Posted by John Kaminski at 4:18 PM Thursday, July 21, 2011 Labels: anthracnose , fungicides , northeast , tebuconazole
For those of you who have not yet seen this reference from Dr. Paul Vincelli at the University of Kentucky, you will be excited about this post. Dr. Vincelli has been pulling data from the Plant Disease Management Reports (formerly F&N Tests) for a number of years and he continues to update this reference each year. I have to say that it is one of the best references available that continues to provide current fungicide recommendations based on field research conducted throughout the United States.
Access the original Chemical Control of Turfgrass Diseases 2011 here. (current disease update below)
Vincelli Fungicide Chart
Update on diseases this week:
Brown patch and Pythium blight are very active in the mid-Atlantic and northeastern US at the moment as would be expected. Anthracnose also appears to be making some inroads on annual bluegrass putting greens. A big decision has been whether to apply the DMI fungicide tebuconazole (Torque, QP-Tebuconazole, others?) during the summer heat. This has consistently been one of the most effective anthracnose products in trials throughout the US. In our trials this year, we have not had any significant injury or regulation from repeated applications of tebuconazole, but I will note that our site is not as hot as others in the region AND we are not applying any growth regulators in our trial area. I don't have an answer as to whether you should apply it or not, but I guess it would depend on how much Poa you have, how healthy your greens currently are, and how bad your anthracnose is.