To clarify the cross sensitivity between the fungicide benomyl and some other pesticides, an animal experiment and a field survey were undertaken.
1. About 20% of female farmers, who had not used benomyl, showed positive reactions to 1% benomyl in patch tests. From the results of patch tests, cross reactions between benomyl and such pesticides as Diazinon, Saturn, Daconil and Z-Bordeaux were considered to occur.
2. The results of guinea pig maximization tests suggested that cross reactions occurred between benomyl and such pesticides as Diazinon, Kitazin P, Daconil and Z-Bordeaux.
It may be concluded that the fungicide benomyl shows contact allergic cross reactions with some other pesticides.