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Yukon
Bermuda vs. Riviera:
To show Yukon is better than Riviera is not the easiest thing
to do, as they actually are similar on many traits. However,
there are some sports-related traits such as DIVOT repair that YUKON
gets the edge over Riviera.
Read below for more information.
|
YUKON BERMUDA
PLANTING RATE:
2-3 lbs. / per 1000 sq. ft.
Both Riviera and Yukon
are only partially hulled - mostly unhulled seed that is then coated. Both of
the Oklahoma varieties naturally have tightly attached hulls that are difficult
to remove without damaging the seed. This also shows when we look at
establishment times - both of the Oklahoma varieties sprout and establish a few
days slower than the varieties developed in the southwestern USA. Riviera does
have one advantage once the seeds germinate - the Yukon seedlings sit and wait a
week plus before they start to expand and spread, while Riviera seedlings start
to move and stolonize sooner.
Look at
the data sets on the newly revamped
Yukon
tech sheet, and at
the NTEP site for full reports if you
need more details - some trial
locations for some specific traits Yukon
beats Riviera, other locations for some
traits Riviera beats Yukon and in most
trials they are side-by-side for most
traits. The same developer and
researcher bred both varieties at
Oklahoma State, so for many traits and
performance abilities they are fairly
similar. YUKON was developed with
financial backing from the USGA -
uncertain about Riviera. On the tech
sheets below, Yukon edges out Riviera on
most traits.
http://www.sroseed.com/Products/PDF/Yukon_TS.pdf
http://www.sroseed.com/find/showproduct.php?id=110
SHEAR STRENGTH
research done at
VIRGINIA TECH -
shear strength
shows better results for grass
varieties that don't give way when a
sports player turns fast on a
field. Weak or low ranked grasses
give way and tear, and the player
twists or breaks an ankle as his
cleats lose their grip on the
tearing grass. Greater shear
strength = much better for sports
field use, as the grass doesn't tear
and give way.
YUKON
is
much much better for shear strength
than Riviera which ranked way at the
bottom.
DIVOT REPAIR - this ties in with
recovery from wear and tear on a
sports field, as well as the
ability to cover up damaged
spots such as on golf tees and
fairways where a divot is ripped
out. YUKON beats out
RIVIERA for speed of recovery
from divot damage, a significant
trait for a sports facility.
In general Yukon is somewhat
finer and more dense than
Riviera, plus Yukon almost
always gets a somewhat higher
rating for darker green color
than Riviera.
Looking through the NTEP, as
well as other trials, and Leah,
John & Mike's personal
observations Yukon is finer,
denser and darker green.
Both varieties green up earlier
in spring than any other seeded
bermudas, with YUKON usually
greening up slightly earlier
than Riviera, depending on the
trials site.
YUKON is slower growing than
Riviera (needs less mowing), but
also slower to fill in with
initial seeding.
YUKON greens up 2 to 4 weeks
earlier in spring than Riviera,
while Riviera greens up 2 weeks
earlier than most other bermuda
varieties.
YUKON usually stays green longer
in the fall than Riviera – 2 to
4 weeks longer – this is more
noticeable in cooler climate or
transitional zones.
SEEDLING SALT Germination -
Yukon was in this trial, Riviera was
not as this was pre-Riviera
release. YUKON showed
significantly higher resistance or
tolerance to poor quality water as
seedlings.
WATER USE
- YUKON was in a trial with other
bermudas and zoysias before Riviera
was developed - a trial to show
ability to retain green color longer
under reduced irrigation. YUKON
and Princess both showed the ability
to maintain green turf color and
good turf rating under 25% less
irrigation water applied. The
trial in Arizona has not been
repeated, so it is unknown what
Riviera would show for this trait.
SPRING DEAD SPOT DISEASE
(this is a disease that has been
increasing in occurrence all over
the country the last 5+ years) -
Yukon has always shown better than
Riviera for having less disease.
Riviera is better than many other
varieties, but not as good as Yukon
for this disease.
In Spring Dead Spot articles, YUKON
is specifically one of the
recommended varieties due to it very
high disease resistance for this
organism.
http://www.turfgrasstrends.com/turfgrasstrends/article/articleDetail.jsp?id=68344
Oklahoma,
May 2005 Data
Spring Dead Spot Measurements in Sq.
