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Transcript of Pesticides Prezi
Naganathan What is It? -Substance or mixture of substances that is used to prevent and destroy repelling pest - Commonly known to protect plants from insects, weeds and diseases What's Inside? Health Effects Pesticides are the world's leading cause of poisoning How Does it work? - Contact Pesticides are absorbed through the external body surface of plant tissues which repel pest from plants -Pests include insects, mice and other animals, weeds, or microorganisms such as bacteria and viruses. Examples of Common Pesticides - Mosquito sprays - Rat poisons - Household Cleaning products - Swimming pool chemicals - Lawn and garden products that kill insects and weeds Environmental Effects This flows with rainwater into nearby streams where it affects the most living organisms of the ecosystem These health problems can develop in anyone after being exposed to a pesticide: - Risk of Cancer - Damages the reproductive system - Damages the nervous system - Can cause birth defects Conclusion Symptoms/Signs : - mild headaches - flu-like symptoms - skin rashes - blurred vision Tips to prevent pesticide poisoning Types of Pesticides Insecticides: (Targets Insects)
– Inorganics Herbicides: (Target Weeds)
– Paraquat, diquat Fungicides Fumigants Repellants Acute: Chronic: -muscle weakness - anorexia - memory loss - seizures -Systemic pesticides can travel throughout the plant For ex. - Insecticides that are absorbed by the leaves transfer it throughout the plant where it kills sucking or chewing insects. - It is also transferred to the roots where it kills worms or caterpillars that are feeding on the plants roots -When pesticides are sprayed on plants it can be blown away by the wind. The pesticides gets passed from 1 organism to another organism Selective pesticides target pests while non-selective pesticides can kill/harm organisms that are not pests, like earthworms, butterflies, bees etc. - disturbs food chains - decrease biodiversity - damages ecosystems - causes decline in population or extinction in species Thank you for listening! 1. When using pesticides, always read the label for instructions of proper use 2. Don't use pesticides for other pests that isn't indicated on the label 3. Use the amount indicated on the label 4. Wash your hands immediately after using a pesticide 5. Keep pesticides out of children's reach 6. Wash grocery foods thoroughly before consuming it 8. Try to use natural or organic pesticides 7. Never mix pesticides Positive effects of Pesticides Negative effects of Pesticides - Population of harmful insects decrease - Kills pest that feed on crops - Pest that carry diseases are killed - Damages environment - Ecosystems are broken - Useful insects that cause no harm are killed - May cause health problems in the future - Species undergo decline in populations History - The first recorded use of insecticides was in 2500 B.C. by Sumarians, who used sulphur compounds to control insects and mites. - Insecticides used for body lice in China with mercury and arsenical compounds in 1200 B.C. - Burning sulfur to kill insects and using salt to control weeds in Ancient Rome.