For mulch producers, two of the greatest threats to profitability are mold and fungus. These creeping organisms can be difficult to eradicate and threaten the viability of your entire mulch supply. The bird’s nest fungus, the “stinkhorn” and the “dog vomit” slime that can spread on mulch surfaces may all be familiar to landscape mulch producers. But there’s one kind of fungus that can be particularly troublesome: the artillery fungus. This pesky intruder causes headaches for producers, mulch applicators and homeowners alike. Here’s what it is, why it’s so harmful and what you can do to stop it.