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Mechanisms of Herbicides
Target Grade: 9-14
Student will transplant grasses and weeds into flats and /or pots. After acclamation time, they will investigate how and why different plants are killed by different chemical herbicides. A simultaneous microbiological proof with seed plates will be run. Each group will choose two natural products and design a simple experiment to compare chemical vs. natural weed killers. A round table discussion including all designs, results, comparisons and possible environmental problems will summarize the exercise
This exercise is designed to show:
- 1. The effectiveness of the different categories of chemical herbicides
2. How these different chemicals work
3. Which are the Best weed killers
4. Their possible environmental impact
- Instructor Manual
- Methods of Assessment Manual
- Material Safety Data Sheets
- Student Observation Data Sheets
- Student Lab Set 1 & 2
- Student Data Sheet A
- Student Data Sheet B
- Rock Salt
- Spray Bottles
- Petri Dishes
- Strips of Bibulous Paper
- Nutrient Agar
- Nutrient Broth
- Sterile Applicators
- Weed Stop