New incident report
Incident Report Number: 2019-1373
Registrant Reference Number: M-624477-01-1
Registrant Name (Full Legal Name no abbreviations): Bayer CropScience Inc.
Address: Suite 200, 160 Quarry Park Blvd S.E.
City: Calgary
Prov / State: Alberta
Country: Canada
Postal Code: T2C 3G3
Scientific Study
PMRA Registration No. 29657 PMRA Submission No. EPA Registration No.
Product Name: Tembotrione Technical Herbicide
Unknown
Unknown
Title Tembotrione - Honey Bee (Apis mellifera L.) 22 Day Larval Toxicity Test (Repeated Exposure)
Date 26-APR-18
No
New health or environmental hazard
No prior information on Tembotrione toxicity to honey bee larva is available. The Study Report entitled Tembotrione - Honey bee (Apis mellifera L.) 22 day larval toxicity test (repeated exposure) describes the findings from a chronic larvae test following the OECD guidance document 239. The study determined a NOEC level of 79.2 mg a.i./kg of food and an EC50 of 291 mg a.i./kg of food, corresponding to a cumulative NOED of 12.2 ug a.i./larva and an ED50 of 44.8 ug a.i./larva. Effects were reported in the two highest test levels in the study (226 and 643 mg a.i./kg, corresponding to 34.8 and 99.0 ug a.i. per larvae). Notably, the risk assessment passes the Tier I screening with BeeREX for the current application rates of tembotrione in two registered Bayer products, Laudis and Vios G3.
No