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Cleaning Field Sprayers to Avoid Crop Injury PowerPoint PPT Presentation


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Cleaning Field Sprayers to Avoid Crop Injury. Is it drift or is it a contaminated sprayer?. Sprayer contamination could result in:. Symptoms that appear drift-like Crop loss Environmental pollution Reduced effectiveness of the tank mix Fines Lawsuits Loss of certification Loss of income.

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Cleaning Field Sprayers to Avoid Crop Injury

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Cleaning field sprayers to avoid crop injury l.jpg

Cleaning Field Sprayers to Avoid Crop Injury

Is it drift or is it a contaminated sprayer?


Sprayer contamination could result in l.jpg

Sprayer contamination could result in:

  • Symptoms that appear drift-like

  • Crop loss

  • Environmental pollution

  • Reduced effectiveness of the tank mix

  • Fines

  • Lawsuits

  • Loss of certification

  • Loss of income


Sources of contamination of spray equipment l.jpg

Sources of Contamination of Spray Equipment:

  • Improper or inadequate cleanout

  • Redissolved residues

  • Contamination from using remix water

  • Poly fiber tanks, old hoses

  • Low-rate actives with highly active molecules

  • Presence of tank mix partners

  • Mini-bulk contamination - repackaging


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Ways to reduce or avoid contamination:

  • Use pesticide resistant materials

    • stainless steel tanks

  • Removing enough liquid during the cleanout process

  • ‘Follow’ proper cleanout procedures

    • label information if provided

    • Extension publications

  • Adopting engineering controls

    • tank rinsing nozzles

  • Use special cleaners

  • Use a dedicated sprayer


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Steps for cleanout:

  • Work in a safe area (environment and people).

  • Hose down inside of tank

  • Fill tank have full and flush out through the nozzles.

  • Repeat and include a proper cleaning agent.

  • Flush final time with clean water.


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Steps for cleanout:

  • Spray and mix/load equipment should be thoroughly rinsed with clean water and the rinsate applied to field (according to label) prior to the cleaning process.

  • Three primary mechanisms:

    • Dilution, deactivation, and extraction

  • Select cleaning agents

    • Commonly use ammonia (not chlorine bleach)

    • Commercial tank cleaning agents or common household detergents (liquid or dry)


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General cleaning solutions:


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Web sites with clean-out information:

  • http://entweb.clemson.edu/pesticid/saftyed/dptclean.htm

  • http://www.weeds.iastate.edu/reference/pat30.pdf

  • http://muextension.missouri.edu/xplor/agguides/crops/g04852.htm

  • http://www.oznet.ksu.edu/library/ageng2/mf1089.pdf

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