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25 Cards in this Set
- Front
- Back
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Adsorption
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Attachment of pesticide to soil particles, which reduces risk of movement out of the soil into water systems
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Aquifer
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Body of groundwater capable of providing significant quantities of water to well or spring
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Back-siphoning
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Movement of liquid pesticide mixture back through filling hose into water source
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Biological diversity
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Variety and differences among living things, and complex ways in which they interact
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Critical habitat
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Areas of land, water, and air space that "endangered species" need for survival
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Exposed
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Subject to contact with pesticides
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Leaching
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Movement of pesticide in water or other liquid downward through soil or other planting medium
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Organic matter
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Materials and debris that originated as living plants or animals
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Permeability
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General measure of how fast water can move downward in particular soil
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Persistent
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Chemical that remains active for more than one season
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Texture
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Relative proportation of sand, silt, and clay particles in soil
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"Threatened species"
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Species that will eventually become extinct if corrective action is not taken to save it
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Water table
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Dividing line between groundwater and unsaturated rocks and soil above it
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Which pesticide-handling activities pose a threat to groundwater or "endangered" species?
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All of them
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What is the main factor that determines whether you must take special action to protect groundwater or "endangered" species?
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The location of your pesticide-use site
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How will you know if you must take special action to protect groundwater or "endangered" species?
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Read the label for warning. May refer to other sources for more info (labeling, etc.)
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What are some factors that determine whether pesticides will reach goundwater?
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1. Practices followed
2. Presence of water on site 3. Chemical characteristics of pesticides 4. Type of soil 5. Location of groundwater 6. Type of formations above groundwater |
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How can risk of contaminating groundwater be reduced?
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1. Stick with label directions
2. Avoid risky application types 3. No back-siphoning 4. Locate pesticide storage and mix-load sites at least 100-ft away from water sources 5. Dispose of items carefully 6. Dispose of rinsate correctly |
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Explain why the amount of water on the surface at a use site is an important factor in groundwater contamination.
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The more water on the surface, the more likely that leaching can occur
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Explain how "solubility" of a pesticide will affect its ability to move into groundwater.
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Pesticides that dissolve easily in water are more likely to move into water systems
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Explain how "Adsorption" of a pesticide will affect its ability to move into groundwater.
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Pesticides that become tightly attached to soil particles are not likely to move out of the soil into water systems
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Explain how "persistence" of a pesticide will affect its ability to move into groundwater.
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Pesticides that do not break down quickly remain in the environment for a long time and are more likely to move into ground water
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What types of soil slow movement of pesticides into groundwater?
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Soils that are fine-textured and contain organic matter
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What types of soil speed movement of pesticides into groundwater?
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Coarse, sandy soils
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What geologic factors affect the movement of pesticides into ground water?
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1. Distance to groundwater
2. Permeability of geologic layers 3. Presence or absence of sinkholes |
