Does anyone know what can be done to prevent root rot in cassava (Manihot esculenta)? What I have seen on-line indicates that most of the rots are caused by fungus. I have some friends growing some in their yard and the roots are rotting. The soil is sandy and well drained, but the lawn is watered all the time and I see nematode issues on a lot of the other plants in the yard. So, I am thinking that the nematode damage is creating an entrance for fungus that is causing the rot. Any other thoughts?