June 29, 2012 Scouting Report
June Ends HOT: 1st Type 2 Fairy Ring on Greens, Dollar Spot Jumps After Rain, Japanese Beetles Build, Peter's 1st Dollar Spot Data and Tim says Tall Fescue
Chicago/Northern Illinois Update: Derek Settle - DSettle@cdga.org / Weather Blog
Summer just got Record Super Hot. Until now we have been praising our cool-season turf for its deep roots and good color. "Good, nice, wow, terrific." And in response our turf has listened by glowing green and blemish free (given supplemental irrigation). This week things started to change. Peak summer heat entered our Midwest sky above (early) as an ominous forecast of 90s to 100s for highs strung themselves together. Accordingly we began to see signs of plant stress and our miniature boat-shaped leaf blades on greens, Poa annua, gave its first whelp of summer.
This recent amber hue is now commonly occurring on Poa greens in Chicago, yet for the average eye all is well and the putting green looks fine. However, for superintendents this all-to-familiar-look means normal plant physiology of fine turf is no longer the same. On golf surfaces, physiological decline has begun and touche, in response they're moderating maintenance on greens. On especially hot days we back off. As far as ball roll or those green speeds you won't be able to tell as natural plant growth regulators are now in place - high temperature, midday wilt stress and high light levels. With plant growth next to nil careful inventory and evaluation of habitual stressors begins. Like the extra mechanical wear which always rings the cleanup laps of greens. Like traffic patterns on turf (the stressful effects of concentrated foot traffic on greens, and harsh traffic patterns of carts on fairways/roughs). Talk about a hot summer huh. Well it is!
Click here to view the June 29, 2012 Scouting Report.
Have a nice weekend and enjoy your 4th of July. Thankfully rain seems to have returned.
Derek Settle, PhD
Director of Turfgrass Program
Timothy A. Sibicky, MS
Manager of Turfgrass Research