Arterial Fungus On Siding

If the spores are fresh sometimes soap and water with a scrub brush will remove a bit of the fungus.

Arterial fungus on siding.

How to clean fly poop or possible artillery fungus stains. Artillery fungus orients itself toward bright objects such as light colored siding windows or shiny automobiles parked nearby. Power washing may work on brand new only vinyl siding that still has a shiny oily sheen. When it is time for it to reproduce the fungus lives up to its name and shoots tiny spores in all directions.

The black tar like spots that are all over your vinyl siding are more than likely a fungus called sphaerobolus stellatus better known as artillery or shotgun fungus. The worst thing about this fungus is that it shoots spores up to 20 feet which often land on siding cars and anything else that surrounds the mulch. These sticky black dots cling to vinyl siding like glue. The lady called us out in a job today to have us take big poop off her siding.

There is no fungicide registered as an artillery fungus treatment. Its primary job is to decay dead wood. As you have discovered the spore mass is difficult to remove without damaging the surface. The fungi eject the sticky spore mass which can be blown by the wind as high as the second story of a house.

Although it s most often found on the east coast it can grow anywhere and especially thrives in areas that have cool damp springs or rainy fall weather conditions. You can power wash them off of vinyl siding but such methods can be damaging to cars and wood siding. The artillery fungus or shotgun fungus is a wood decay fungus that likes to live on moist landscape mulch. We have not found a good efficient way to get them off without leaving a stain or damaging the siding especially on old dry siding.

There is no recommended artillery fungus treatment.