Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Pesticide Training Course UC Davis, Defining Pests. Part 1 of 5

  • Be the first to comment

  • Be the first to like this

Pesticide Training Course UC Davis, Defining Pests. Part 1 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 pests  What is a pest?  “Any organism that damages crops”  Do all pests need to be controlled?  No  Why?  Only important if cause economic loss Other reasons?  e.g., Long term build up
  5. 5. Defining pests  What are the options for controlling pests?  Cultural – such as variety and hand weeding  Biological control - e.g., Lady bugs eat aphids  Pesticide Note: All photos UC IPM – unless otherwise indicated
  6. 6. Defining pests What are the major types of pests? Weeds Insects Diseases Mites Rodents Snails & slugs
  7. 7. Defining pests – why important? Weeds Insects Disease Mites Rodents Snails/ slugs Compete for water nutrients and light  Reduce fruit quality ()   () () () Reduce leaf area (PS)      Reduce nutrient flow in plant  PS = photosynthesis
  8. 8. About Weeds Not all weeds are the same Grasses Broadleaves Sedges
  9. 9. About Weeds What characterizes Grasses?  Leaves are narrow, arranged in sets of two; stems are rounded or flattened.
  10. 10. About Weeds What characterizes Broadleaves?  Leaves are wide, veins branch out in different directions.
  11. 11. About Weeds What characterizes Sedges?  Leaves are narrow, arranged in sets of three; stems are triangular in cross section.
  12. 12. About weeds  Why is this important?  Can you control a grass with a broadleaf herbicide?  Rarely!  Do different broadleaves need different types of herbicide?  Often – as do different grasses and different sedges  The exception to all is when a non-selective herbicide can be used to control everything
  13. 13. About Diseases Not all diseases are the same Bacteria Fungal Viruses
  14. 14. About Diseases Just like weeds, each disease and each type almost always needs a different treatment  Viruses can almost never be controlled by chemicals  Viruses are usually spread by insects – so insect control may be the best form of control for viruses
  15. 15. About Diseases  Note that many diseases (especially bacteria and viruses) spread by contact.  Thus it is important to advise orchard growers to sterilize any pruning equipment or other equipment used to chop branches, etc..
  16. 16. Prepared by Mark Bell, Mark Henderson and Frank Zalom with input from Ehsan Ehsanullah and Tom Brown

    Be the first to comment

    Login to see the comments

Views

Total views

1,844

On Slideshare

0

From embeds

0

Number of embeds

316

Actions

Downloads

104

Shares

0

Comments

0

Likes

0

×