I know snow mold causes frustration for others, but we have to understand that we can learn something from it."
It also is never too late to review management practices for pink snow mold. Pink snow mold thrives in temperatures between 35 degrees and 50 degrees Fahrenheit, and isolates can grow in shade in June with temperatures as high as the upper 60s, Clarke said. The pathogen also tends to be more active in high-pH soils. He warns not over fertilize late in fall because the pathogen also thrives when late-autumn turf is lush and succulent when it should be going into dormancy. Clarke recommends two preventive applications of a tank mix of two or more fungicides three weeks apart in late fall. Although there are not resistance issues with pink snow mold like there is with dollar spot control, some of the older chemistries Not tremendous resistance issues, like with dollar spot, some to some of older chemistries like benzimidazole are not as efficacious as they once were, so rotating chemistries is a must. Tank mixing improves efficacy since different strains react differently to different chemistries, Clarke noted. "Strobilurins and DMIs together work well for us," he said. "If you put them out alone, often you don't get control. There are multiple strains, and when you put them together they seem to take care of all the strains." That should be enough until spring, when a subsequent application should be made to bridge the gap until temperatures climb. Some areas, however, including mountainous regions and the Pacific Northwest often have conditions conducive to year-round pink snow mold activity. While preventive fungicide applications in late fall and the use of covers can help prevent snow mold from appearing on putting greens, it is possible to have too much of a good thing, Clarke said. Rutgers research shows that while permeable covers can help in the fight to manage pink snow mold, two covers atop one another traps moisture and results in increased incidence of the pathogen. When Nangle went scouting for snow mold activity in advance of the field day conducted with ATI colleague Zane Raudenbush, Ph.D., and David Gardner, Ph.D. of OSU's main campus in Columbus, he found very limited activity. But when some is spotted and the potential for damage is real, he reminds superintendents that it is important to stay in front of the problem with golfers and members. "Use all methods necessary to communicate," Nangle said. "Go to the USGA. Go to your local golf association. When it's a rough winter, it's a rough winter for everybody. There is going to be some damage and you have to communicate that to your membership. Make sure everyone knows what is going on, because they'll think it is only happening to them."
- Read more...
- 5,147 views
