The Organic Option - Centre d'agriculture biologique du Canada

The Organic Center Critical Issue Report Page
March 2008 Pesticide Dietary Risks 43
Organic pesticide
Conventional alternative
Trade Name LD50 cPAD aPAD PEAS EIU EIU Crop
Permethrin Pounce, Ambush 500 0.05 6.89 Pear
Lambda-cyhalothrin Karate 56 0.001 0.0025 7.6 Pear
AVERAGE CONVENTIONAL 278 0.0255 0.0025 7.245
NOTES:
1. LD50 s are measured in mg/kg of bodyweight and are the dose at which 50% of the experimental animals die after exposure to a chemical. The smaller the number, the more toxic
the pesticide.
2. cPAD is the Chronic Population Adjusted Dose set by the U.S. Environmental Protection Agency. cPAD equals the chronic "Reference Dose" (RfD) for a chemical divided by any
applicable additional safety factor triggered by the Food Quality Protection Act's 10-X provision.
3. aPAD is the Acute Population Adjusted Dose set by the U.S. EPA.
4. EIU is the acronym for Environmental Impact Units derived from the Pesticide Environmental Assessment System (PEAS). EIUs are based on acute and chronic mammalian exposure
and toxicity, and risks to birds, daphnia and honeybees. EIUs reflect relative risk associated with a given pesticide use rate and use pattern. The higher the EIU, the greater the potential
for adverse impacts on non-target organisms.
5. cPADs and aPADs for microbial and biological pesticides approved for organic production have not been set by the U.S. EPA because of the granting of exemptions from the
requirement for tolerances. A default value of 0.1 is used for all untested microbial and biological pesticides approved for organic production.