# Presentation: 422170

## “Predicting the mobility of pesticides over and through agricultural soils is primarily dependent on two things, how tightly they bind to soils and how long they last.”  
Linker & Weber—NC State University
WIN-PST is a tool developed by NRCS to assess RISK involved with the interaction of known soils and pesticides.
Evaluates the potential for pesticides to move with water and eroded particulate matter

**“****Predicting the mobility of pesticides over and through agricultural soils is primarily dependent on two things, how tightly they bind to soils and how long they last.”  **
**Linker & Weber—NC State University**
- WIN-PST is a tool developed by NRCS to assess RISK involved with the interaction of known soils and pesticides.
- Evaluates the potential for pesticides to move with water and eroded particulate matter

- Considerations in NC Pest Management--2006

## 
Soil organic matter (% OM), clay content (% CL), and pH are major components that determine binding and pesticide mobility in soils

- Soil organic matter (% OM), clay content (% CL), and pH are major components that determine binding and pesticide mobility in soils

- Considerations in NC Pest Management--2006

## The NC Ag Chemicals Manual (Tables 2-2 and 2-3 in the 2005 Edition) gives separates indices on Pesticide Leaching Potential (PLP) for specific active ingredients (ie glyphosate) AND Soil Leaching Potential (SLP) for SE US soils.  Table 2-4 gives a Groundwater Contamination Potential (GWCP) based on cross-reference of these ratings.

- Considerations in NC Pest Management--2006

## WIN-PST gives non-numeric ratings that assess the INTERACTION between pesticides and soils types for leaching, solution runoff and adsorbed runoff
WIN--PST ratings for ILP (leaching potential), ISRP (soil runoff potential), and IARP (adsorbed runoff potential) range from LOW to EXTRA HIGH.....

- WIN-PST gives non-numeric ratings that assess the INTERACTION between pesticides and soils types for leaching, solution runoff and adsorbed runoff
- WIN--PST ratings for ILP (leaching potential), ISRP (soil runoff potential), and IARP (adsorbed runoff potential) range from LOW to EXTRA HIGH.....

- Considerations in NC Pest Management--2006

## ....AND gives those ratings for both human hazard and fish hazard potentials (groundwater and surface water)

- ....AND gives those ratings for both human hazard and fish hazard potentials (groundwater and surface water)

- Considerations in NC Pest Management--2006

## WIN—PST 3 was released in November 2005—CCE Approved!

Many improvements over previous versions....how could you doubt this?  What are these so-called improvements?

- WIN—PST 3 was released in November 2005—CCE Approved!
- Many improvements over previous versions....how could you doubt this?  What are these so-called improvements?

- Considerations in NC Pest Management--2006

## New easier to use interface—modeled after Nutrient Management Software.....just kidding
Brand new “Queue” feature allows users to select and save soils, pesticides and soil/pesticide combinations. 
Users can see interaction ratings real time without having to create a report. 
Reports can be saved as MS Word and Acrobat “pdf” documents for easier printing and management. 
Results can now be exported directly to an MS Excel format for easier incorporation into automated worksheets. 
Takes soils directly from the SSURGO Access Template (SSURGO Version 2.1 format). 

**New easier to use interface—modeled after Nutrient Management Software.....just kidding**
**Brand new “Queue” feature allows users to select and save soils, pesticides and soil/pesticide combinations.**
**Users can see interaction ratings real time without having to create a report. **
**Reports can be saved as MS Word and Acrobat “pdf” documents for easier printing and management. **
**Results can now be exported directly to an MS Excel format for easier incorporation into automated worksheets.**
**Takes soils directly from the SSURGO Access Template** (SSURGO Version 2.1 format).

- Considerations in NC Pest Management--2006

## Believe it or not, there are still some issues to be resolved....

Soils with High Water Tables and High OM% remain troublesome....(especially relevant in Coastal Plain).   Prevalence of OM will help bind pesticides (adsorb) and inhibits leachability

- Believe it or not, there are still some issues to be resolved....
- Soils with High Water Tables and High OM% remain troublesome....(especially relevant in Coastal Plain).   Prevalence of OM will help bind pesticides (adsorb) and inhibits leachability

- Considerations in NC Pest Management--2006

## WIN-PST may overestimate the influence of High Water Table on pesticide movements. These soils are noted with a (w) in WIN-PST. Just because there is a High WT doesn’t mean that a pesticide is going to leach!

