Residues of glyphosate and its metabolite AMPA in strawberry fruit following spot and wiper applications

Cessna, Allan J.; Cain, Nancy P.

doi:10.4141/cjps92-168

Cited by 10 publications

(1 citation statement)

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“…Plants have been reported not to metabolise glyphosate. However, glyphosate and AMPA residues were detected in cell cultures of soybean,11 in strawberry plants and fruits12 and in upper crown foliage in forests 13. No published information is available of glyphosate and AMPA residues in glyphosate‐resistant (RR) soybean crops.…”

Section: Introductionmentioning

confidence: 99%

Monitoring glyphosate residues in transgenic glyphosate‐resistant soybean

Arregui

Lenardón

Sánchez

et al. 2003

Pest Management Science

150

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The availability of Roundup Ready (RR) varieties of soybean has increased the use of glyphosate for weed control in Argentina. Glyphosate [(N-phosphonomethyl)glycine] is employed for the eradication of previous crop vegetation and for weed control during the soybean growing cycle. Its action is effective, and low environmental impact has been reported so far. No residues have been observed in soil or water, either of glyphosate or its metabolite, AMPA (aminomethylphosphonic acid). The objective of this work was to monitor glyphosate and AMPA residues in soybean plants and grains in field crops in Santa Fe Province, Argentina. Five sites were monitored in 1997, 1998 and 1999. Individual soybean plants were sampled from emergence to harvest, dried and ground. Analysis consisted in residue extraction with organic solvents and buffers, agitation, centrifugation, clean-up and HPLC with UV detection. In soybean leaves and stems, glyphosate residues ranged from 1.9 to 4.4 mg kg(-1) and from 0.1 to 1.8 mg kg(-1) in grains. Higher concentrations were detected when glyphosate was sprayed several times during the crop cycle, and when treatments approached the flowering stage. AMPA residues were also detected in leaves and in grains, indicating metabolism of the herbicide.

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Section: Introductionmentioning

confidence: 99%