Abstract
The effects of frequency of application, initial soil moisture content, rate of water application and soil organic matter content on the accumulation of dimethoate in different soils have been studied in the laboratory. It was found that: residual accumulation of the pesticide increased with frequency of application (even under leaching conditions) increasing the initial soil moisture content resulted in increased loss by leaching and therefore a reduction in the proportion of pesticide retained in the soil increased frequency of water application favours the loss of pesticide from the soil, thereby reducing the amount retained removal of soil organic matter reduces the biological degradation of the pesticide but accelerates the loss by leaching, evaporation or co‐distillation so that retention is reduced. Some measures are suggested for minimizing the accumulation of dimethoate in soils.
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