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Pests & Bioamplification Food webs in Grassland vs. Potato Field

Pests & Bioamplification Food webs in Grassland vs. Potato Field. Pests & Bioamplification Food webs in Grassland vs. Potato Field. Pests & Bioamplification Food webs in Grassland vs. Potato Field. Pests & Bioamplification Foodwebs in Grassland vs. Potato Field.

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Pests & Bioamplification Food webs in Grassland vs. Potato Field

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  1. Pests & Bioamplification Food webs in Grassland vs. Potato Field

  2. Pests & Bioamplification Food webs in Grassland vs. Potato Field

  3. Pests & Bioamplification Food webs in Grassland vs. Potato Field

  4. Pests & Bioamplification Foodwebs in Grassland vs. Potato Field

  5. Pests & Bioamplification Foodwebs in Grassland vs. Potato Field

  6. Pests & Bioamplification Foodwebs in Grassland vs. Potato Field

  7. Pests & Bioamplification Foodwebs in Grassland vs. Potato Field

  8. Pests & Bioamplification Foodwebs in Grassland vs. Potato Field

  9. Pests & Bioamplification Pesticide: a substance used to kill a pest

  10. Pests & Bioamplification Pesticide: a substance used to kill a pest Broad-spectrum pesticide: effective against many types of pests e.g. DDT is toxic to most insect species

  11. Pests & Bioamplification Pesticide: a substance used to kill a pest Broad-spectrum pesticide: effective against many types of pests e.g. DDT is toxic to most insect species Narrow-spectrum pesticide: effective against only a few types of pests e.g. Bt, a modern pesticide from bacteria is toxic only to caterpillars

  12. Pests & Bioamplification How pesticides work: 1. Physical harm: e.g. diatomaceous earth scratches the waxy outer coating of insects so they dehydrate

  13. Pests & Bioamplification How pesticides work: 1. Physical harm: e.g. diatomaceous earth scratches the waxy outer coating of insects so they dehydrate 2. Biological harm: e.g. some herbicides interfere with photosynthesis

  14. Pests & Bioamplification Issues with pesticides: 1. Non-target species: pesticides often kill species they were not intended to kill

  15. Pests & Bioamplification Issues with pesticides: 1. Non-target species: pesticides often kill species they were not intended to kill 2. Bioamplification: the increasing concentration of a pesticide as it moves up the food chain

  16. Pests & Bioamplification Persistent chemicals: pesticides that do not break down in a short time

  17. Pests & Bioamplification Persistent chemicals: pesticides that do not break down in a short time -they bioamplify because they are passed up the food chain

  18. Pests & Bioamplification Persistent chemicals: pesticides that do not break down in a short time -they bioamplify because they are passed up the food chain -today pesticides are developed to break down quickly to avoid this buildup

  19. Pests & Bioamplification Pesticide Resistance: when a species targeted by a pesticide are no longer affected by it.

  20. Pests & Bioamplification Organic Farming: the system of agriculture that relies on non-synthetic pesticides and fertilizers

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