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Questions and Answers
What risk is associated with using chemical weed killers in a home garden?
What risk is associated with using chemical weed killers in a home garden?
- Damage to valuable plants (correct)
- Improved weed control
- Enhanced soil fertility
- Promotion of healthy plant growth
What is the purpose of using chemicals in agriculture and institutional landscape maintenance work?
What is the purpose of using chemicals in agriculture and institutional landscape maintenance work?
- To enhance soil fertility
- To reduce time spent on manual weed control methods (correct)
- To increase the value of valuable plants
- To promote healthy plant growth
What are contact killers in the context of weed killers?
What are contact killers in the context of weed killers?
- Liquids that you spray or sprinkle on the undesired plants (correct)
- Chemicals used for post-emergence weed control
- Chemicals applied to the soil to kill weed seeds
- Chemicals that interfere with plant metabolism
What is the consequence of not following label directions when using chemical weed killers?
What is the consequence of not following label directions when using chemical weed killers?
What are pre-emergence controls in the context of weed killers?
What are pre-emergence controls in the context of weed killers?
Chemical weed killers should be used in a home garden without concern for damaging valuable plants.
Chemical weed killers should be used in a home garden without concern for damaging valuable plants.
Why should you be careful not to let the chemicals come in contact with anything but the weeds you're trying to kill?
Why should you be careful not to let the chemicals come in contact with anything but the weeds you're trying to kill?
All chemical weed killers can be used in established plantings without any risk of damaging other plants.
All chemical weed killers can be used in established plantings without any risk of damaging other plants.
Chemicals are primarily used in agriculture and institutional landscape maintenance work to save time spent on manual weed control methods.
Chemicals are primarily used in agriculture and institutional landscape maintenance work to save time spent on manual weed control methods.
Pre-emergence controls involve applying chemicals to the soil to kill weed seeds after they have germinated.
Pre-emergence controls involve applying chemicals to the soil to kill weed seeds after they have germinated.
Contact killers are chemicals that are sprayed or sprinkled on undesired plants.
Contact killers are chemicals that are sprayed or sprinkled on undesired plants.
Translocated chemicals interfere with the metabolism of the plant and cause its death by absorbing into the plant.
Translocated chemicals interfere with the metabolism of the plant and cause its death by absorbing into the plant.
It is safe to use a sprayer for other purposes even after rinsing it if a persistent weed killer has been used in it.
It is safe to use a sprayer for other purposes even after rinsing it if a persistent weed killer has been used in it.
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Study Notes
Risks of Chemical Weed Killers
- Chemical weed killers can pose health risks to humans, pets, and beneficial organisms in the garden.
- There is a potential for chemicals to unintentionally damage valuable plants nearby if not applied carefully.
Purpose of Chemicals in Agriculture
- Chemicals are used in agriculture and institutional landscaping to save time and reduce labor costs associated with manual weed control methods.
Contact Killers
- Contact killers are herbicides that act on contact with undesired plants.
- These chemicals kill weeds by being sprayed or sprinkled directly on the foliage.
Consequences of Misuse
- Not following label directions with chemical weed killers can lead to ineffective treatment and increased risk of harm to non-target plants and the environment.
Pre-emergence Controls
- Pre-emergence controls involve applying chemicals to the soil to target and kill weed seeds before they germinate.
- This technique is used to prevent weeds from establishing in the garden.
Caution with Chemical Contact
- Care must be taken to avoid contact between herbicides and desirable plants to prevent accidental damage.
- Always target only the weeds intended for elimination.
Misconceptions about Safety
- It is a misconception that all chemical weed killers can be safely used in established plantings without risking harm to other plants.
- Some chemicals can have residual effects and damage surrounding vegetation.
Translocated Chemicals
- Translocated chemicals enter the plant and disrupt metabolic processes, leading to the plant's death.
Sprayer Usage after Chemical Application
- Using a sprayer for other purposes is not safe unless thoroughly rinsed after using a persistent weed killer.
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