Aerobic degradation of dichlobenil was studied in a test with one soil over a period of 50 weeks. The study was not considered acceptable because the method that was followed deviated from the standard procedure. No separate traps were used for evaporated dichlobenil and metabolites. This may have resulted in an underestimation of the DT50 value because no difference could be made between metabolite formed in the soil or formed in the trap. Also, the calculated DT50 was outside the range of DT50 values obtained in the other experiments, which supports the conclusion that the results of the study are unreliable. Another aerobic degradation study with three soils is available; it was carried out over a period of 273 days. Dichlobenil degraded under aerobic conditions with calculated DT50 values of 38.9 d, 39.0 d and 43.6 d in clay loam, silt loam and loamy sand soil respectively. 2,6- dichlorobenzamide (BAM) was identified as the major metabolite; the highest percentage formed was 69.41% a.r. (at the end of the study in the clay loam soil).