Centimeters
|
Variety |
sq. cm |
|
Tifway |
0.0 |
|
Tifsport |
0.0 |
|
Midlawn |
0.0 |
|
Ashmore |
0.0 |
|
Patriot |
77.0 |
|
Tift No. 4 |
78.7 |
|
Premier |
93.0 |
|
Yukon |
125.3 |
|
Aussie Green |
304.7 |
|
Riviera |
401.3 |
|
Celebration |
571.0 |
|
Princess 77 |
708.7 |
|
Contessa |
848.0 |
|
Southern Star |
1161.0 |
|
Panama |
1168.7 |
|
MS-Choice |
1171.0 |
|
Transcontinental |
1337.0 |
|
Sunstar |
1347.3 |
|
Arizona common |
1348.3 |
|
Sundevil II |
1359.0 |
|
Numex Sahara |
1464.7 |
|
Sunbird |
1530.0 |
|
Mohawk |
1547.0 |
|
LSD @ 5% |
884.0 |
Mean Spring Dead Spot necrotic
patch (sq. cm.) during April 2000,
2001 and 2002. Plots were
inoculated with a blend of
Ophiosphaerella herpotricha
isolates KS107, KS112 and KS 188 in
Sept. 1997.
|
Variety |
2000 |
2001 |
2002 |
|
Yukon |
167 |
345 |
678 |
|
Patriot |
377 |
754 |
766 |
|
Tifsport |
473 |
927 |
996 |
|
Shanghai |
779 |
1207 |
1277 |
|
Riviera |
795 |
1116 |
1595 |
|
Mirage |
747 |
1626 |
1923 |
|
Blackjack |
751 |
1372 |
2035 |
|
Tifgreen |
486 |
1118 |
2125 |
|
Savannah |
717 |
1731 |
2186 |
|
Arizona Common |
622 |
1791 |
2221 |
|
Southern Star |
809 |
1753 |
2263 |
|
Sundevil II |
637 |
1555 |
2289 |
|
Blue Muda |
806 |
1835 |
2377 |
|
Sahara |
618 |
1734 |
2416 |
|
Sydney |
834 |
1257 |
2642 |
|
Tifway |
469 |
1133 |
2754 |
|
Pyramid |
1093 |
2417 |
2886 |
|
Majestic |
1081 |
2531 |
3096 |
|
Princess 77 |
1947 |
3727 |
3312 |
|
LSD @ 5% |
698 |
1096 |
1129 |
Turfgrass
Quality Ratings of Bermudagrass
Cultivars Grown at 11 Locations
in the U.S. Maintained using
"Schedule B"; 2005 Data
Turfgrass Quality Ratings 1-9;
9=Ideal Turf.
|
Variety |
Mean |
| Tifway (veg.) |
6.3 |
| Yukon |
5.8 |
|
Riviera |
5.8 |
| Princess
77 |
5.5 |
| LaPaloma |
5.3 |
| Sunbird |
5.3 |
| Southern
Star |
5.3 |
|
Transcontinental |
5.2 |
| Sunstar |
5.0 |
| Mohawk |
5.0 |
| Sundevil
II |
5.0 |
| Numex
Sahara |
4.9 |
| Arizona
Common |
4.9 |
| Panama |
4.9 |
| LSD @5% |
0.3 |
Turfgrass
Quality Ratings of Bermudagrass
Cultivars Grown at 9 Locations
in the Transition Region 2005
Data Turfgrass Quality Ratings
1-9; 9= Ideal Turf
|
Variety |
Mean |
| Tifway (veg.) |
6.7 |
| Yukon |
6.3 |
|
Riviera |
6.3 |
| Sunbird |
5.6 |
| Princess
77 |
5.6 |
|
Transcontinental |
5.5 |
| LaPaloma |
5.4 |
| Southern
Star |
5.3 |
| Panama |
5.1 |
| Sundevil
II |
5.1 |
| Sunstar
|
5.0 |
| Mohawk |
4.9 |
| Numex
Sahara |
4.9 |
| Arizona
Common |
4.5 |
| LSD @ 5% |
0.3 |
Spring Greenup Ratings of
Bermudagrass Cultivars Grown at 17
Locations 2005 Data Spring Greenup
Ratings 1-9; 9=Completely Green.
