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biological pesticide
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Coumatetralyl 0.0375% bait Efficacy
The palatability and efficacy of a Racumin bait (paste bait containing 0.0375% coumatetraly

Coumatetralyl 0.0375% bait Efficacy
The palatability and efficacy of a Racumin bait (paste bait containing 0.0375% coumatetralyl) was tested by treating rat infestations in a dogs’ boarding kennel. The trials were conducted according to the BBA guidelines. The bait was packaged in 100 g and 10 g sachets, respectively, and was placed in bait stations or in hidden places. The infestation was assessed by a pre-baiting census using wheat and rolled oats.
The infestations were eliminated within one week. The rats consumed up to 1,000 g bait daily. No consumption was recorded during the further trial and the post-baiting census, respectively. Although sick rats were observed in the dogs pens, no sign of poisoning in the dogs was observed.
The results of this study indicate that the risk of secondary poisoning with coumatetralyl in dogs is very low after one ingestion, but the risk may increase after several successive daily ingestions. Practical experience shows that even in dogs’ boarding kennels rat control is justifiable and effective with an anticoagulant rodenticide like coumatetralyl.
Coumatetralyl was evaluated in the laboratory against Bandicota bengalensis and Rattus rattus. Feeding tests with 0.0375% coumatetralyl baits produced 100% mortality after a single day feeding period in B. bengalensis and after a 10-day period in R. rattus. The anticoagulant bait is less palatable in comparison to plain bait. In the case of R. rattus, LFP50 and LFP98 and their 95% confidence limits were 3.89 (2.62-5.77) days and 11.22 (6.1-20.65) days respectively. Median period of survival and its 95% confidence limits of B. bengalensis and R. rattus were 4.7 (3.85-5.7) days and 11.2 (9.33-13.44) days respectively.

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