brown patch
Dollar spot-8
Light at the end of the tunnel (e.g., It's August)
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It’s been a busy week for golf course superintendents in the region as diseases are in high gear and the heat and temperature stress are causing many golf course putting greens to decline. We are hearing a lot of reports of yellowing and discoloration to bentgrass putting greens, possible nematode issues, and the typical diseases that we would expect to see at this time of the year. Rain storms that swept through much of the mid-Atlantic provided some much needed relief from the drought we were in, but in many cases the rain fell too fast and basically moved via...
Brown Patch-2
Hot
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Hello everyone. Wow, I can’t believe it’s the last Friday in August. Where has the time gone? Here at KSU we are gearing up for our field day which will be Thursday, Aug 4, over at the Olathe Horticulture Center (near Kansas City). For me, field day always indicates that there are only a few more weeks to get through before cooler temps set in. Here is a summary of recent high and low air and soil temps here in Manhattan: You can see we’ve had a lot of 100+ days. And, perhaps more importantly, we’ve had some very “high...
Brown Patch-2
Dr. Vincelli's Chemical Control of Turfgrass Diseases
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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...
Brown Patch-3
Lots o' Heat and Brown Patch
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Well it looks like most of the country is in the grip of this heat wave now. We are working on day 29 of days over 100 F for 2011. According to the Oklahoma Climatological Survey map, we average approximately 15 days per year over 100 F. Our record is 50 days and we haven’t even made it to August when we typically have our “hot and dry” weather. So….it is going to be a tough summer season again this year. In our diagnostic lab we are getting a lot of creeping bentgrass samples with high nematode populations and/or suffering...
Summer stress and diseases
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HOT HOT HOT We’ve been cooking over the past week. We are not as bad as Oklahoma. Just reading Damon’s post made me break into a sweat, both with the thought of those high temperatures AND the thought of the number of samples he’s dealing with. It hasn’t been quite that extreme just a bit north, where I am located. But, this current week has been nasty, with more 100+ on the way. Localized dry spot: This photo was sent in with a subject line that said “Help!!!” While I am not a fan of diagnosing based only by photo,...
Heat Wave Forecasted for Next Week
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We have seen relatively few disease issues in the TDL the past month or so. Throughout Upper Midwest temperatures have been warm, but we have also been quite dry. However the forecast for next week is very different. Highs for next week will been in the low to mid-ninties, more importantly night time temperatures will exceed 72 for most of next week. I included a 7-day forecast from NBC 15 here in Madison, but areas west and south of us will likely experience even hotter temperatures. I know that doesn’t compare with the excruciating heat experienced by those in the...
dollar spot, brown patch, a bit of heat, and what do you do when you don't have a sprayer?
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Hello, I am back in the US after an agriculture development trip to Tajikistan. If any of you are curious about that, you can check out this website where I have some notes and photos. The photo above is me with the Tajikistan-Afghanistan border mountains in the background.. . https://picasaweb.google.com/mmkennelly/TajikistanVisit2011?authkey=Gv1sRgCMvxxJn_moCCKg . .Anyway, back here on the home front dollar spot is active in putting greens and fairways. Though I have not seen it yet with my own eyes, I have had a few reports of brown patch activity as well. In addition, with some of the recent heat and wind...
A Cornucopia of Disease in Southeast Asia
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I sometimes find such healthy grass that I have little disease to write about, but this week was an exceptional one. I went from Kanchanaburi to Bangkok, Singapore, and Da Nang, seeing a number of grasses and on them an assortment of pathogens. Click the thumbnails for a full-size image and description. If there were an award for diseases, seashore paspalum would win this week, with two different unidentified diseases and slime mold and dollar spot, with a bonus for some extraordinary drought stress. In the image below, there is an unidentified patch disease and dollar spot on a seashore...
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