Midlawn Bermudagrass
A triploid variety of Bermudagrass called Midlawn, produces no viable seed, has superior cold hardiness, excellent turf quality, with fine texture, dark green color, good sod density and is slower spreading than Midiron and other, similar turf type Bermudagrass.
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The present invention relates to a new and distinct variety of hybrid Bermudagrass which is well-adapted to the transition zone of the United States. This turf-type hybrid was developed by open-pollination at the Kansas State University polycross nursery in Fort Hayes, Kans.
Bermudagrass is widely grown as a lawn grass, forage plant and for erosion control. Common Bermudagrass requires warm weather for growth. The devastating winter of 1989-90 killed many acres of Bermudagrass, establishing a need for hardy selections possessing high turf quality, particularly in the northern Bermudagrass belt or transition zone. In addition, current commercial Bermudagrass cultivars present certain problems for home lawn use in that they tend to be aggressive and of a coarse texture.
The distinguishing characteristics of this new variety of plant are excellent cold hardiness combined with high turf quality, that is to say, fine texture, dark green color, and good sod density. Midlawn Bermudagrass possesses increased cold tolerance to -20.degree. F. and is also very drought resistant. This cultivar has a shorter internode length, which advantageously makes it less aggressive and more suitable for residential use while at the same time providing a greater density to Midlawn turf. The lack of aggressiveness makes this a desirable grass for use around other ornamental plants. The average internode length of field grown Midlawn plants measures about 43 mm, while the average internode length of field grown Midiron Bermudagrass is about 51 mm.
Midlawn Bermudagrass is a clone, vegetatively propagated from rhizomes or stolons. The cultivar originated from a single seedling and was vegetatively propagated at Manhattan, Kans. The seed parent of Midlawn was a cold hardy, common tetraploid (2n=4.times.=36) Bermudagrass Cynodon dactylon var. dactylon collected from the campus of the Michigan State University of East Lansing. The pollen parent was one of several African diploid (2n=2.times.=18) Bermudagrasses C. transvaalensis, growing in the same polycross nursery as the common parent. Midlawn is a triploid with 2n=3.times.=27 chromosomes and is highly male and female sterile. The clone progeny have been shown to be stable in all distinguishing characteristics.
BRIEF DESCRIPTION OF THE DRAWING FIGURESFIG. 1 is a color photographic representation of a nursery grown potted Midlawn Bermudagrass plant in accordance with the invention;
FIG. 2 is a color photographic representation of a field grown Midlawn Bermudagrass plant subject to periodic mowing;
FIG. 3 is a graphic representation of electrophoretic banding patterns in the peroxidase isoenzyme system;
FIG. 4 is a phogograph illustrating the inflorescence of Midlawn Bermudagrass;
FIG. 5 is a photograph illustrating a single receme of Midlawn Bermudagrass; and
FIG. 6 is a photograph illustrating a single spikelet of Midlawn Bermudagrass.
BOTANICAL DESCRIPTION OF THE PLANTThe following taxonomic description is of the plant when grown in the greenhouse as a potted plant and describes specimens cultured under controlled conditions which can be reproduced. However, the description to follow should not be construed as limiting with regard to the expressed characteristics of this plant, because the characteristics of `Midlawn` have been observed to vary widely as a function of stage of growth, growing conditions, geographic location of culture, and management practices to which sod of the plant is subjected. Such differences in appearance of this plant can be appreciated with a comparison of FIG. 1 and FIG. 2 of the drawing, for example.
MIDLAWN BERMUDAGRASS`Midlawn` Bermudagrass, Cynodon dactylon.times.Cynodon transvaalensis, is a stononiferous sward-forming perennial with dense, slender underground tan to light brown rhizones; surface stolons slender, prostrate, and slow spreading; culms slender, about 5-30 cm high and about 0.5-1.5 mm in diameter in greenhouse grown, potted plants. Leaf-blades flat, or folded when dry, often short and narrow, about 1.5-2.5 mm wide and 70-85 mm long on fully extended mature shoots; leaves dark green with scattered hairs on upper (adaxial) surface; ligule a membranmous rim about 0.2-0.3 mm long, ciliate on the edge; leaf sheaths light green, sometimes developing purple (anthocyanin) pigmentation at base, glabrous except for few hairs at base, about 10-40 mm in length and about 1-5 mm in width. Internodes light green, sometimes developing purple (anthocyanin) pigmentation. Inflorescences infrequent, seldom producing seed heads; no viable seed produced. Midlawn exhibits a dark fern leaf color, #21-G-8, Maerz et al., A Dictionary of Color, McGraw-Hill Book Company, Inc. 2 Ed. (1950). Growth habit decumbent, prostrate, with a maximum height less than about 6 inches (15.24 cm).
