*Directorate of Rice Research, Indian Council of Agricultural Research, Rajendra Nagar, Hyderabad (Andhra Pradesh).
Department of Entomology, Punjab Agricultural University, Ludhiana-141 004, India
Online published on 3 November, 2011.
Following soil application of a granular formulation of phorate @ 1 and 4 kg a.i./ha, its residues were determined in the soil and mustard. In the soil, phorate, underwent rapid transformation to-form phorate sulfoxide and phorate sulfone and the parent compound was not detected beyond 30 days of application even when applied @ 4 kg a.i./ha. Eight weeks after application, phorate residues in the soil disappeared almost completely. Residues in greens of mustard mainly comprised of phorate sulfoxide and phorate sulfone, though phorate, phorate sulfoxide and phorate sulfone were also detected. It is concluded that the application of phorate at the dosage of 1 kg a.i./ha were unlikely to lead to unacceptable residues in the harvested mustard seeds.
