Pesticide use practices and surface water loading in the Zollner Creek Watershed Report to the OPVC

Jeffrey Jenkins, Phillip Janney, and Dan McGrath
Oregon State University Extension

Goals:
1. A better understanding of the relationship between Agronomic and other land use practices and
pesticide surface water loading in Zollner Creek watershed within the Pudding subbasin.
2. Adoption of crop management, IPM practices, and mitigation measures that meet production
goals and result in a reduction in surface water loading of high risk pesticides.
3. A methodology for using the integrated site‐specific and watershed scale environmental fate
models SWAT in developing pesticide surface water load reduction strategies in other Oregon
watersheds.

Below are the objectives that measure the success of methods and procedures in achieving the project
goals.
1. Evaluate the feasibility of using SWAT to describe the relationship between agronomic and other
land use practices and pesticide surface water loading in the Zollner Creek watershed.
2. Use SWAT, vetted by landowners and their advisors, to evaluate alternative crop management,
IPM practices, and mitigation measures with regard to their relative potential to reduce
pesticide surface water loading.
3. Conduct outreach efforts that demonstrates the utility of SWAT in evaluating alternative crop
management, IPM practices, and mitigation measures in reducing surface water loading of high
risk pesticides.
4. Evaluate the transferability of the modeling approach to the implementation of pesticide load
reduction strategies in other Oregon watersheds.
5. Use SWAT to provide assistance to landowners in evaluating site‐specific land use practices to
meet both production goals and watershed‐scale environmental protection goals.

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