Midlawn is effectively sterile but does exhibit complete flower parts. Anthers are formed in the flowers; however, little if any viable pollen is formed within the anthers.
Unmowed midlawn exhibits an average internode length from about 39.4 to 45.7 mm, and roots readily form at each node under favorable conditions of soil moisture and temperature.
Midlawn has been experimentally tested in comparison to other turf Bermudagrass cultivars at several locations in the United States for overall turf performance. It is superior to commercial turf Bermudagrass varieties in one or more of the following characteristics affecting turf performance: fineness of texture, sod density, color, and cold tolerance. Midlawn showed the highest frost tolerance rating of 28 cultivars tested, including Midiron. As compared with other seedless types, Midlawn produces fewer seed heads, and is less aggressive. Midlawn has a growth rate comparable to Tifgreen Bermudagrass which is the most widely used of Bermudagrass cultivars in the southern and southeastern parts of the United States. It is anticipated that Midlawn will be used exclusively as a lawn grass and for recreational turfs; it is not anticipated that Midlawn will be used as a forage grass. Midlawn exhibits substantially mowing and thatching characteristics as compared with conventional Bermudagrass cultivars.
Midlawn Bermudagrass is genetically and physiologically distinctive as compared to other turf Bermudagrass cultivars. As best shown in FIG. 3, Midlawn presents distinct electrophoretic banding patterns in the peroxidase isoenzyme system. Moreover, Midlawn exhibits inflorescence of unilateral racemes numbering 3-6, usually 4, 3-6 cm long (average 4.0 cm); spikelets perfect, 2-2.5 mm long with medium spacing on raceme, about 2.5 mm; glumes lancelate in side view, 1-nerved, the upper 1/3-1/2 as long as the spikelet; lemma pubescent on the keel; palea glaborus.
The outstanding characteristics of this new variety of Bermudagrass are greater cold-tolerance combined with excellent turf quality. Midlawn is a slow growing, fine textured dark green home lawn type grass with good density, few seed heads, and good sod strength.
The following tables 1-9 further describe the characteristics of Midlawn (A-22), as compared with other cultivars. Tables 3 and 4 confirm the spring green-up and frost heartiness of Midlawn. Table 9 demonstrates that Midlawn is resistant to Spring Dead Spot (Ophiosphaerella herpotrica).
TABLE 1
______________________________________
Sod Quality of Bermudagrass Clones, 1987-88.sup.1
Sod
Internode
Rhizome strength (lbs.)
(Kgs)
Bermuda clone
length (in.)
depth 1978 1981 1988
______________________________________
Midiron 2.0 1.75 12.5 17.7 16.7
KS Improved
1.5 4.28 28.0 23.2 NA
Midfield 1.8 2.72 33.5 44.9 45.7
Midlawn 1.7 2.34 34.3 31.8 30.7
______________________________________
.sup.1 Data for 1978 and 1981 from Kansas State University Research
