 And when all those three things are there, that's when we can have a disease problem show up. He tells Brownfield the pathogen is what causes the disease. A microorganism could be a fungus that's out there, and that's what the pathogen is. It's present there in the field. Sometimes people do some tillage or rotating or things like that, so it really doesn't impact what's out there. But that pathogen has to be present. And then the environmental conditions, we talk about moisture and heat.