Bayer Aktiengesellschaft

Hoechst Aktiengesellschaft

Gunter Schmahl

Heinz Mehlhorn

Werner Lindner

Axel Haberkorn

Wolfgang Raether

Manfred Rosner

Horst Taraschewski

A method for controlling fish parasites by administering to fish having such parasites or to a habitat of fish having such parasites an effective amount of at least one substituted 1,2,4-triazinedione of the formula ##STR1## in which R.sup.1 represents optionally substituted aromatic radicals or represents optionally substituted heteroaromatic radicals linked via carbon; X represents O, S, SO, SO.sub.2 or -CH(CN)-; R.sup.2 represents one or more identical or different hydrogen, halogen, nitro, alkyl, alkoxy, halogenoalkyl, or halogenoalkoxy radicals; and R.sup.3 represents hydrogen, optionally substituted alkyl, alkenyl, alkinyl, or aralkyl; or a salt thereof with a base.

Method for controlling fish parasites using triazine dione derivatives

A method of using certain triazine-dione compounds for the control of endo- and ectoparasites of fish and/or insects. The compounds may be combined with aids to form an agent for controlling the endo- or ectoparasites.

Agents directed against parasites of fishes and insects

Substituted 1,2,4-triazinediones of the formula ##STR1## in which R.sup.1 represents an optionally substituted aromatic heteroaromatic radical which is bonded via carbon, X represents O, S, SO, SO.sub.2 or ##STR2## R.sup.2 represents one or more identical or different radicals from the group comprising hydrogen, halogen, nitro, alkyl, alkoxy, halogenoalkyl and halogenalkoxy,

Substituted 1,2,4-triazinediones useful against protozoa in insects

A method of combating protozoa in insects which comprises applying to such insects or to an insect habitat an amount effective therefor of a triazinetrione of the formula ##STR1## in which X is 0 or S,

Agents against protozoa in insects

A method of combating ectoparasites in fish which comprises applying to such fish or to water in which said fish are or will be swimming an ectoparasiticidally effective amount of a triazinetrione of the formula ##STR1## in which X is O or S,

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Bochum, Germany

Gunter Schmahl