Mike Coker and son Troy work on golf courses ... - Backed By Bayer
Mike Coker and son Troy work on golf courses ... - Backed By Bayer
Mike Coker and son Troy work on golf courses ... - Backed By Bayer
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
SOLUTIONS<br />
PEST MANAGEMENT<br />
Pests We Love<br />
toHate<br />
Dollar spot: The Rodney Dangerfield of turfgrass diseases<br />
<strong>By</strong> J.M. Vargas Jr.<br />
Dollar spot, caused by Rutstroemia<br />
floccosum (formerly Sclerotinia<br />
homoeocarpa), is <strong>on</strong>e of the most<br />
widespread of all the turfgrass<br />
diseases. It was known for many years that the<br />
dollar spot fungus was not in the genus Sclerotinia.<br />
But its identity remained a mystery<br />
because we traditi<strong>on</strong>ally identified fungi<br />
based <strong>on</strong> the spores they produced.<br />
Because the dollar spot fungus does not<br />
produce any spores, positive identificati<strong>on</strong><br />
could not be made until the advent of DNA<br />
technology. <strong>By</strong> using its genetic informati<strong>on</strong>,<br />
the dollar spot fungus was determined<br />
to be in the genus Rutstroemia. The floccosum<br />
species name is derived from the fact<br />
that it produces fluffy mycelium.<br />
Although we refer to the pathogen that<br />
causes the disease as R. floccosum, it is made<br />
up of subgroups — similar to how creeping<br />
bentgrass is <strong>on</strong>e grass species, but has many<br />
different cultivars. The dollar spot fungus’<br />
subgroups are called vegetative compatibly<br />
groups (VCGs). Some of these VCGs occur<br />
in cool weather <str<strong>on</strong>g>and</str<strong>on</strong>g> others in warmer<br />
weather. We even have a new <strong>on</strong>e in the<br />
www.bayer<strong>golf</strong>advantage.com Golf Advantage 35