About 80% of the population is allergic to the oily resin urushiol, the compound found in poison ivy that causes dermatitis — a burning, itching rash. Reactions to poison ivy range from mild to life-threatening, and I am among those who have ended up in the ER due to poison ivy exposure. As this three-leaved menace is in its peak season, I am revisiting my conversation with Dr. Susan Pell, a botanist with a deep expertise on the family of plants that poison ivy belongs to.
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The joe gardener Show - Organic Gardening - Vegetable Gardening - Expert Garden Advice From Joe Lamp'l