In parts of the Caribbean, particularly in wet districts, arrowroot sometimes suffers from a rot caused by Rosellinia bunodes.    From Wordnik.com.  [Chapter 10] Reference

Rigidoporus lignosus (white rot, white thread), Rosellinia necatrix (black rot), Corticium rolfsii, and a number of others of lesser importance.    From Wordnik.com.  [Chapter 11] Reference

Rosellinia bunodes.    From Wordnik.com.  [Chapter 37] Reference