Laboratory Test of Palatability and Toxicity of Two Rodenticides Against Rattus norvegicus albinus

[Objective] To explore palatability and toxicity of 0.005% bromadiolone bait and 0.005% brodifacoum bait.[Method] Rattus norvegicus albinus rats with the identical origin were divided into bromadiolone group(abbreviated as BL group) and brodifacoum group(abbreviated as BF group).BL group were administrated with bromadiolone bait and nonpoisonous bait,BF group with brodifacoum bait and nonpoisonous bait.Daily consumption of poisonous and nonpoisonous bait was recorded,and activity and death of rats were observed.[Result] BL group rats consumed poisonous bait far more than BF group,with feeding coefficient of 0.005% bromadiolone bait of 1.79 and 0.005% brodifacoum bait being 0.66.Rats in BL group started to die 1 day post-giving-poison,reaching peak time of mortality 3 or 4 days post-givingpoison,and the whole died on the fifth day after giving poison period.Rats in BF group started to die 1 day post-giving-poison,and 0- 2 rats died per day after giving poison period with null on day 7,2 rats on day 6 and 8,and 1 rat on leftover day.All of rats in BF group were poisoned to death 9 days post-giving-poison.[Conlusion]The esults suggest 0.005% bromadiolone bait demonstrates better palatability and toxicity against Rattus norvegicus albinus rats than 0.005% brodifacoum bait.