Translocation of residual ethoprophos and tricyclazole from soil to spinach

Abstract The dissipation of ethoprophos and tricyclazole in soil their translocation tendency to spinach were investigated. Prior field trials, the analytical method for determination these pesticide residues was optimized validated on spinach. trial conducted under greenhouse conditions two different pretreatment periods with pesticides. After treating pesticides 30 (PBI-30) 60 days (PBI-60) before seeding, samples collected study soil. Spinach harvested from soil, 50% 100% mature collected. initial amounts residue PBI-60 PBI-30 soils 0.21 2.74 mg/kg, respectively, both decreased less than 0.01 mg/kg day harvest. Similar observed (0.87 mg/kg) (0.84 mg/kg), 0.44 0.34 respectively. half-lives calculated as 7.6 4.8 days, while relatively long 36.5 77.0 tricyclazole. According spinach, rate determined. In case ethoprophos, residual amount already rapidly degraded could not be confirmed. On other hand, tricyclazole, it confirmed that 1.19 1.61% transferred results, safe management guidelines suggested considering maximum limit