1 Concentration and Aquatic Toxicity of RIFA Insecticides and Other Organophosphates in Surface Water March 1999-June 2000 Dave Kim, Johanna Walters, Kean S. Goh August 29, 2000 Irvine, CA Outline • Introduction • Monitoring • Concentration vs toxicity • Urban vs. Nurseries • Irrigation Runoff vs. Storm Runoff • Runoff mitigations • Conclusions The Insecticides • Bifenthrin (Talstar®) • Chlorpyrifos (Dursban®) • Fenoxycarb (Award®) • Hydramethylnon (Amdro®) • Pyriproxyfen (Distance®) • Diazinon Aquatic Toxicity (LC50 ppb) 1.14 1.8 170 Malathion na 400 >325 Pyriproxyfen na 1140 160 Hydramethylnon na 400 1600 Fenoxycarb 0.51 0.96 2600 Diazinon 0.13 1.7 3 Chlorpyrifos na 0.16 0.15 Bifenthrin C. dubia D. magna R. Trout Chemical Newport Bay Watershed • Bee Canyon (el modeno) @ Portola Pkwy • Hines Channel (Hines) • Marshburn (Bordiers) @ Irvine Blvd • San Diego Creek @ Campus Dr. • Bonita Creek @ San Diego Ck • Westcliff Park Channel
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1
Concentration and Aquatic Toxicity of RIFA Insecticides and Other
Organophosphates in Surface Water March 1999-June 2000
Dave Kim, Johanna Walters, Kean S. Goh
August 29, 2000Irvine, CA
Outline
• Introduction • Monitoring • Concentration vs toxicity • Urban vs. Nurseries• Irrigation Runoff vs. Storm Runoff • Runoff mitigations• Conclusions
• Bee Canyon (el modeno) @ Portola Pkwy• Hines Channel (Hines)• Marshburn (Bordiers) @ Irvine Blvd • San Diego Creek @ Campus Dr. • Bonita Creek @ San Diego Ck • Westcliff Park Channel