Contaminated soil amendments
Download
1 / 17

Contaminated soil amendments - PowerPoint PPT Presentation


  • 116 Views
  • Uploaded on

Contaminated soil amendments. Cecil Tharp, Montana State University Pesticide Education Program. Be aware of the various modes of pesticide movement into non-target areas: Read Environmental and Precautionary Statements!. Be Aware of Drift Grazing Intervals Re-crop restrictions

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Contaminated soil amendments' - elana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Contaminated soil amendments

Contaminated soil amendments

Cecil Tharp, Montana State University

Pesticide Education Program


Be aware of the various modes of pesticide movement into non-target areas: Read Environmental and Precautionary Statements!

  • Be Aware of Drift

  • Grazing Intervals

  • Re-crop restrictions

  • Pre-harvest intervals

  • Cutting restrictions

  • Composting restrictions


Non target toxicity towards beneficial plants on the rise
Non-target toxicity towards beneficial plants on the rise. non-target areas: Read Environmental and Precautionary Statements!

  • 2009 – 2011: 104 plant samples through Schutter Diagnostic Laboratory (31 counties*)

    • 81 (79%) samples: damage likely compost/manure/clippings

    • 23 (21%) samples: damage likely drift or treatment under or near woody (ornamental) plants


Top 5 counties
Top 5 Counties non-target areas: Read Environmental and Precautionary Statements!

  • Ravalli – 18 reports (includes injury complaints associated with manure/compost point contamination), Gallatin -16, Lewis and Clark – 9, Sweet Grass and Teton – 5 each, Flathead, Lake, Musselshell – 4 each


Understanding your pesticides persistence
Understanding your pesticides persistence non-target areas: Read Environmental and Precautionary Statements!

  • See the Mont-Guide titled: Minimizing Pesticide Contaminated soil around the Home and Garden: MSU Distribution (406-994-3273)

  • Understand Persistence

    • The ability of a pesticide to remain present and active in its original form for an extended period prior to breaking down.

      • Based on a pesticides ½ life.

      • Based on characteristics of soil

        • Aerobic or anaerobic

      • Long persistence  present at wrong sites


Acie non-target areas: Read Environmental and Precautionary Statements! C. Waldron, Pesticides and Groundwater Contamination, Ohio State University

Extension Bulletin 820, 1992 available at <http://ohioline.ag.ohio-state.edu/b820/index.html>.


Pesticides persistence is still dependent on many other factors
Pesticides Persistence is Still non-target areas: Read Environmental and Precautionary Statements!Dependent on many other Factors

  • Microbial Action - Process by which chemicals are degraded by bacteria or fungi

  • Photodegradation: the breakdown of chemicals by sunlight

  • Chemical Degradation:

    • Hydrolysis: The breakdown of chemicals with water increases in soils with a high pH.

    • If > 8.0 (highly alkaline)  lower the pH for better results:

      • Use Buffercide, Bufferplus, Unifilm B, or Nutra Plus.

    • Recommend water within a range of 4 – 7


Picloram breaks down slowly in all soils always read product label picloram
Picloram non-target areas: Read Environmental and Precautionary Statements! breaks down slowly in all soils…Always Read Product Label(picloram)



New chemicals on the horizon
New Chemicals on the Horizon conditions.

  • 355 complaints of damage or injury towards trees.

  • A new herbicide used to manage broadleaf weeds in turf is implicated.

  • Aminocyclopyrachlor is expected to have a registration for pasture and rangeland in 2015.

Aminocyclopyrachlor Damage – ‘Perspective’


Proper diagnosis is key
Proper Diagnosis is Key conditions.

  • Many samples are not from

    pesticide damage.

    • Insect Damage

    • Plant Pathogens

    • Other abiotic plant stresses

  • Not any one pesticide can be blamed for all mis-use.

    • Growth regulator herbicide damage is likely the culprit for a majority of samples.

      • Major culprits: aminopyralid, picloram, clopyralid, fluroxypyr, aminoclyclopyrachlor

    • We need to increase the number of investigations which precisely confirm the exact chemistry.


Proper diagnosis is key1
Proper Diagnosis is Key conditions.

  • Get an idea if you have a problem

    • Use the MSU Extension non-target toxicity website.

    • Use MSU Extension agents

    • Send samples to MSU Schutter Diagnostics

    • Conduct bioassays


Conducting a bioassay
Conducting a bioassay conditions.

Figure 2: Results of a bioassay with known concentrations of aminopyralid. Plants shown are at six weeks after planting. Note leaf curling on plant grown in 5ppb (parts per billion) aminopyralid and death of plants at higher levels.


Use the non target toxicity around the home and garden website
Use the ‘Non-Target Toxicity around the Home and Garden Website’

  • A platform for delivering non-target toxicity information to the public and educators.

    • www.pesticide.montana.edu then select ‘Non-Target Toxicity Around the Home and Garden’.


Msu video s available online
MSU video’s available online Website’

  • Part 1

    • http://www.youtube.com/watch?v=zDXXkeEbIXE

  • Part 2

    • http://www.youtube.com/watch?v=KCnajfbwsSY

  • Part 3

    • http://www.youtube.com/watch?v=Ai4V-1XyLn0


For more information
For more information: Website’

Cecil Tharp

Pesticide Education Program

Montana State University

Phone: (406)994-5067

Email: [email protected]


Pgr symptoms from manure compost or grassclippings
PGR symptoms from manure, compost or Website’grassclippings.


ad