Pesticide

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Pesticides are not the only cause responsible for ecological damage, but they are certainly one of the more serious causes.
This kind of danger has long been ignored, until the reported fears have become tragic realities.

Published in: Environment, Business, Technology
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  • So let me recap what I’ve said:
    What is pesticide
    The fate of pesticides
    Alternative approaches

    I therefore believe that this topic are
    That brins me to the end of my talk today
    I woul like to thank you for being such an attentive audiance
    I would like be happy to answer any question you may have.
  • Pesticide

    1. 1. May 26, 2014FRANCESCA DI NICOLA 1 The fate of pesticides in the environment PESTICIDE Corso di Laurea Magistrale in Valutazione d’Impatto e Certificazione Ambientale
    2. 2. May 26, 2014 THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA 2 1.What are pesticides? 2.What happens to a pesticide after use? 3.Effect and alternative approaches
    3. 3. May 26, 2014 3 Pesticides are chemicals or biological agents used to:  CONTROL  REPEL  ATTRACT  KILL Pesticides can harm the environment and cause harm to humans. They are a cause of serious losses that are undergoing bee populations. THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    4. 4. May 26, 2014 4 The pesticides used in an arable crops, can: be absorbed by plants or be ingested by organisms volatilize into the atmosphere be leached out by rain or irrigation water THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    5. 5. May 26, 2014 5 The most useful index for quantifying pesticide bioaccumulation is the partition coefficient KOW. BIOACCUMULATION refers to the accumulation of pesticides, or other organic chemicals in an organism. THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA W O OW a a K 
    6. 6. May 26, 2014 6 VOLATILIZATION is described by Henry's law constant. Kh characterizes the tendency for a pesticide to move between the air and the "soil water." Kh is defined as: the concentration of pesticide in air divided by the concentration in water. THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    7. 7. May 26, 2014 7 When the pesticide enters soil, may enter into SOLUTION, or may be ABSORBED by the soil particles. The "distribution coefficient" value is a measure of how well the pesticide binds to soil particles. The Kd is the "soil-water" partitioning coefficient. THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    8. 8. May 26, 2014 8 THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    9. 9. May 26, 2014 9 PERSISTENCE defines the "lasting-power" of a pesticide. The persistence is closely linked to the degradation of the pesticide. The degradation is measured in half-life and corresponds at the amount of time it takes for one-half the original amount of a pesticide in soil to be deactivated. Compounds with an extremely long degradation time are considered persistent. THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    10. 10. May 26, 2014 10 Pesticides can enter into organism through body, or by ingestion of contaminated food. Farmers and their families reach toxic levels in their bodies. The exposure can cause mutations, produce tumors, etc. Other problems associated with insecticides is the ability of populations of insects become resistant in a couple of generations. Most pesticides kill beneficial as well as pest species. DISEASES TO HUMANS LOSS OF EFFICACY KILL BENEFICIAL ORGANISMS THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA
    11. 11. May 26, 2014 11 Many alternatives are available to reduce the effects of pesticides on the environment. There are a variety of alternative pesticides, for example: THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA • manually remove weeds and pests from plants, • setting traps and baits for catching • The parasites can be prevented by removing breeding sites of the parasite, • planting of native species that are naturally more resistant to pests native • using biocontrol agents
    12. 12. May 26, 2014 12 1.What are pesticides? 2.The fate of pesticide 3.Effect and alternative approaches THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA Pesticides are not the only cause responsible for ecological damage, but they are certainly one of the more serious causes. This kind of danger has long been ignored, until the reported fears have become tragic realities.
    13. 13. May 26, 2014 13 THE FATE OF PESTICIDES IN THE ENVIRONMENT DI FRANCESCA DI NICOLA

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