Abstract
A field experiment was conducted to study the changes in the chemical and biochemical attributes of soil quality resulting from a single application of metalaxyl- and mefenoxam-based fungicides applied as their EC and WPC formulations at the commercially recommended application rate under tropical rainforest field conditions. No significant change in soil pH was observed with fungicide application. Microbial activity indices (available P, available N and specific enzymatic systems) were more sensitive indicators of change. Acid and alkaline phosphatase, and β-Glucosidase activities in soil were affected at different levels with application of fungicides. However, use of metalaxyl and mefenoxam is not likely to harm the soil quality, in general. Simple correlations done between physico-chemical and microbial properties did not produce any significant relationship.
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