|
Variety |
Mean |
| Yukon |
5.1 |
|
Riviera |
5.1 |
| Tifway (veg.) |
5.0 |
| Sunbird |
4.3 |
| Sundevil
II |
4.2 |
| LaPaloma |
4.1 |
|
Transcontinental |
4.1 |
| Southern
Star |
3.9 |
| Mohawk |
3.8 |
| Panama |
3.8 |
| Numex
Sahara |
3.8 |
| Arizona
common |
3.7 |
| Prancess
77 |
3.4 |
| LSD @ 5% |
0.3 |
Summer Density Ratings of
Bermudagrass (Seeded) Cultivars
Grown at 12 Locations 2005 Data
Density Ratings 1-9; 9=Maximum
Density
|
Variety |
Mean |
| Yukon |
7.1 |
| Princess
77 |
7.1 |
|
Riviera |
6.8 |
| Sunbird |
6.3 |
| LaPaloma |
6.1 |
|
Transcontinental |
6.1 |
| Southern
Star |
6.0 |
| Panama |
5.9 |
| Sundevil
II |
5.9 |
| Sunstar
|
5.8 |
| Numex
Sahara |
5.8 |
| Mohawk |
5.5 |
| Arizona
common |
5.4 |
| LSD @ 5% |
0.4 |
Genetic Color Ratings of
Bermudagrass (Seeded) Cultivars
Grown at 18 Locations 2005 Data
Genetic Color Ratings 1-9; 9=Dark
Green
|
Variety |
Mean |
| Yukon |
6.8 |
| Princess
77 |
6.7 |
|
Riviera |
6.7 |
| Sunbird |
6.5 |
| Southern
Star |
6.4 |
| LaPaloma |
6.4 |
| Sunstar |
6.3 |
|
Transcontinental |
6.3 |
| Sundevil
II |
6.2 |
| Numex
Sahara |
6.2 |
| Arizona
common |
6.1 |
| Mohawk |
6.1 |
| Panama |
6.0 |
| LSD @ 5% |
884.0 |
Mean Spring Dead Spot Patch
Measurements of Bermudagrass
(Seeded) Cultivars Oklahoma,
May 2005 Data
Spring Dead Spot Measurements in Sq.
Centimeters
|
Variety |
sq. cm. |
| Yukon |
125.3 |
|
Riviera |
401.3 |
| Princess
77 |
708.7 |
| Contessa |
848.0 |
| Southern
Star |
1161.0 |
| Panama |
1168.7 |
|
Transcontinental |
1337.0 |
| Sunstar |
1347.3 |
| Arizona
common |
1348.3 |
| Sundevil
II |
1359.0 |
| Numex
Sahara |
1464.7 |
| Sunbird |
1530.0 |
| Mohawk |
1547.0 |
| LSD @ 5% |
884.0 |
Percent Spring Greenup Ratings of
Bermudagrass Cultivars Kentucky,
2005 Data
Spring Greenup Ratings
100%=Completely Green
|
Variety |
% |
| Patriot |
91.3 |
| Yukon |
85.0 |
| Tifway (veg.) |
75.0 |
|
Riviera |
66.7 |
|
Transcontinental |
45.0 |
| Aussie
Green |
42.3 |
| Tifsport |
40.7 |
| Sunbird |
37.0 |
| Panama |
35.0 |
| Contessa |
30.0 |
| Princess
77 |
29.3 |
| Numex
Sahara |
25.0 |
| Southern
Star |
21.3 |
| Sundevil
II |
21.3 |
| Arizona
common |
16.7 |
| Sunstar |
15.0 |
| Mohawk |
10.0 |
| LSD @ 5% |
27.7 |
|
Table 1. Winter kill, spring
greenup, genetic color, and
texture ratings for the 1997
NTEP Bermudagrass Trial at
Stillwater, Oklahoma in
2000. |
|
|
|
|
|
|
|
|
Winter Kill Ratings1 |
Spring Greenup Ratings2 |
Genetic Color Ratings3 |
Texture Ratings4 |
|
|
|
|
|
|
|
Entry |
5 April |
24 March |
15 May |
16 Aug |
|
|
|
|
|
|
|
AZ Common |
43.3 |
2.6 |
5.0 |
5.6 |
|
Blackjack |
28.3 |
2.6 |
5.6 |
6.0 |
|
Blue Muda |
35.0 |
2.6 |
5.0 |
6.6 |
|
Cardinal |
3.3 |
6.6 |
4.0 |
9.0 |
|
CN2-9 |
23.3 |
2.6 |
8.0 |
8.0 |
|
GN-1 |
46.6 |
2.3 |
8.0 |
6.3 |
|
Southern Star (J-1224) |
38.3 |
2.3 |
6.3 |
6.0 |
|
J-540 |
35.0 |
2.3 |
5.6 |
6.3 |
|
Jackpot |
30.0 |
3.0 |
5.0 |
6.6 |
|
Majestic |
41.6 |
2.3 |
5.3 |
6.0 |
|
Midlawn |
5.0 |
5.3 |
7.0 |
8.0 |
|
Mini-verde |
38.3 |
2.0 |
8.0 |
8.6 |
|
Mirage |
30.0 |
3.0 |
5.3 |
6.0 |
|
Numex Sahara |
33.3 |
3.6 |
5.6 |
5.6 |
|
OKC 18-4 |
18.3 |
2.3 |
8.0 |
7.0 |
|
OKC 19-9 |
13.3 |
2.6 |
8.0 |
8.0 |
|
Yukon
(OKS 91-11) |
18.3 |
3.6 |
7.0 |
7.3 |
|
Riviera
(OKS 95-1) |
15.0 |
3.6 |
7.3 |
7.0 |
|
Princess |
60.0 |
1.3 |
7.0 |
