Mise à jour d'une déclaration précédente
No de la demande: 2009-1991
Numéro de référence du titulaire d'homologation: 2009Jun DCGA
Nom du titulaire (nom légal complet, aucune abbréviation): Monsanto
Adresse: 800 North Lindbergh Blvd.
Ville: Saint Louis
État: Missouri
Pays: United States of America
Code postal /Zip: 63167
Étude scientifique
ARLA No d'homologation ARLA No de la demande d'homologation EPA No d'homologation.
Nom du produit: Fortress Herbicide
Inconnu
Inconnu
Titre An Oral (Gavage) Dose Range-Finding Prenatal Developmental Toxicity Study of MON 52724 in Rats
Date 19-JUN-09
Non
Nouveau danger pour la santé ou pour l'environnement
DCGA, a minor plant metabolite of dicamba, was administered by oral gavage to five groups of eight impregnated female rats from gestation days 6 to 19, at dose levels of 0, 50, 200, 500, and 1000 mg/kg/day. Five of the eight animals at 1000 mg/kg/day died or were sacrificed in extremis between gestation days 12-19. Maternal body weight, maternal body weight changes, and food consumption were reduced at the 500 and 1,000 mg/kg/day doses. Clinical signs of rales and material observations of findings around the nose, mouth, and urogenital/anogenital areas were noted in the 200, 500, and 1000 mg/kg/day doses. No evidence of maternal toxicity was noted at 50 mg/kg/day. There were no effects of the test substance on litter size, fetal weight, or gross changes in fetal morphology at any dose level. Based on these results and the fact that anticipated exposures to this minor plant metabolite are very low, DCGA residues present no significant dietary risk.
Non
30-NOV-09
Monsanto Company is currently evaluating the potential toxicity of 3,6-dichlorogentisic acid (DCGA), previously identified as a minor metabolite of dicamba in plant metabolism studies. DCGA also occurs as a mixture of glucose conjugates at very low levels (average residues less than 0.03 ppm) in soybeans that have been genetically modified to be tolerant to dicamba. Preliminary results from incomplete studies have come to our attention. Final reports for these studies are expected to be issued by November 2009. We anticipate submitting these reports, as well as other studies to support a new use of dicamba.