Abstract
Abstract Disulfoton was evaluated as a control agent against the lettuce aphid, Nasonovia ribisnigri (Mosley). Band treatments at 0.9 and 1.9 kg a.i./ha and soil drench treatments at 1.1 and 2.3 kg a.i./ha applied to an organic muck soil at seeding were ineffective whereas foliar sprays at 1.0, 2.0 or 4.0 kg a.i./ha gave effective control. Disulfoton oxidized rapidly in lettuce to its sulfoxide (DSO), sulfone (DSO2), oxygen analogue sulfoxide (DOASO) and oxygen analogue sulfone (DOASO2). The oxygen analogue (DOA) was never detected. When applied as a band treatment or a soil drench, considerable amounts of residues of disulfoton and its toxic metabolites were detected in young plants by the first sampling date 22 days after seeding, but then decreased to less than 0.1 ppm after 36 days. When applied as a foliar spray total residues persisted much longer. They were, however, all below the tolerance of 0.5 ppm in marketable heads.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Environmental Science and Health, Part B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
