Benzyl phenyl ethers, many of which are new, of the formula IMAGE (I) in which X is IMAGE R1 is H or alkyl, R2 is alkyl, alkenyl, alkynyl, alkylidene, alkenylidene or alkynylidene optionally substituted by OH, alkoxy, a heterocyclic group containing O, S or N, amino, monoalkylamino, dialkylamino or by an alkylene bridge with 5 carbon atoms, R3 each independently is H, alkyl, alkoxy, alkylmercapto, halogen, halogenoalkyl, halogenoalkoxy, halogenoalkylmercapto, NO2, amino, monoalkylamino or dialkylamino, R4 each independently is H, halogen or alkoxy, m is an integer from 1 to 5, and n is an integer from 1 to 4, and acid addition salts thereof, are useful for combatting arthropods, nematodes, fungi and bacteria.
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