mobile feed weather
Search

Visit our new site Pesticidewise.com for more help on spraying pesticides with a knapsack sprayer including:

and more.

Safety Precautions When Mixing and Preparing Crop Protection Products (pesticides) for Use

N.B. This is a text only version of the training module "Safety Precautions When Mixing and Preparing Crop Protection Products (pesticides) for Use" which is also available to download as a PowerPoint presentation or view as a Flash Movie


We welcome your feedback on the site. Please take a few moments to let me (helen.editor@stewardshipcommunity.com) know what you think: https://www.surveymonkey.co.uk/r/GRB538Y

Mixing and preparing undiluted pesticide products: summary

  1. Always maintain high standards of hygiene when working with crop protection products (pesticides).
  2. Work in an area away from children and animals.
  3. Avoid any risk of polluting water courses.
  4. Ensure you understand the product label information: especially product dose rate and safety requirements when mixing and preparing the product.
  5. Only use dedicated equipment for measuring and weighing products: Do not use food containers or cutlery.
  6. Wash all equipment and empty containers after the spraying job is completed.
  7. Store equipment safely away from animals and children.

Mixing and preparing undiluted pesticide products: exposure risks

Most exposure to crop protection products (pesticides) by operators is when: 

  • Mixing and weighing out
  • Working with a leaking sprayer
Bad practice: no masks, no gloves, working with leaky equipment (16 Kb JPEG)
Bad practice: no masks, no gloves, working with leaky equipment

Measuring crop protection products (pesticides) for spraying

Measuring jugs (4 Kb JPEG)
Measuring jugs

Accurate measurement of undiluted product is vital to ensuring that the correct dose is applied.

Only apply the prepared product solution using calibrated spray equipment.

Never exceed the label recommended dose.

Mixing and preparing undiluted pesticide products: before starting

Read and understand the product label; illustration of label being read (7 Kb JPEG)
Read and understand the product label

Before starting any spraying activity always:-

  1. Read and understand the product label
  2. Check the sprayer for leaks
  3. Ensure you have the correct PPE
  4. If you feel unwell then do not work with pesticides

Product Labels are the most critical information source

Product labels are the most critical information source; Example of product label (51 Kb JPEG)
Product labels are the most critical information source

Notes to slide: The product label is very important.  It is the most important piece of information which tells the user everything he needs to know to be able to use the product safely and effectively.

Mixing and preparing undiluted pesticide products; follow best practices

NEVER decant products into other containers; illustration (18 Kb JPEG)
NEVER decant products into other containers

Never mix products or fill sprayers close to water courses, wells or where products could get into ground water.

Never decant products into other containers.

Always dispose of empty packaging and other contaminated waste following best practice.

Use a safe area; example work area (18 Kb JPEG)
Use a safe area

An area to work in must:

  • Have clean water available for washing
  • Be free from obstructions and trip hazards
  • Be free from children and animals
  • Have an adequate water supply but is not too close to surface water or a well head
Keep children and animals away from work area; illustration (15 Kb JPEG)
Keep children and animals away from work area

Preparing a spray mixture

Never use old food containers, or spoons; illustration (16Kb JPEG)
Never use old food containers, or spoons

Special care is necessary when handling concentrated products. Always follow the label recommendations for PPE.

Use a graduated measuring jug or measuring device supplied with the product to measure out required quantities. Never use old food containers, or spoons.

Use a graduated measuring jug or measuring device supplied with the product to measure out required quantities; illustration (11 kb JPEG)
Use a graduated measuring jug or measuring device supplied with the product to measure out required quantities.

Minimum protective equipment: working with small sprayers

Working with undiluted product (mixing & measuring)

Read and follow the label; illustration showing required personal protective equipment for working with undiluted product (mixing and measuring) (23 Kb JPEG)

Notes to slide: Handling concentrate, when mixing and measuring, requires more protection.  The minimum for handling liquid concentrate would be long sleeved shirt, long trousers, rubber boots, gloves preferably made from nitrile rubber, which is more resistant to most chemicals than natural rubber, and eye protection such as a faceshield or goggles . A faceshield is usually preferable to goggles, since it protects the whole face, not just the eyes, and is cooler to wear in hot climates.

Minimum protective equipment: working with larger sprayers

Loading a tractor mounted sprayer showing full PPE and ground protection to capture any spilled material (16 Kb JPEG)

Loading a tractor mounted sprayer showing full PPE and ground protection to capture any spilled material.

