A 4-methoxymethyl-2,3,5,6-tetrafluorobenzyl 2,2-dimethyl-3-(2-cyano-3-hydrocarbyloxy-3-oxo-1-propenyl) cyclopropanecarboxylate given by the formula (1): ##STR00001## wherein G represents C1 C4 alkyl or C3 C4 alkenyl, has excellent pests controlling effect.