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Pesticide Training Course UC Davis, Defining Pesticides. Part 2 of 5

Basic information on pests related to crop and pesticide use

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Pesticide Training Course UC Davis, Defining Pesticides. Part 2 of 5

  1. 1. Prepared by Mark Bell, Mark Henderson and Frank Zalom with input from Ehsan Ehsanullah and Tom Brown
  2. 2. Course objectives Know key points in the application and safe use of pesticides Note: At the end, participants will take a review quiz to show they can recall all the key points. Support materials – fact sheets and check lists, review quiz,
  3. 3. Course structure Pesticides Defining pests Defining pesticides Do I need to spray? About equipment? Safety
  4. 4. Defining Pesticides What is a pesticide? A pesticide is any material (natural, organic, or synthetic) used to control, prevent, kill, suppress, or repel pests.
  5. 5. Defining Pesticides Match the pesticide with... what it controls… Insecticides Herbicides Fungicides Rodenticides Miticides Molluscicides Diseases Insects Weeds Snails and slugs Rats and mice Mite
  6. 6. Defining Pesticides Will different pesticides control other types of pests? For example, will a herbicide control insects? Almost never!
  7. 7. Defining Pesticides If you have more than one type of problem pest (say a disease and an insect), can you mix pesticides? Sometimes, but read the label Many times mixing products will mean products do not work
  8. 8. Defining Pesticides "Pesticides" come in different forms. The most common are: Water soluble (WS) Emulsifiable concentrates (EC) Wettable powders (WP)
  9. 9. Defining Pesticides Which requires constant agitation in the tank? Water soluble Emulsifiable concentrates Wettable powders Why? Because they separate out of solution What happens if they separate out of solution? Uneven chemical application – uneven control Unhappy customers!  
  10. 10. Defining Pesticides Which causes greater nozzle wear? Water soluble Emulsifiable concentrates Wettable powders
  11. 11. Defining Pesticides Match the following: Contact pesticide Systemic pesticide Moves through the plant to have its effect. Must hit the target pest or coat the plant being protected. Requires complete coverage of the plant for best effect.
  12. 12. Defining Pesticides What is the difference between a selective and a non- selective herbicide? A non-selective herbicide ….. Kills all weeds (and the crop!) A Selective herbicide…. Kills certain weeds in certain crops
  13. 13. Defining Pesticides What was used here – a selective or a non-selective herbicide? A Selective herbicide…. has only affected the weed – not the crop
  14. 14. Defining Pesticides What is LD50? LD50 tells about the toxicity or danger of a product to humans and animals. LD50 is the dose required to kill half a non-target population of animals (usually rats). Which is safer? Product A LD50 = 750 Product B LD50 = 1750 Why? Because more of product B is required to have the same toxic effect. Aim to use products with an LD50 of more than 1000.
  15. 15. Defining Pesticides All products carry key “signal” words on the label telling about the potential dangers of a product Look for Caution Warning Danger Which do you think is most dangerous? Which is least dangerous?
  16. 16. Prepared by Mark Bell, Mark Henderson and Frank Zalom with input from Ehsan Ehsanullah and Tom Brown

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  • Prachichauhan33

    Feb. 4, 2019

Basic information on pests related to crop and pesticide use

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