Abstract

The fungicides copper oxychloride and thiram (tetramethylthiuram disulphide) were evaluated as repellents against the house rat Rattus rattus and the Indian mole rat Bandicota bengalensis by exposure station and pen tests. Uniform spraying of 1·5 and 4·5% aqueous solutions of copper oxychloride and surface coating of the same concentrations of thiram in peanut oil on 9cm × 9cm × 23cm cardboard cartons was found to reduce significantly the number of visits to the cartons by R. rattus deprived of food for 12 h, but not B. bengalensis. Pen trials in which treated and untreated cartons were exposed to R. rattus for 30 days showed the potential of the fungicides for protecting the cartons and their contents, but under laboratory conditions complete protection was not evident.

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