WINPST 3

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WIN--PST 3

• 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 WeberNC 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

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WIN--PST 3

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

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WIN--PST 3

• 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.

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WIN--PST 3

• 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..

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WIN--PST 3

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

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WIN--PST 3

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

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WIN--PST 3

• New easier to use interfacemodeled 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).

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WINPST 3

• 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

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WIN--PST 3

• 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 doesnt mean that a pesticide
  is going to leach!
• In soils that have high OM (gt3), the high water
  table may be deactivated in WIN-PST Select
  Soils screen

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WIN--PST 3

• 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 drainedthere are also other conditions
• This has to be manually done in WIN-PST
  (sorry)but hazard ratings are adjusted
  accordingly

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WIN--PST 3

• 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 linepesticide
  loss potentials and human fish hazard ratings
  (ground and surface water)

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WIN--PST 3

• Whats 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)

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WIN--PST 3

• The WIN-PST ratings tell us, according to the 595
  standard, how many (IF ANY) mitigation techniques
  are required.
• Examples LOWAdditional mitigation practices
  may not be required
• EXTRA HIGHMitigation techniques may not work
  without changing pesticide selection

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WIN--PST 3

• 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

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WIN--PST 3

• 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 databaseI
  can email you instructions on loading these soils
  into WIN-PST