Viridescent - the Asian Turfgrass Center blog

Sunshine, Zoysia, and Grass Performance in Asia

There are four grasses in the image above (click on it to get a larger view). We are looking at Tifeagle and Novotek (both are Cynodon hybrids), Sea Isle Supreme (Paspalum vaginatum), and a fine-bladed zoysia, probably Zoysia pacifica. This is a test on a shaded green in Manila. The green is maintained for seashore paspalum. The seashore paspalum can handle this shade, although it has a relatively coarse leaf blade compared to the zoysia. Both types of Cynodon fail to produce an acceptable putting surface in this type of shaded condition under which both seashore paspalum and zoysia can produce a good stand of turf.

In fact, this zoysia produces a really superb putting surface, as seen at right, a photo I took on the 18^th green at Wack Wack Golf and Country Club during last week's Philippine Open. It requires very little in the way of fertilizer, few pesticides, and is able to tolerate the low sunshine levels and tree or building shade that can cause Cynodon, with its higher light requirement, to fail. Wack Wack recently underwent a renovation and the Club made a wise choice to keep the native zoysia on greens and the native carpetgrass everywhere else. There are beautiful mature trees across the property, and other grasses would not produce such fine surfaces in these low light conditions, but the zoysia and Axonopus thrive.

Many people ask me "what type of zoysia is that?" My best answer is that it is probably a type of Zoysia pacifica (previously called Zoysia tenuifolia), and I base that on a paper published in 2005 by Akamine et al. in volume 33 of the Journal of the Japanese Society of Turfgrass Science entitled "Morphological Characteristics of Zoysia tenuifolia Willd." In the research project reported in that paper, Akamine et al. found that Z. pacifica leaves are folded in the sheath, as compared to Z. matrella leaves which are rolled in the sheath. Upon close inspection, I found that the fine-bladed zoysia from the greens at Wack Wack has folded leaves, while the leaves of a typical Zoysia matrella from Japan were rolled.

For more information about sunshine, shade, turfgrass performance in Asia, and links to a lot more information about assessing the sunshine hours close to your location, here is a video I've recorded with Dr. Larry Stowell from PACE Turf about light.

A Report From the 2011 Golf Course Maintenance Management Conference

I've participated in many turfgrass seminars and conferences in the Philippines, and last week's Golf Course Maintenance Management Conference was the best so far. With 130 attendees, the conference room at The Orchard Golf and Country Club was filled to hear the presentations from Roberto "Boy" Escaño about drainage, from Siam CC's Sittichai Dusadeeporn about tournament preparation, and from Buddy Resurrecion on rules, maintenance, and marking the course. I also spoke about warm-season grasses and their adaptation to the Philippines climate, utilizing this chart to demonstrate some unique aspects of the climate in Southeast Asia that lead to better performance for Zoysia and Axonopus species compared with bermudagrass or seashore paspalum.

The conference was organized by the Philippine Turfgrass Association in cooperation with the Federation of Golf Clubs Philippines and the Asian Golf Industry Federation (AGIF). Delegates included golf course superintendents, managers, and owners, along with others who work in the turfgrass and golf industries. The panel discussion covered a range of topics including how to optimize turfgrass performance in shade, what steps can be taken to publicize and promote golf in the Philippines, and how to encourange more people, and especially young people, to play the game.

A cocktail party at the close of the first day's sessions, sponsored by Hunter Industries, gave the conference delegates a chance to discuss many of these turfgrass and golf course management issues in more detail.

The second day of the conference saw field sessions on spraying and sprayer calibration, on aerification and organic matter management in the soil, and a practical seminar on marking the course, with special attention given to water hazards, lateral water hazards, and out-of-bounds. After lunch, the conference closed, with many delegates playing a round of golf on the Palmer Course at The Orchard, and others opting for a tour of the course, the golf course maintenance facility, and some of the innovative water harvesting and cleaning programs implemented at The Orchard.

A Plot of Cities Where Warm-season Grasses Grow, and more

I made the bubble plot above to see how the differences in temperature and sunlight and rainfall between cities would appear if plotted this way. The data are from climatological normals provided by national meteorological services and the World Meteorological Organization, collected in some cases from the climate section of a city's page on Wikipedia.

I made this plot for a few reasons. I saw a job posting for a superintendent position in Asia saying that experience working in a Florida-type climate would be desired, and I wanted to plot a few cities this way to see how cities in Asia compared with Florida. Someone also asked me if I thought it was more difficult to manage warm-season grasses in Singapore or in Florida, and I thought that a plot such as this might make my answer more clear. And I also notice as I travel that a grass that grows so well in Honolulu, for example, may not grow well at all in Bangkok. There are clear differences in suitability of grasses for different growing environments. And as I work with some new software, I saw a tutorial to make this type of bubble plot on the FlowingData website and I wanted to try it for myself.

