Question
HI,

Planted mondo grass at the beginning of the summer and it took off great.  However it has started to yellow and disappear.  What is it and what do I do??  Help!!  I live in louisiana.

Answer
Hi dusty,  The most serious disease of mondo grass is root rot
caused by Pythium splendens, which affects dwarf
mondo more than the long-leaf varieties. Symptoms
begin as tip burn followed by gradual yellowing and
browning. Eventually the crown will easily separate from
the base when gently pulled. Heavy soils and poor drainage
promote outbreaks of this disease. The soil-borne
Pythium is difficult to control, but there are some fungicides
labeled for drench application to mondo grass. Topdressing
with compost may also help, because it improves
competitive soil microflora populations.  kathy