Keys to Cotton Root Rot by Trees Are Key published on 2019-11-07T14:49:12Z Trees Are Key Welcome to Episode 237. Last week we explored how “#TeamTrees is Key” and this week we let’s discuss “Keys to Cotton Root Rot”. This week’s focus is a silent killer affecting over 2000 species that goes by several aliases. Let’s delve a little deeper and take a close look as this small, but deadly microorganism. Species Spotlight The Texas Ebony, Ebenopsis ebano, aka Ebony Blackbead, or Ebano, or Ebony Apes-Earring is a famous tree of Texas. The border town of Los Ebanos, Texas, is named for the ebony tree that serves as an anchor for the last hand-pulled ferry across the Rio Grande.