Toxic Black Walnut

Walnuts may not be as well-known as almonds or cashews, but they are nevertheless widely consumed. Despite the fact that walnuts want you and everything around you to perish. If you've ever seen a wild walnut, you'll know that the nut comes off the tree coated in a green husk. When you start peeling the husk to get to the nut within, a foul smelling fluid appears that quickly turns brown. This is known as juglone.

Juglone is known as prejuglone inside the walnut and the tree. It's clear and very safe. However, once in the air, it oxidizes and becomes poisonous. Juglone is a poisonous substance that can kill both plants and animals. Few animals can safely consume it, and plants that grow near a walnut tree will perish when the tree's roots leak the fluid, not to mention any leaves or nuts that fall from its branches.

Juglone sensitivity varies, however it can be highly dangerous for certain individuals. Even coming into contact with particles from walnut wood being chopped nearby might trigger skin rashes and welts. Breathing it in can cause respiratory problems, and ingesting it can trigger cyanide-like symptoms.