Any idea what this is or what is causing it? (and better yet how to kill it) It seems to crop up overnight every few days. There seem to be two types the yellow and the orange. The yellow seems to be more frequent. The texture is very wet and gooey. When I shovel it out I find yellow flecks (spores?) in the mulch below, but it don't seem to see them in the soil. As an aside I have not seen any in my big pile of excess mulch pile.