When plotted this way with mean annual temperature on one axis and hours of sunshine on another axis (the area of the circle for each city is proportional to annual rainfall), one can see that the cities in Asia tend to have a higher annual temperature, have less annual sunshine than the cities plotted from the USA, and have substantially more precipitation. A quick look at the bubble plot shows that Singapore, for example, has about 60% the sunshine of Miami while receiving almost twice the rainfall. 

This doesn't tell the whole story about which grasses perform best in a certain area. We can also consider the winter temperatures, the summer temperatures, the timing of rainfall and dry seasons, etc., but simply plotting by temperature and sunshine tells us a lot. 

Turfgrass managers in Southeast Asia know that zoysiagrass (Zoysia matrella) and broadleaf carpetgrass (Axonopus compressus) thrive in this climate while bermudagrass maintained as a turfgrass struggles. This type of plot helps us to understand why. At the Marukatayawan Palace in Thailand, we see that zoysia grows in the sun and broadleaf carpetgrass covers the shaded areas under the trees.

These native grasses thrive when maintained as turfgrass in this region, while grasses such as bermudagrass which have a higher light requirement cannot compete with zoysia even in full sun. Why is that? Because even in full sun, there is still relatively little sunshine in Southeast Asia compared with Florida.

Philippine Turfgrass Association Meeting at Sta Elena

I had a great time last week at the 1^st Quarterly Meeting of the Philippine Turfgrass Association (PTA) at Sta Elena Golf Club in Laguna. The title of my presentation was Application of Turfgrass Science Principles to Improve Grass Conditions. I spoke about modifying the growing environment to create the desired playing characteristics, and we had an excellent discussion about organic matter management on greens, fertilization programs, timing of core aerification, and a range of other topics. Download the seminar handout here [PDF, 172 KB].

This seminar was pre-approved for GCSAA education points as many of the PTA members are also members of the GCSAA. Nicer Landas, CGCS, is the president of the PTA this year and is also one of the few certified golf course superintendents in Asia.

Sta Elena is one of the premier clubs in the Philippines and I had a chance to go around the course with superintendent Tim Walker in the afternoon. Walker gave an introductory presentation about the club, the grasses used, and explained how certain soil conditions and insects are particularly challenging to manage. The course is in excellent condition and the Tifeagle greens, which have been there for more than a decade and are some of the oldest Tifeagle surfaces in Asia, were superb. Like most of the courses built in Southeast Asia during the 1990's, Sta Elena GC is wall-to-wall bermudagrass. 

At Thailand it seems I often play off zoysia or seashore paspalum surfaces, and it was a treat to play off hybrid bermudagrass at Sta Elena. Do you see my ball in the fairway in the photo below? After a staggering drive over a ravine to place the ball there, I proceeded to hit my second shot (this is a par 5, by the way) over the green in the far distance, but I got it up and down for a birdie. I'd like to congratulate the course maintenance team at Sta Elena for producing such good conditions, obviously applying turfgrass science principles to improve grass conditions!

Speaking at Philippine Turfgrass Association Meeting March 3

I'm really looking forward to the upcoming first quarterly meeting of the Philippine Turfgrass Association to be held at Sta. Elena Golf Club in Laguna on March 3. I'll be speaking on the topic of Application of Turfgrass Science Principles to Improve Grass Conditions. The morning seminar program will be about the modifications that golf course superintendents can make to the growing environment for bermudagrass, seashore paspalum, zoysiagrass, or carabao grass in order to produce the desired playing surface. Click here to register for the meeting.

Collecting Dollar Spot With Dr. Tredway in Southeast Asia

Turfgrass pathologist Dr. Lane Tredway from North Carolina State University recently made a visit to Southeast Asia for the purpose of collecting dollar spot samples. From ATC's Thailand base, we went to Vietnam, Malaysia, and the Philippines to collect dollar spot from many different grass types: bermudagrass, zoysia, seashore paspalum, carpetgrass, creeping bentgrass — even from some sedges. There is not much creeping bentgrass in Southeast Asia but we traveled to high elevations to find it at Dalat in Vietnam, at the spectacular Mount Kinabalu Golf Club in Sabah (below), and at Camp John Hay in Baguio.

Dr. Tredway has chronicled this trip in a post entitled Dollar Spot Expedition to Southeast Asia on the Turf Diseases website. 

Dollar spot is ubiquitous and is especially so on seashore paspalum turf. This project looks at the different strains of dollar spot as they are found on different grass types and in different geographical and climatic areas. The idea is that a better understanding of the dollar spot pathogen itself will allow for the development of better control measures for this disease in the future.