Pouring and measuring out liquids: use safe practices

Use safe practices. Do not splash. Pour with care; illustration (37 Kb PDF file)

Pouring and Measuring out dry pesticide products: minimum protective equipment

Mixing & measuring dry products such as granules or powders

Also use a mask when mixing/measuring dry products such as granules/powders; illustration(26 Kb)

Notes to slide: When measuring and mixing powders, the addition of a dust mask is necessary to prevent any powder being inhaled. Some more toxic pesticides require more protection, such as an apron or respirator and the label should always be consulted for the recommended protection for the product.

Mixing and preparing undiluted pesticide products: protecting hands

Nitrile gloves give better skin protection; illustration (10 Kb JPEG)
Nitrile gloves give better skin protection

Personal Protective Clothing:

Gloves:

  • Nitrile gloves give better skin protection compared with rubber gloves, especially when using EC formulations (solvent based).
  • Gloves should be worn tucked into the sleeves to stop any spillage running into the gloves.
  • If nothing else is available use small plastic bags to protect the hands. Only use these bags once.
  • Never use absorbent gloves such as leather or cotton or bare hands.
Never use absorbent gloves or bare hands; illustration (10 Kb JPEG)
Never use absorbent gloves or bare hands

Mixing and preparing undiluted pesticide products: protecting face and body

A simple visor can be made from a clean plastic drinks bottle; illustration (19 Kb JPEG)
A simple visor can be made from a clean plastic drinks bottle

Personal Protective Clothing

Eye protection

  • Clear visor, goggles or safety glasses. A simple visor can be made from a clean plastic drinks bottle.
a large heavy-duty plastic sack such as an empty fertiliser sack can be shaped into an apron to protect the front of the body (8 Kb JPEG)
a large heavy-duty plastic sack such as an empty fertiliser sack can be shaped into an apron to protect the front of the body.

Body protection

  • Use a proper apron. If none available then a large heavy-duty plastic sack such as an empty fertiliser sack can be shaped into an apron to protect the front of the body.

Preparing a spray mixture of more than one pesticide product

If mixing several products in the spray tank -

  1. Check that the products are compatible.
  2. First half fill the tank with water
  3. General mixing rule: “First the solids, then the liquids” (see box)
  4. Stir with (for example) a stick; never by hand
  5. Add empty container washings to tank and fill with the rest of the water to make the required amount of spray solution

 

Follow this order when mixing:

Solid formulations first 

WG < 100 g/ha
WSB
WG > 100 g/ha
WP

Then follow with liquids 

SC
SE
EW
EC
SL
Adjuvant 

Where:

  • WG = Water dispersible granules
  • WSB = Water soluble bag
  • WP = Wettable powder
  • SC =Soluble concentrate
  • SE =Suspo-emulsion
  • EW = Emulsion (Oil in water)
  • EC = Emulsifiable concentrate
  • SL = Soluble concentrate
  • Adjuvant= substance without CPP properties, added to improve effectiveness of the CPP

Mixing and preparing undiluted products: clean up spills 

Always clean up any spills immediately, using absorbant material such as sawdust, soil - to soak up any spillage.

Collect up any spillage and contaminated waste, put into a strong bag or container and dispose of following local legislation and best practice.

Always clean up any spills immediately, using absorbant material such as sawdust, soil - to soak up any spillage; illustration (27 Kb JPEG)
Always clean up any spills immediately, using absorbant material such as sawdust, soil - to soak up any spillage.

Mixing and preparing undiluted pesticide products: safety

Always wash after working with chemicals, starting from top downwards; illustration (30 Kb JPEG)
Always wash after working with chemicals, starting from top downwards
  • Wash off any chemical product from skin immediately
  • Do not eat, drink or smoke when handling chemicals.
  • Do not leave products unattended and within reach of children or animals
  • Clean all equipment after use and return unused product to the locked store
  • Always wash after working with chemicals, starting from top downwards
  • Take great care not to contaminate any drinking water sources

Further Reading


Crop Life's Guideline for the safe and effective use of crop protection products(7.4 Mb pdf file)

Trainer Notes

  • Have some product labels available.
  • Show examples of measuring devices

Questions:

  1. What are the PPE requirements when mixing liquid and solid formulations?
  2. What safety measures must be taken into consideration when mixing and  weighing? (Should be able to give at least 7 answers).
  3. Identify the pictograms on a product label.

 
汉语
 
हिन्दी
 
Español
 
Português
 
Français