Biodegradation of Malathion Using Pseudomonas stutzeri(MTCC 2643)

Abstract

<jats:p>Pesticides are applied in agricultural fields for controlling pest population to achieve crop protection. But they cause damage to nontarget organisms and affect the quality of environment including water, air and soil. The present study has been designed to test the efficiency of Pseudomonas stutzerion the degradation of malathion. The bacterial strain was subjected to 50, 100, 150 and 200 ppm of malathion in minimal broth for 30 hours and changes in orthophosphate levels, pH and turbidity were monitored for every six hours. Efficiency of free and immobilized cells were compared for orthophosphate release. Influence of different sugars on degradation was also compared. Degradation of 150 ppm of malathion was confirmed with UV-Visible spectrophotometric analysis and HPLC analysis. The data were subjected to two way analysis of variance and the results are discussed.</jats:p>

Organochlorine and organophosphate pesticides in soils of a vulnerable area from an aquifer in Northern Colombia

“…Organophosphates: Malathion (in 42.85% of the samples) and chlorpyrifos (in 33.33% of the samples), are short-lived pesticides in the soil due to their proven biodegradability (Vaishali et al, 2020) which suggests a low risk of reaching aquifers; however, their presence has been reported in these water sources (Duttagupta et al, 2020;Vasseghian et al, 2022). For Endrincetone, despite being distributed throughout the southern zone of the Morroa aquifer, more attention is required on the potential risk that it poses to the councils of Sampues and Corozal.…”