Center; 1988 data from Mississippi State University
TABLE 2
______________________________________
Mean Turfgrass Quality Ratings of Bermudagrass
Cultivars at Thirteen Locations in the United States, 1990.sup.1
______________________________________
Turfgrass Quality Ratings (1-9, 9 = ideal turf)
Bermuda clone
AR AZ CA2 CA3 FL KS LA
______________________________________
Tifway 7.9 7.9 6.7 6.4 7.9 1.0 7.6
Tifway II 7.8 7.8 6.4 6.4 8.1 1.5 7.7
MSB-10 7.6 1.8 6.9 6.3 8.1 1.7 7.7
A-29 7.1 6.9 5.5 5.5 6.4 8.2 7.1
Midfield (E-29)
7.0 6.4 5.6 5.7 6.6 8.0 6.2
Midiron 6.8 6.4 5.9 5.8 6.9 7.5 6.8
Midlawn (A-22)
7.1 6.6 5.5 5.9 5.9 7.7 6.6
MSB-20 7.4 7.1 5.7 5.5 7.7 1.0 7.1
NM 43 6.9 7.1 5.6 5.8 7.7 1.2 7.2
MSB-30 6.0 6.9 6.5 5.8 6.5 2.7 7.1
Tufcote 7.6 6.2 5.7 5.7 7.2 2.0 7.4
Tifgreen 6.7 6.9 5.7 5.6 8.1 1.3 6.8
CT-23 5.0 7.2 5.6 5.9 6.5 3.0 7.2
NM 507 6.3 7.7 6.2 5.6 8.1 1.0 7.4
Texturf 10
6.3 6.6 5.5 5.5 7.0 2.8 6.3
NM 471 5.8 6.9 6.1 6.0 7.6 1.0 7.3
RS-1 6.0 5.6 5.5 5.7 5.7 5.8 5.9
FB-119 5.4 6.1 5.4 5.2 6.7 1.0 7.3
NM 375 5.7 6.2 5.4 5.6 7.1 1.0 6.6
Vamont 5.5 5.4 5.2 5.3 6.7 3.2 5.7
NMS 3 4.7 6.4 5.3 5.5 6.7 1.0 6.8
NM 72 4.8 6.4 5.2 5.1 7.8 1.0 6.6
NMS 4 5.6 6.3 5.5 5.3 7.2 1.0 6.2
Guymon 5.1 6.2 4.6 5.2 6.2 6.2 5.6
Numex-Sahara
4.7 4.7 5.2 5.1 4.9 1.0 6.3
NMS 2 4.9 4.5 5.1 5.1 3.8 1.0 5.4
NMS 14 4.5 4.6 4.9 4.8 4.6 1.0 5.2
AZ Common 4.6 4.2 4.8 4.9 4.4 1.0 5.4
LSD VALUE 1.1 0.6 0.4 0.4 1.1 1.4 0.6
______________________________________
Turfgrass Quality Ratings (1-9, 9 = ideal turf)
Bermuda clone
MD MO MS UB VA1 VA4 Mean
______________________________________
Tifway 7.1 1.9 7.5 7.3 6.2 7.1 6.3
Tifway II 6.8 1.0 7.7 7.3 6.3 7.1 6.3
MSB-10 6.8 1.0 7.6 6.7 6.3 6.8 6.3
A-29 5.8 1.4 5.1 7.0 7.0 5.5 6.0
Midfield (E-29)
5.8 2.8 4.4 6.8 6.5 5.9 6.0
Midiron 5.3 2.7 4.2 6.3 6.2 5.8 5.9
Midlawn (A-22)
5.7 1.4 5.1 6.7 6.2 5.8 5.8
MSB-20 6.3 1.0 6.9 7.6 5.5 6.6 5.8
NM 43 6.2 1.0 6.7 7.7 6.2 6.1 5.8
MSB-30 6.7 1.5 5.9 6.2 5.7 7.1 5.7
Tufcote 5.4 1.0 5.6 7.4 6.5 6.7 5.7
Tifgreen 5.9 1.0 6.2 7.8 6.0 6.4 5.7
CT-23 6.4 1.0 5.6 5.7 4.8 6.2 5.4
NM 507 6.2 1.0 4.5 4.3 4.8 6.9 5.4
Texturf 10
5.5 1.0 4.7 5.8 6.3 6.3 5.4
NM 471 5.8 1.0 4.4 4.8 5.2 6.9 5.3
RS-1 5.3 1.5 3.7 5.8 5.7 5.6 5.2
FB-119 5.8 1.2 4.6 6.3 6.3 6.0 5.2
NM 375 5.2 1.0 4.0 6.1 5.8 6.0 5.1
Vamont 4.8 2.1 4.0 4.9 5.7 5.8 5.0
NMS 3 5.7 1.0 3.8 5.9 5.5 6.2 5.0
NM 72 5.4 1.0 4.5 5.4 4.8 6.2 4.9
NMS 4 5.1 1.2 2.7 5.8 5.0 5.9 4.8
Guymon 4.8 2.6 2.2 5.1 3.2 3.0 4.6
Numex-Sahara
5.2 1.0 2.6 5.2 4.0 5.6 4.3
NMS 2 5.3 1.0 2.4 5.4 3.8 5.4 4.1
NMS 14 4.6 1.0 2.3 4.9 4.2 5.1 4.0
AZ Common 3.4 1.0 2.2 5.0 4.0 4.7 3.8
LSD VALUE 1.1 1.1 0.7 0.8 1.6 0.7 0.3
______________________________________
.sup.1 In certain states tests were performed at more than one location,
hence CA2 and CA3 for California and VA1 and VA4 for Virginia.
To determine statistical differences among entries, subtract one entry's
mean from another. Statistical differences occur when this value is large
than the corresponding LSD value (LSD 0.05).
