Dr. Murai Éva szerk.: Parasitologia Hungarica 23. (Budapest, 1990)

Parasit, hung. 23. 1990 A new, modern anticoagulant rodenticide, LANIRAT-B Dr. Dániel BAJOMI and Ágnes KIS-VARGA Rabolna Bio-enviroumental Centre, Budapest, Hungary "A new, modern anticoagulant rodenticide, LANIRAT-B" - Bajomi, D. and Kis-Varga, Á. Parasit. hung, 23: 129-145. ABSTRACT. LANIRAT-B is an up-to-date, ready-to-use rodenticide bait which is highly palatable to both rats and mice. Rats and mice consume sufficient amounts of LANIRAT-B even if their usual poison-free food is also available. The laboratory experiments conducted by us have proved that LANIRAT-B resulted in 100 % mortality even if the animals consumed it only for one day. With LANIRAT-B, there is no need for using higher active ingredient concentrations for mouse killing, as mice consume 2.6 LD^q of the bromadiolone active ingredient even under the least favourable conditions (presence of abundant alternative food, one-day feeding of LANIRAT-B). The ready-to-use bait is highly stable and can be preserved without loss of quality for a long time. The active ingredient bromadiolone is known to be effective also against rodent species which have become tolerant or resistant to first-generation anticoagulant rodenticides (e. g. warfarin). A further advantage of rodenticides containing bromadiolone is that the risk of primary and secondary poisoning of domestic animals is relatively low. LANIRAT-B can become an ideal rodenticide on animal farms, in food products factories and granaries. KEY WORDS. Anticoagulant rodenticide, rat, mouse, mortality rate, LANIRAT-B. Of procedures aimed at the eradication of commensal rodents (rat, mouse), only those utilizing chemical active ingredients promise sufficiently rapid success but only if employed properly (HADLER 1984, HERMANN 1974, MEEHAN 1984). Earlier, chemical preparations of acute effect, i. e. those which gave a rapid result, were used in Hungary. The increase in the number and, first of all, range of rodent eradication programmes has raised the necessity of using more efficacious rodenticides which are less toxic to the environment and can be stored without loss of efficacy for a long time. This situation has led to the introduction of the so-called "firstgeneration" anticoagulant rodenticides. In Hungary these preparations contain warfarin, chlorofacinone, coumachlor and coumatetralyl as active ingredient.