1 / 11

CHAPTER 15 PEST CONTROL

CHAPTER 15 PEST CONTROL. -In the US 13% OF ALL CROPS DAMAGED BY INSECTS World Wide 33%. PEST CONTROL. A pest –organism that occurs where unwanted or in amounts large enough to harm ecosystem.

kana
Download Presentation

CHAPTER 15 PEST CONTROL

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CHAPTER 15PEST CONTROL -In the US 13% OF ALL CROPS DAMAGED BY INSECTS World Wide 33%

  2. PEST CONTROL • A pest –organism that occurs where unwanted or in amounts large enough to harm ecosystem. Wild plants naturally have greater protection from pests than non-genetically altered planted crops. Why?

  3. PESTICIDES • Pesticides (chemicals) Used to kill pests. • Last 50 years many new pesticides, increased crop yields. • What is the downside of pesticide use? What does pesticide resistant mean? - More than 500 pests have developed resistances to pesticides.

  4. Pesticides • Human Health Concerns • In areas where crops are sprayed w/pesticides, children have higher rates of cancers. • Workers develop nervous system disorders (farm and producers of pest.)

  5. Pesticide Use • Top seven fruits/vegetables that are sprayed and may affect you: • Strawberries, blueberries, peppers, tomatoes, grapes, cherries, cucumber

  6. Biological Pest Control • Pathogens • Used to control pests. Most commonly used Bt. Kills caterpillars of moths and butterflies.

  7. Biological Pest Control • Disrupting Insect Breeding • Growth Regulators - Crops are bred with a gene that when expressed in a plant and consumed will disrupt the consumers breeding abilities. • Pheromones – Chemicals produced by an organism to affect another. Farmers • treat crops w/pheromones to confuse moths and prevent mating.

  8. Biological Pesticide Control • Plant Defenses • Genetically altered plantsare resistant to fungi, worms and viruses. Other defenses: tough skin and chemical compounds that pests do not like.

  9. Biological Pest Control • Chemicals from plants: • Chemicals contained in chrysanthemums • sold as pesticides. • These chemicals are biodegradeable.

More Related