There are disclosed novel ether compounds of the general formula:
wherein R1, R2 and R3 are each hydrogen or the like; A is a group of the general formula:
B is a group of the general formula:
and X is oxygen or sulfur; and harmful-organism controlling agents containing them as active ingredients.
There are disclosed novel ether compounds of the general formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each hydrogen or the like; A is a group of the general formula: ##STR2## B is a group of the general formula: ##STR3## and X is oxygen or sulfur; and harmful-organism controlling agents containing them as active ingredients.