Nouvelle déclaration d'incident
No de la demande: 2015-3977
Numéro de référence du titulaire d'homologation: 42114
Nom du titulaire (nom légal complet, aucune abbréviation): Bayer CropScience Inc.
Adresse: Suite 200, 160 Quarry Park Blvd SE
Ville: Calgary
État: AB
Pays: Canada
Code postal /Zip: T2C 3G3
Étude scientifique
ARLA No d'homologation 18092 ARLA No de la demande d'homologation EPA No d'homologation.
Nom du produit: DELTAMETHRIN TECHNICAL INSECTICIDE
Inconnu
Inconnu
Titre Stephan Schmitzer
Date 16-JAN-13
Non
Augmentation du risque sanitaire ou environnemental
BCS is submitting new information to PMRA related to deltamethrin technical. BCS has become aware of two studies investigating the acute oral toxicity of deltamethrin technical on honey bees (Schmitzer S., 2013 and Waltersdorfer A., 1996).This information is not necessarily a new adverse effect of the subject chemical, but is rather new information submitted for agencys own review and evaluation.
Non
The 72 hour LD50 reported by Waltersdorfer A., 1996 is much lower than reported in Schmitzers S. However, Schmitzer S., 2013 strictly follows the established OECD 213 guideline while the Waltersdorfer A., 1996 study has major deficiencies. Waltersdorfer A., 1996, provided the test material in a diet paste without solvent rather than in a 50% sucrose solution as is standard protocol. Given the inherently low solubility of deltamethrin (0.2 ppb in water at 20¿¿¿¿C), lack of solvent, and treatment in the form of a diet paste prepared with powdered sugar, honey, and water it is expected that bees were exposed to undissolved deltamethrin. Considering this study does not follow modern testing procedures, the LD50 value is an extrapolation since 50% mortality was not achieved in the study, and bees were proved a diet paste which presumably contained undissolved test material, Bayer CropScience believes the study is unreliable and oral toxicity of deltamethrin to honey bees under laboratory conditions should be based on the Schmitzer S., 2013 study.