How Do I Remedy A Fusarium Infection From Soil

Q: I believe I have a fusarium infection in my garden soil. Plants start out healthy but quickly wilt and discolor. Is soil solarization an option? 

A: Fusarium is a root disease that is hard to eliminate from soil. Solarizing (covering the soil with clear plastic for two months) might be useful sometimes but it means your garden is taken out of action all summer. In my experience fusarium is a disease associated with soil that stays moist too long. If this is true in your case, this winter consider tilling in an inch-thick layer of very gritty sand to a depth of ten inches.