Persistence of Chlorpyrifos in Soil Irrigated with Saline Water

The persistence of chlorpyrifos in soil irrigated with graded salinity levels (3.11, 5.90, 10.80 and 19.80 dSm⁻¹) was studied under field capacity moisture regime. Chlorpyrifos disappeared faster in soil treated with normal irrigation water (0.03 dSm⁻¹) than in soil treated with other irrigation waters of varying salinity levels. Continuous use of saline irrigation water did not influence the pH of soil, whereas the electrical conductivity increased linearly with increased levels of salinity in irrigation water.