Blue green Algae on greens

Blue green algae developed on our greens over the last couple of days.  Most of this occurrance was along the edges but did come out onto the main greens surfaces after the heavy rains on Sunday/Monday and warm temperatures.  We were at the end of a normal spray cycle on our greens along with the combination of high environmental pressure which caused the outbreak.  We sprayed yesterday for our normal greens application and did a light topdressing which will help alleviate some of the symptoms.  As the greens begin to dry, the algae becomes less prevalent.    We plan to have the greens hydro-jetted after the Invitational which is a machine that vents the top of the green to a depth of 3-4" with a water jet at about 3000psi.  Great machine and a very non-disruptive practice that will assist our greens in drying on the surface more quickly.  This algae also can become prevalent where mowers scalp turf dies which opens up the surface for the algae to move into that area.  Allowed to go unchecked, the algae can weaken the plants.  For the most part, the algae is more of a cosmetic problem for us than a permanent issue.

Blue-green algae on the edge of the putting green.