In soils that have high OM% (>3%), the high water table may be deactivated in WIN-PST “Select Soils” screen

- WIN-PST may overestimate the influence of High Water Table on pesticide movements. These soils are noted with a (w) in WIN-PST. Just because there is a High WT doesn’t mean that a pesticide is going to leach!
- In soils that have high OM% (>3%), the high water table may be deactivated in WIN-PST “Select Soils” screen

- Considerations in NC Pest Management--2006

## This issue is clarified in the 595 standard (yes, you actually need to read the standard....)

High water table may also be deactivated if site has been drained...there are also other conditions

This has to be manually done in WIN-PST (sorry)—but hazard ratings are adjusted accordingly

- This issue is clarified in the 595 standard (yes, you actually need to read the standard....)
- High water table may also be deactivated if site has been drained...there are also other conditions
- This has to be manually done in WIN-PST (sorry)—but hazard ratings are adjusted accordingly

- Considerations in NC Pest Management--2006

**Notes:**
DO DEMONSTRATION OF WIN-PST AFTER THIS SLIDE

## Most important report is WIN-PST Soil/Pesticide Interaction Loss Potential and Hazard Ratings Report (or the easily remembered WPSPILPHRR)
This report gives you the “bottom line”—pesticide loss potentials and human & fish hazard ratings (ground and surface water)

- Most important report is WIN-PST Soil/Pesticide Interaction Loss Potential and Hazard Ratings Report (or the easily remembered WPSPILPHRR)
- This report gives you the “bottom line”—pesticide loss potentials and human & fish hazard ratings (ground and surface water)

- Considerations in NC Pest Management--2006

## What’s the point of the rating?  

Well, according to standard 595, there are mitigation techniques that can lessen the impact of pesticide loss through any of the “loss pathways” (leaching, solution, or adsorbed)

- What’s the point of the rating?
- Well, according to standard 595, there are mitigation techniques that can lessen the impact of pesticide loss through any of the “loss pathways” (leaching, solution, or adsorbed)

- Considerations in NC Pest Management--2006

## The WIN-PST ratings tell us, according to the 595 standard, how many (IF ANY) mitigation techniques are required.

Examples:  LOW—Additional mitigation practices may not be required   
    EXTRA HIGH—Mitigation techniques may not work without changing pesticide selection

- The WIN-PST ratings tell us, according to the 595 standard, how many (IF ANY) mitigation techniques are required.
- Examples:  LOW—Additional mitigation practices may not be required
-     EXTRA HIGH—Mitigation techniques may not work without changing pesticide selection

- Considerations in NC Pest Management--2006

## I want to rush back and run many WIN-PST scenarios.  How do I get it?

NRCS National Water and Climate Center website:  www.wcc.nrcs.usda.gov/pestmgt/winpst.html

- I want to rush back and run many WIN-PST scenarios.  How do I get it?
- NRCS National Water and Climate Center website:  *www.wcc.nrcs.usda.gov/pestmgt/winpst.html*

- Considerations in NC Pest Management--2006

**Notes:**
THE HOME PAGE HAS DIRECTIONS ON HOW TO GET STARTED!  IT WILL HAVE TO LOAD

## Where do I get soils data for my county?  
FOTG Sec II (LOOK ON YOUR F OR C DRIVES
If not there now, go to the Soil Data Mart and download....
WIN-PST takes soils from SSURGO soils database...I can email you instructions on loading these soils into WIN-PST

- Where do I get soils data for my county?
- FOTG Sec II (LOOK ON YOUR F OR C DRIVES
- If not there now, go to the Soil Data Mart and download....
- WIN-PST takes soils from SSURGO soils database...I can email you instructions on loading these soils into WIN-PST

- Considerations in NC Pest Management--2006