Chemical Warfare

See if you can find as examples of chemical plant defenses: Poison Ivy, Mint, Milkweed, Wood Sorrel, Spicebush, Sassafras, Walnut. Can you find leaves that give evidence of herbivores trying to evade chemical defenses[see p151]?

Walnuts and alianthus trees are famous practioners of allelopathy[105]; locate one and see if you can determine the boundaries of its chemical influence.