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.