Laboratory Evaluation of Anticoagulants Against Bandicota Bengalensis (Gray)

An investigation was carried out at the Animal House cum Rodent Laboratory, Department of Entomology, Assam Agricultural University, Jorhat during 2013–14 to evaluate the efficacy of certain anticoagulant rodenticides against Bandicota bengalensis. In both, choice and no-choice feeding trials the efficacy of brodifacoum (0.005%) was significantly better than flocoumafen (0.005%) and difenacoum (0.005%) but at par with bromadiolone (0.005%). In no-choice feeding trial, 100% mortality was recorded with brodifacoum and bromadiolone within 4–9 days but significantly lower mortality was recorded in flocoumafen (80%) and difenacoum (60%). Difenacoum showed poor palatability as more consumption of plain bait was recorded over poison bait. The poison consumption for all the rodenticides was insignificant between the sexes (male & female) in no choice test; however, it was significant for difenacoum and flocoumafen in choice test. The consumption of poison bait by the test animals of both the sexes under choice test was less in comparison to no-choice test. The post treatment consumption of plain bait was significantly lower in case of brodifacoum and bromadiolone in comparison to flocoumafen and difenacoum. This shows relatively better effectiveness of brodifacoum and bromadiolone.