1. Pests & Pesticides Pest: any plant, animal, or other living organism that causes illness or harm and is an annoyance to humans

2. Pests & Pesticides Pest: any plant, animal, or other living organism that causes illness or harm and is an annoyance to humans e.g.weeds –compete with crops

3. Pests & Pesticides Pest: any plant, animal, or other living organism that causes illness or harm and is an annoyance to humans e.g.weeds –compete with crops insects –eat crops

4. Pests & Pesticides Pest: any plant, animal, or other living organism that causes illness or harm and is an annoyance to humans e.g.weeds –compete with crops insects –eat crops parasites –eat humans

5. Pests & Pesticides There are no "pests" in natural ecosystems. -only producers, consumers, and decomposers.

6. Pests & Pesticides There are no "pests" in natural ecosystems. -only producers, consumers, and decomposers. -natural ecosystems are in balance

7. Pests & Pesticides There are no "pests" in natural ecosystems. -only producers, consumers, and decomposers. -natural ecosystems are in balance Pests are only "pests" in artificial ecosystems because these ecosystems are not in balance. -we have to control the pests

8. Pests & Pesticides Pesticide: a substance used to kill pests

9. Pests & Pesticides Pesticide: a substance used to kill pests Problems with Pesticides: 1. Pollution: sprayed pesticide that gets carried away and affects surrounding air, soil, or water

10. Pests & Pesticides Pesticide: a substance used to kill pests Problems with Pesticides: 1. Pollution: sprayed pesticide that gets carried away and affects surrounding air, soil, or water 2. Non-target Organisms: other insects, such as honeybees, can be killed

11. Pests & Pesticides Pesticide: a substance used to kill pests Problems with Pesticides: 1. Pollution: sprayed pesticide that gets carried away and affects surrounding air, soil, or water 2. Non-target Organisms: other insects, such as honeybees, can be killed 3. Bioaccumulation: the build up of a pesticide in the body of an organism -pesticides can become toxic to humans if allowed to build up in our bodies

12. Pests & Pesticides 4. Bioamplification: the increase in concentration of a pesticide as it moves higher up the food chain

13. Pests & Pesticides 4. Bioamplification: the increase in concentration of a pesticide as it moves higher up the food chain 5. Resistance: insects can develop resistance to a pesticide and it requires more to do its job or becomes useless