Here in Kansas we see our most severe large patch symptoms in spring, but we can see it in fall, especially if conditions are cool and wet. Here, also, we’ve had pretty good success at suppressing spring symptoms with applications the prior fall.
We at KSU and others have been busy trying to tackle this disease in recent years, especially with the increasing interest in zoysia. For a review of research across the transition zone you can check out this article in Golfdom:
In terms of varieties, like other universities, KSU does a lot of screening of new breeding lines and existing cultivars. In our research plots we like to have big blocks of different cultivars for different reasons. In my fungicide trials, often I like to use susceptible varieties to make sure we get strong disease pressure. For other types of studies we like to use more resistant varieties when developing reduced-input integrated management strategies.
Here is an example of two varieties out on one of our research greens. They have not been sprayed, and they are not in use at the moment, but they show the striking differences in susceptibility:
I also noticed a tiny bit of lingering brown patch on our putting green. When we switch more solidly into cool fall weather that should fade into nothing. Ah, fall! Let’s have more nights in the 50’s!
If you squint hard, you’ll see the big brown patch circle among all the dollar spot:
At the Kansas Turf Conference on December 4, 5 & 6, 2018 in Topeka we will have a new booth in the exhibit area for YOU to show off your best innovations!
Do you have a piece of equipment that you hacked together on your own? Something that saves you headaches? Are you willing to share your idea? If so – send me a quick photo and description. I’ll display it at the booth, with credit to you.
How about a method? Do you have a special knack for motivating your crew or co-workers? Write that down, and we can share it.
What about an innovative way to reach out to customers?
If you have a special tip or trick you are willing to share, send it my way. You can email me at firstname.lastname@example.org
At the booth we’ll have people vote on their favorite innovation, with a special prize for the winner!
Fungi love wet, humid conditions. Parts of Kansas have received a lot of moisture lately.
Here are a few recent examples:
Brown patch mycelium on a morning with fog and dew. If you look closely you’ll see the lesions, too.
Here is some foliar Pythium mycelium from another wet site:
You can see the white mycelial threads if you look closely. Also notice how the turf is so matted down and soggy/greasy in appearance.
At this location they had just sprayed tebuconazole, so how did the Pythium keep on rolling? Well, as you might remember, Pythium is not a true fungus, and some fungicides just do not work on it. Fungicides in the tebuconazole family (the DMI fungicides, FRAC code 3) have no effect on Pythium – you might as well be spraying water. For a list of products that DO have efficacy on Pythium foliar blight you can check this reference (p. 23) http://www2.ca.uky.edu/agcomm/pubs/ppa/ppa1/ppa1.pdf
Conditions for both Pythium and brown patch “should” be ending soon, and cool fall weather alone acts as a natural fungicide to slow those 2 diseases down just as our cool-season grasses find themselves in optimal conditions to grow. Recovery and seeding season is right around the corner.
And, finally, after 4 inches of rains there were mushrooms everywhere:
Some mushrooms are associated with fairy rings, and there is some information about that HERE.
How do mushrooms pop up overnight? They are actually kind of pre-made, hanging out in the soil in a small egg-like structure. When moisture comes they can expand quickly, like one of those sponge-animals that expands when you put it in a bucket. There are lots of time-lapse videos out there that show mushroom growth – here is one example:
The KGCSA Legacy Scholarship offers educational aid to the children and grandchildren of KGCSA members. A $1,000 scholarship will be awarded. Applications are due August 27, 2018.
Eligibility 1. One or more of the applicant’s parents or grandparents must have been a KGCSA member for five or more consecutive years and must be a currently active.
2. The student must be enrolled full-time at an accredited institution of higher learning, or in the case of high school seniors, must be accepted at such an institution for the next academic year. Graduating high school seniors must attach a letter of acceptance to their application.
3. Past winners are ineligible to apply the following year. They may reapply after a one-year hiatus.
Criteria for Selection 1. Applicants will be evaluated based on academic achievement, extracurricular and community involvement, leadership and outside employment.
2. The student must submit an original essay of up to 500 words.
Continuing with our ongoing information about summertime turf stress, here is a great update from the USGA about the causes of stress and decline in the collar/perimeter plus a checklist of practices to mitigate that stress.
More and more golf courses and other landscape sites are getting involved with pollinator conservation.
Are you curious to learn more?
There are some workshops coming up on July 31 in Chanute and August 1 in Lawrence, presented by The Xerces Society for Invertebrate Conservation, the USDA Natural Resources Conservation Service (NRCS), and the Rush County Conservation District.
Here is the flier for more information – click this link to make the pdf file pop up:
Large swaths of Kansas are under drought conditions, and this week it’s only going to get worse.
We’ve talked a bit on the blog about irrigating turf, but what about our landscape trees? How can we keep them going under stressful conditions?
K-State has a set of resources to help you irrigate wisely and efficiently.
With water restrictions, it can be hard to know what to take care of first. Ward Upham provides some tips on how to prioritize watering in this week’s Horticulture News, in “Plant Triage and Watering.”