Studies on residues of phorate on rice plant and subsequent on soil were under taken. Two doses of phorate at 10 Kg ai/ha and 2:0 Kg al/ha were applied: in the soil in the granular from. The samples both soil and plant were taken after 0, 5, 10, 15, 20, 30 and 45 days of application and residue levels were analysed spectrophotometrically. The pesticide reaches non detectable level within 20 days of application, in soil and in case of plant maximum residue was obtained at 5th day of sampling and becomes safe after 30 and 45 days of application for both doses.
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Tamil Nadu Agricultural University
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