may also be used to treat plant propagation material or the site where it is brought out.
