Resistance to Rodenticides in Wild Rat Populations
Beginning in 1990, rat infestations in northwestern Germany started to intensify despite continuing use of rat poisons. In 2000, Michael Kohn and his colleagues tested wild rat populations around Münster. In five towns, they trapped and tested wild rats for resistance to warfarin and the more recently developed poison bromadiolone. The results are shown in FIGURE 17.6.
Which town had the highest percentage of poisonresistant wild rats?
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