While producing this substance benefits the black walnut tree by limiting competition, it harms other vegetation, causing yellowed, wilted leaves and ultimately death from being exposed to juglone.

With most trees, it’s best to let fallen leaves remain where they lie, but you can further reduce the concentration of juglone in the soil around a black walnut tree by keeping the area clean.

There are five invasive diseases that Michigan residents should be aware of and keep an eye out for. These species have the potential to harm Michigan’s natural resources. Four of them have been ...