| 1. Investigating allelopathy The production and release of substances by a plant that are toxic to neighboring plants is called allelopathy. Familiarize yourself with an allelopathic species in your area. Design an experiment to test which part of the plant is most toxic. Be sure to have your teacher approve your procedure if you plan on carrying out your experiment. |
2. Invasive species Research an invasive species in your area. Report your findings to the class. |
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| Allelopathy benefited the sunflower growing in the wild. It reduced competition for nutrients, water, and sunlight. However, allelopathy works against sunflower crops. Sunflower crops must be rotated to avoid buildup of the "poison" in the soil. |
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