| 摘要 |
<p>A laboratory method of screening candidate water-retentive materials such as cellulosic materials for rodenticidal activity in the field is disclosed, in which the rodents are tested to determine whether or to what extent the water-retentive material has disrupted water transport through the wall of the gut. The method involves examination of the gut (for compaction and bloating) and the caecum (for impaction). Rodenticides which act by interference with water transport through the gut wall, particularly in the caecum (where cellulose is digested in rats) have unique selective toxicity, since the caecum is vestigial in humans, who are not therefore affected by such materials.</p> |
