Abstract
A new anticoagulant rodenticide, flocoumafen, at a concentration of 0·005% in the bait in 24 h no-choice and 48 h choice laboratory feeding tests was found to cause 100% mortality of the Indian bush rat Golunda ellioti, the Indian gerbil Tatera indica and the soft-furred field rat Rattus meltada. In field trials in sugar cane and wheat, where these species and the Indian mole rat Bandicota bengalensis and Mus spp. were present, about 65% rodent control was obtained with a single treatment with 0·005% flucoumafen bait at the rate of 1 kg/ha. The performance of a single treatment with flocoumafen was comparable with that of 2·4% zinc phosphide, a conventional acute rodenticide. Unlike zinc phosphide, however, two treatments with a 10-day interval with flocoumafen resulted in significantly higher rodent control compared with the single treatment, indicating the superiority of flocoumafen over zinc phosphide in repeat baiting treatments.
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