7.3 |
|
PST-R69C |
30.0 |
2.6 |
6.6 |
7.0 |
|
Pyramid |
48.3 |
1.6 |
5.0 |
6.3 |
|
Savannah |
33.3 |
2.6 |
5.3 |
6.3 |
|
Shanghai |
43.3 |
2.0 |
7.0 |
5.3 |
|
Shangri-La |
36.6 |
3.0 |
5.6 |
6.3 |
|
Sundevil II |
28.3 |
3.3 |
5.6 |
6.3 |
|
SW1-11 |
56.6 |
1.6 |
6.0 |
6.6 |
|
Sydney
(SW1-7) |
38.3 |
3.0 |
5.0 |
6.3 |
|
Tifgreen |
16.6 |
4.3 |
6.6 |
8.0 |
|
Tifsport |
23.3 |
2.6 |
8.0 |
8.0 |
|
Tifway |
20.0 |
2.0 |
8.0 |
8.0 |
|
|
|
|
|
|
|
LSD(p=0.05)5 |
12.2 |
1.1 |
0.7 |
0.7 |
1Winter
kill was rated on a 0-99 scale (0=no
winter kill, 99=loss of 99 percent
of turf area).
2Spring
greenup was rated on a 1-9 scale
(1=completely dormant, 9=completely
green).
3Genetic
color was rated on a 1-9 scale
(1=light green, 9=dark green).
4Texture
was rated on a 1-9 scale (1=coarse
texture, 9=fine texture).
5If
the difference between any two means
in a column is equal to or greater
than the LSD value, the means are
statistically different.
Comparing
YUKON & RIVIERA
for Northern / Transition Area use.
Yukon is also and excellent home lawn choice
and can be used in all WARM Growing areas where
Bermuda is normally planted.
PERFORMANCE
Yukon has expanded the
bermudagrass planting zone - it is the turfgrass
professional's top choice for projects from the
Equator to the Transition zones of the world. In
trials, it has shown excellent turf quality and
winter hardiness at both 0.5 inch and 1.5 inch
mowing heights. Yukon has consistently
outperformed other seeded turf bermudagrasses in
the NTEP trials, as well as other test sites
across the United States and overseas. Golf
superintendents, parks and sports field
managers, landscapers, as well as other quality
turf professionals will find this improved
turf-type seeded bermudagrass an advanced
performer. Yukon can be seeded on new
projects, as well as interseeded into existing
turf of similar quality. Highest ratings for
turfgrass quality, color, density and texture,
rank Yukon Bermudagrass as the best
choice for turf managers, wherever bermudagrass
is grown. Additionally, with its excellent
winter survival and cold tolerance, Yukon
becomes a stand-alone choice for transition zone
plantings.
BENEFITS
- Early Spring Green-up
- Top NTEP ratings for turf
quality
- Higher stolon density
- Uniform, dark green color
- Short internodes
- Ultra dense, ultra fine texture
|
- Superb winter hardiness
- Outstanding drought tolerance
- Spring Dead Spot resistance
- Excellent alternative to sprigs
& sod
- Reduced vertical growth
- Increased Fall color retention
|
CLICK TO
BUY
YUKON
BERMUDA
SEEDS
AT OUR STORE
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ESTABLISHMENT
- Seed new turf: 2-3 pounds per 1,000
square feet (90-125 pounds per acre)
- Seedling Emergence: 7-10 days
- First Mowing: Approximately 21 days
- Full coverage: 30 days
- First limited use: 60-90 days
|
|
View National Rankings in
NTEP Trials.
Yukon has outperformed other
seeded turf bermudagrasses in the NTEP trials, as well as
other turf test sites across the United States and overseas.
|
|
|
USE OF SEEDED VARIETIES FOR GREENS?
Seeded varieties are generally
NOT recommended
for high quality greens - they are fairway quality grasses.
Close-up picture of Yukon Bermuda
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