TABLE 3
______________________________________
Spring Greenup Rating of Bermudagrass Cultivars, 1990.sup.1
Greenup Ratings (1-9, 9 = completely green)
Bermuda clone
AR AZ FL MS Mean
______________________________________
MSB-20 5.7 6.0 5.3 5.7 5.7
Midfield (E-29)
6.0 6.3 5.0 4.0 5.3
NM 43 5.3 6.3 4.3 5.0 5.3
Midlawn (A-22)
5.7 7.0 3.3 4.7 5.2
Tifway 5.0 6.3 4.3 5.0 5.2
Vamont 5.0 6.0 4.7 4.7 5.1
MSB-10 3.7 6.0 5.0 5.0 4.9
Midron 5.3 6.3 2.7 5.0 4.8
Tufote 5.7 4.7 3.0 5.7 4.8
Tifgreen 5.0 5.3 4.3 4.3 4.8
Tifway II 4.0 5.0 4.7 5.0 4.7
Texturf 10
3.7 6.3 4.0 4.0 4.5
A-29 4.7 5.0 3.3 4.7 4.4
RS-1 5.7 5.0 2.7 4.0 4.3
FB-119 1.7 6.7 5.7 3.0 4.3
NM 507 2.0 6.7 4.3 3.7 4.2
Guymon 5.7 5.0 3.3 2.0 4.0
NM 375 2.7 5.7 4.0 3.3 3.9
NM 72 2.0 5.3 4.3 4.0 3.9
MSB-30 1.7 7.3 2.3 4.0 3.8
NM 471 2.0 6.0 3.7 3.3 3.8
AZ Common 2.7 5.0 5.0 2.0 3.7
NMS 4 2.3 5.3 2.7 2.3 3.2
Numex-Sahara
3.0 4.3 3.0 2.0 3.1
NMS 14 2.7 4.7 2.3 2.0 2.9
CT-23 1.0 4.7 1.3 3.0 2.5
NMS 2 3.0 3.7 1.3 2.0 2.5
NMS 3 1.3 3.7 2.0 2.3 2.3
LSD VALUE 1.3 1.4 1.5 1.0 0.6
______________________________________
.sup.1 To determine statistical differences among entries, subtract one
entry's mean from another. Statistical differences occur when this value
is larger than the corresponding LSD value (LSD 0.05).
TABLE 4
______________________________________
Frost Tolerance Ratings of Bermudagrass Cultivars, 1990.sup.1
Frost Tolerance Ratings (1-9, 9 = no injury)
Bermuda clone
AR VA Mean
______________________________________
Tifway II 9.0 7.3 8.2
Tufcote 8.7 6.7 7.7
Tifway 8.7 6.3 7.5
CT-23 7.7 7.0 7.3
MSB-10 9.0 5.0 7.0
Midlawn (A-22)
8.0 5.3 6.7
Midfield (E-29)
7.3 5.7 6.5
MSB-30 8.7 4.0 6.3
NM 375 4.7 7.7 6.2
NM 507 7.0 4.7 5.8
A-29 8.0 3.0 5.5
NM 471 7.3 3.7 5.5
FB-119 5.3 5.0 5.2
NMS 2 5.3 4.7 5.0
NMS 4 6.3 3.7 5.0
Texturf 10
6.7 3.3 5.0
AZ Common 6.7 3.0 4.8
NMS 3 5.7 4.0 4.8
Numex-Sahara
5.3 4.3 4.8
NMS 14 5.0 3.7 4.3
RS-1 5.0 3.3 4.2
Midiron 5.0 3.0 4.0
NM 72 4.3 3.7 4.0
Tifgreen 5.7 2.3 4.0
Vamont 2.7 5.3 4.0
Guymon 4.7 3.0 3.8
NM 43 5.0 2.3 3.7
MSB-20 5.0 2.0 3.5
LSD VALUE 1.5 1.3 1.0
______________________________________
.sup.1 To determine statistical differences among entries, subtract one
entry's mean from another. Statistical differences occur when this value
is larger than the corresponding LSD value (LSD 0.05).
