root rot

noun Plant Pathology.
a symptom or phase of many diseases of plants, characterized by discoloration and decay of the roots.
any disease so characterized.

1880–85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To root rot
Example sentences
For such a destructive organism, the root rot created amazing, beautiful
  patterns in the wood.
Using a doctors stethoscope and hammer required little effort to check trees
  for root rot.
Chickpea seeds are always treated before planting to control damping-off and
  root rot.
The scientists found no root rot in either cultivar.
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