Pesticide Warning Symbols

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Pesticide Warning Symbols

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ZIMSEC O Level Integrated Science Notes: Pesticide Warning Symbols

  • Pesticides are graded according to their toxicity i.e.
  • According to how harmful they are to humans.
  • Every pesticide must have a label that clearly shows its “danger” level show.
  • There are four common danger levels of chemicals.

Purple triangle

Extremely poisonous chemical.

Extremely poisonous chemical.

  • For example Methyl bromide used in tobacco seedbed fumigation.
  • Must be handled with extreme care.
  • The poison is extremely lethal,
  • Full protective clothing including gloves, coveralls and goggles, breathing mask must be worn when handling such chemicals.

Red Triangle

Very dangerous

Very dangerous poison

  • Means the poison is very dangerous.
  • Must be handled with care and all the safety precautions must be followed.
  • Should not be used in the home.

Amber Triangle


  • Poisonous pesticide.

Green/Caution Triangle


  • Is less toxic but must still be handled with caution.
  • May be used in the home.
  • For example Killem and other aerosolized sprays.

To access more topics go to the Integrated Science Notes page.

By | 2017-01-17T11:18:15+00:00 August 14th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|3 Comments

About the Author:

He holds an Honours in Accountancy degree from the University of Zimbabwe. He is passionate about technology and its practical application in today's world.


  1. tapiwa jones February 27, 2016 at 3:24 pm - Reply

    Comment…why are there no notes on science in industry?

    • Garikai Dzoma February 27, 2016 at 4:37 pm - Reply

      Seriously read the FAQs first and you might want to check our register notes too!

  2. Sheikh Abdul Ali July 4, 2017 at 8:57 pm - Reply

    Thank u very much nice answers

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