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Showing posts with label decline. Show all posts
Showing posts with label decline. Show all posts

Top Five Diseases of Warm Season Turf at the 2011 GCSAA Education Conference


What's the Biggest Problem for Warm Season Turf?


Dr. Phil talkin' about Diseases on Monday

Last Monday, Phil Harmon, Megan and I got to teach the Management of Diseases of Warm Season Turfgrasses here in Orlando.

It was out third time doing it together and I think each time we’re getting better. I think Bruce Martin from Clemson has stopped checking up on us to make sure that we’re doing the class right, which is good, but we sure do miss the opportunity to put Bruce on the spot! Bruce taught the class previously for >10 years at GCSAA, and it took three of us to replace one of him!

This year we had about 45 students with Florida heavily represented in the group. We had some visitors from Central America and as far away as Australia, but most of the guys came to talk about bermudagrass and bermudagrass diseases in the southeastern U.S.

A survey taken during the class showed the disease issues that superintendents are most concerned with for warm season turf (by # of mentions):
1. Fairy Ring (22)
2. Rhizoctonia zeae aka mini-ring (18)
3. Large Patch (15)
4. Gaeumannomyces Decline (11)
5. Bipolaris Leaf Spot/Melting out (7)

Surprised?

We’ll follow up in the next few weeks on these diseases and what’s the best management strategies for each of them.


Until next week, signing off from the right coast....

Widespread Death & Destruction in Portland? No. Beer and Doughnuts? Por supuesto.


As you already know, many of the plant pathologists in the U.S. were in Portland this last week at the American Phytopathology Society meetings. As mentioned last week - Phil Harmon (Florida), Bruce Martin (Clemson) and Shanna Mazurek (North Dakota State) joined me on a quick tour of Portland Golf Club and Waverly Country Club on Saturday morning before the meeting. With temps in the 100s earlier in the week and a lot of wall to wall annual bluegrass - I was expecting to see nothing but brown up here. Arriving at PDX - I could see lots of dead grass from the air. However, on Saturday morning, I was very (pleasantly) surprised to see awesomely good course conditions at both Portland GC and Waverly CC. Thanks again to Forrest Goodling and John Alexander for the day and Gordon Kiyokawa for setting us up.


Forrest Goodling (Portland GC) - it was so hot recently that the thermometer couldn't even keep up with the 100+ degree weather.


The view of the club house at Portland GC - watching the weather and timely irrigation kept the Poa green during the hot hot heat.


Bruce, Shanna and Phil on the Willamette River - you can see what happened to a lot of grass in the PNW during the heat wave if it wasn't cared for.


John Alexander (Waverley CC) "schooling" Bruce on annual bluegrass and billbug damage.


John Alexander showing off some of the wickedly sloped (and fast) greens at Waverley.

Overall it was a great time seeing the courses and having Forrest and John share with us their experiences and expertise on turfgrass in Portland.

APS Annual Meeting (www.apsnet.org)
As far as the meeting - I have to admit, I did not spend all of my time discussing turf while there. I was mainly wearing one of my other "hats" and focusing on new fungicides and fungicide resistance development in agricultural crops. I am hoping that Megan can give us a summary of some of the cool turf stuff (other than what Jim already mentioned yesterday about the work being done by Steve Kammerer and Phi Harmon) from the meeting.

Two things to note (1) just to make things even more complicated, the name 'Chrysorhiza' is going to be more frequently associated with 'Waitea' and 'brown ring patch' - but for good reason (2) I'm "officialy" going to be working more and more with the EPA in Washington DC on fungicide resistance issues starting in January as part of a fellowship and sabbatical in 2010. More to follow on both in the weeks to come.

Beer and Doughnuts
Portland definitely lived up to its reputation for beer and doughnuts on this trip. With over 100 microbreweries - I tried my best to sample as much of the local brew as possible. One night was even punctuated with a late night run to Voodoo Donuts - I wish I had some better pictures - but unfortunately - all my iphone camera could capture in the dark were images like the one below - but the picture does the situation justice. After a very very very long day of plant pathology talks and a few microbrews - my own world pretty much looked like what was captured by this camera.


Paul Koch (Univ. Wisconsin), Lane, and Damon Smith (Oklahoma State) out on a late night donut run. Missing: Brandon Horvath (Tennesee) holding a big pink box (of doughnuts).

I'm very lucky to be working with such a great group of turf pathologists from around the country, they really do play hard and work harder. Most importantly - it was a great meeting and opportunity to discuss turf disease issues from across the country.

Meanwhile, Back in Cali....
Naveen has definitely been using the bat-phone this week. She reports that the diagnostic lab is getting slammed in Riverside. Anthracnose and heat stress are very common on cool season turf. Root infecting diseases like Kikuyugrass/Bermudagrass decline and soil diseases like fairy ring are also showing up because of the effects of summer stress. I think the blast of heat we had in a few locations is catcing up with us.

Weather wise - it's definitey cooled down this week (no Pythium alert outside of Coachella), but still expect to see the typical summer diseases inland and dollar spot/brown ring patch on the very moderate coastal locations (70s-80s).

Signing off from Top-Pot Doughnuts in Seattle (that's another story),

- Frank

Kikuyugrass: a California speciality


American Golf Kikuyugrass Summit
Last Monday I had a chance to particpate in a mini-summit on Kikuyugrass management for American Golf Superintendents organized by Scott Bourgeois. Kikuyugrass (Pennisetum clandestinum) is a warm season turf species both considered a noxious weed by some and also a perfect turf species for parts of southern California. It's very common in coastal regions of southern California and is the primary fairway and rough species at well known courses such as Torrey Pines Golf Course in San Diego and Riviera Country Club in Los Angeles. Native to East Africa, it was introduced to California from Australia for erosion control and spread quickly in southern California. Although common here as well as parts of Central and South America It's virtually unknown outside of southern California in the U.S. Most superintendents unfamiliar with the species often remark: "It looks like bermudagrass on crack", as kikuyuygrass often produces thick, agressive stolons.

http://www.usga.org/turf/green_section_record/2003/july_aug/kikuyugrass.html

The good things about kikuyugrass include: color retention under cool weather, aggressive growth and drought tolerance. The bad things include: the need for regular vertical mowing and thatch removal and its susceptibility to diseases like gray leaf spot, decline, and large patch.

The morning was kicked off with a tour of Riviera with superintendent Matt Morton that had been arranged by Matt Marsh (Marbella Golf & Country Club). I, being the chronic procrastinator, skipped the Riviera tour and ended up at a coffee shop on Sunset prepping a talk on Kikuyugrass diseases, where I bumped into USGA Agronomist Pat Gross on his way to Brentwood Country Club. (Life lesson: don't cheat on your girlfriend/wife, you never know who you're gonna run into).

The group then met up at Mountaingate Country Club where we spent the next few hours discussing Kikuyugrass diseases and fertility requirements and heard about Mike Wolpoff's (Seacliff Country Club) experiences with Revolver programs to remove cool season turf from Kikuyugrass fairways and roughs. The day way rounded out by a course tour with superintendent Robin Henry who shared a number of bunker rennovation tips with the group.

Overall - it was a great day sharing tips and tricks about kikuyugrass with a diverse group of southern California superintendents.

The next day, I packed up my bags to travel to Farmlinks in Sylacauga, Alabama. It's been great to see all of the research here and innovations from BASF, Toro and Agrium (as well as some very lush bermudgrass and zoysia here). More about that next week.



Martin Howard (Trump National) being eaten alive by Zoysia Patch at Farmlinks

Signing off from Farmlinks,
Frank
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