PPT-Toxic Effects of Pesticides

Matthew T Martin PhD National Center for Computational Toxicology Office of Research amp Development US Environmental Protection Agency RTP NC 27711 Email martinmattepagov. What are pesticides, and how do they effect the environment and people if improperly used?. Pesticides. are substances intended for preventing, destroying and repelling insects, weeds, rodents and fungus.. Text pages 52-57. 2. What are pests?. Pest:. . An organism that is harmful or inconvenient to people. . . 3. What are pests?. Examples: . dandelions. , rodents,. . insects. , . micro-organisms. 4. Oceans and Atmosphere. Sharon Hook. | Senior Research Scientist. 2 August 2016. Modern use pesticides| Sharon.Hook@csiro.au. 2. |. Organophoshate. pesticides. malathion, parathion, . diazinon. , . Studying Effects of hazards. Risk Assessment & Risk Management. Philosophical and Policy Approaches. Toxicology. Environmental Health . We face four types of environmental hazards. Physical, Biological, Chemical, Cultural. Outline. Importance of our environment. What is environmental degradation?. Water. Air. Harm or loss of beneficial insects. Conclusions. Importance of our environment. This is were we live, work, and play. Quick overview of IPM. Types of pesticides and active ingredients. Pesticide toxicity and impacts. Less toxic and organic pesticides. Reading pesticide labels. Topics covered in this presentation. What is Integrated Pest Management (IPM)?. Pesticides and the Environment Kelly Hammond History As early as 1000 BC mankind has attempted to control pests. The Greek poet Homer cited sulfur as an early insecticide. The Chinese used arsenic as an insecticide by 900 AD. Absorption of toxins in the GIT is by passive diffusion – this process requires that the substance cross cellular barriers . Toxins that are not absorbed from the GIT do not produce systemic effects but may produce local effects – diarrhea, bleeding and malabsorption of nutrients . Page 1Rev Jan 2017What are Toxic SubstancesToxic substances can be defined as broad group of chemicals capable of causing harm to plants and animals including humans There are several classes of toxic Global Harmonization Initiative (GHI). Chemicals that are not allowed but nevertheless present in food. . are not necessarily additive. s. .. Most man-made chemicals occur in nature in concentrations that can be detected now, but not previously. . GHULAM MURTAZA. Department of Soil And Environmental Sciences, UCA, University of Sargodha. . Pesticide. A pesticide is any substance or mixture of substances intended for preventing , destroying , repelling , or mitigating any pest.. How Soil Solarization Works. Soil Solarization. Agricultural “Warfare”. Current Practice: Herbicides. What is an . herbicide. ?. Herb = plant. -. icide. . = describes the act of killing. For example: suicide or genocide. chemical, . natural. or . human-made. , that is designed to kill another . organism.. Definitions. . Using that broad . definition. There . are . hundreds . of thousands of pesticides in the natural environment. . centER. . national hospital – . srI. . lanka. What is a Pesticide?. A pesticide is any substance or mixture of substances used to kill , destroy , repel or prevent the growth and development of a living organism.(a pest)..