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… after sprays can cause fenthion to leach out of the soil and still be detectable five months later (Cheke et al. … residues in the air for 64 hours and for 46 days in soil was reported by van der Walt (2000). Recently there was … et al. (2013) found that cyanophos was still present in soil, at concentrations of from 0.009 to 0.169 g.g −1 , 41 …