PERFORMANCE OF BROMADIOLONE AS A RODENTICIDE AGAINST RATTUS ARGENTIVENTER

Y.M. LAM

Abstract

Bromadiolone showed very good rodenticidal properties against Rattus argentiventer. The single-dose oral LD₅₀ for males and females were 0.49 mg/kg and 0.59 mg/kg respectively. The median lethal feeding period( LFP₅₀) of 0.001% bromadiolone against males and females were 1.43 days and 1.67 days respectively. The pooled LFP₅₀ of 0.001% bromadiolone against both sexes was 1.55 days and the pooled LFP₉₉ was 4.53 days. Bromadiolone was found to have a single-feed action. In one-day no-choice tests, bromadiolone at 0.005% and 0.01% caused 80% and 100% mortalities in both sexes respectively. The mean days to death for males and females were 7.5 days and 7.9 days respectively. Palatability tests indicated the bromadiolone was palatable up to 0.02 per cent.Bromadiolone at 0.005%- 0.02% could be used in the field for the control of R. argentiventer.

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