TABLE 5
______________________________________
Winter Kill Rating of Bermudagrass Cultivars, 1990.sup.1
Percent Winter Kill: Locations
Bermuda clone
IL MO UB Mean
______________________________________
NM 507 99.0 99.0 84.7 94.2
NM 471 99.0 99.0 81.7 93.2
C1-23 99.0 99.0 80.0 92.7
NMS 14 99.0 99.0 73.3 90.4
AZ-Common 99.0 99.0 70.0 89.3
NM 72 99.0 99.0 61.7 86.6
NMS 4 99.0 98.7 56.7 84.8
Numex-Sahara 99.0 99.0 51,7 83.2
NMS 2 99.0 99.0 50.0 82.7
FB-119 99.0 98.7 48.3 82.0
NMS 3 99.0 99.0 45.0 81.0
MSB-30 99.0 94.3 46.7 80.0
Texturf 10 99.0 98.7 28.3 75.3
NM 375 99.0 99.0 26.7 74.9
Tifway II 99.0 99.0 23.3 73.8
MSB-10 99.0 99.0 21.7 73.2
Tifway 99.0 94.0 18.3 70.4
NM 43 99.0 99.0 10.0 69.3
MAV-20 99.0 99.0 8.3 68.8
Tifgreen 99.0 99.0 8.3 68.8
Midlawn (A-22)
99.0 97.7 0.0 65.6
RS-1 99.0 96.0 1.7 65.6
A-29 99.0 96.0 0.0 65.0
Tufcote 89.3 99.0 0.0 62.8
Guymon 97.7 76.7 13.3 62.6
Vamont 86.0 81.3 0.0 55.3
Midiron 99.0 67.0 0.0 55.3
Midfield (E-29)
99.0 59.7 0.0 52.9
LSD VALUE 8.6 24.6 23.9 11.8
______________________________________
.sup. 1 To determine statistical differences among entries, subtract one
entry's mean from another. Statistical differences occur when this value
is larger than the corresponding LSD value (LSD 0.05).
TABLE 6
______________________________________
Genetic Color Ratings of Bermudagrass Cultivars, 1990.sup.1
Genetic Color Ratings (1-9, 9 = dark green)
Bermuda clone
AR AZ CA2 CA3 LA TX Mean
______________________________________
Tifway II 7.3 7.3 8.0 8.0 8.7 9.0 8.1
Tifway 7.7 7.3 8.0 7.7 8.7 8.0 7.9
NM 375 7.0 7.3 7.3 8.0 9.0 8.3 7.8
MSB-10 7.3 7.0 8.0 8.0 8.0 7.7 7.7
NM 507 6.7 8.0 7.7 7.0 8.3 8.0 7.6
MSB-30 7.3 8.0 7.0 6.3 9.0 8.0 7.6
NM 471 6.3 7.7 7.7 7.7 8.0 8.0 7.6
Tufcote 6.7 6.7 6.7 6.7 7.7 8.3 7.1
NMS 3 5.7 7.0 7.0 6.7 8.0 8.0 7.1
Texturf 10 6.7 6.7 7.0 6.3 7.7 8.0 7.1
Midiron 4.0 6.7 7.7 8.3 7.3 8.0 7.0
NMS 4 6.3 6.3 6.7 6.7 8.3 7.7 7.0
A-29 6.0 6.0 7.3 7.0 7.0 7.3 6.8
Midlawn (A-22)
5.7 5.3 6.7 7.0 7.7 8.0 6.7
MSB-20 6.3 6.7 6.7 6.7 7.0 6.7 6.7
Tifgreen 6.3 6.3 6.7 6.3 7.0 7.3 6.7
NM 72 5.3 7.0 6.7 6.0 7.3 7.3 6.6
Midfield (E-29)
5.3 5.7 7.0 6.7 6.3 8.0 6.5
FB-119 5.3 6.3 6.7 6.3 7.3 7.0 6.5
Guymon 4.7 6.0 6.7 7.0 7.3 7.3 6.5
CT-23 5.3 6.0 6.7 6.7 7.0 7.0 6.4
NM 43 5.7 6.3 6.0 5.7 8.0 6.3 6.3
Numex-Sahara
5.3 5.3 5.7 5.7 8.0 7.7 6.3
NMS 2 5.3 5.3 6.0 5.7 7.0 7.3 6.1
Vamont 5.0 5.3 6.7 6.0 7.3 6.3 6.1
RS-1 4.3 5.7 7.0 6.0 7.0 6.3 6.1
NMJS 14 4.7 4.7 6.3 5.0 7.0 7.3 5.8
AZ Common 5.0 4.0 5.7 5.7 7.3 7.0 5.8
LSD VALUE 1.6 1.0 0.7 0.9 0.7 0.8 0.4
______________________________________
.sup.1 To determine statistical differences among entries, subtract one
entry's mean from another. Statistical differences occur when this value
is larger than the corresponding LSD value (LSD 0.05).
TABLE 7
______________________________________
Leaf Texture Ratings of Bermudagrass Cultivars, 1990.sup.1
Leaf Texture Ratings
(1-9, 9 = very fine)
Bermuda clone
AR1 AZ1 LA1 Mean
______________________________________
MSB-20 8.7 8.0 9.0 8.6
Tifway II 8.3 8.0 9.0 8.4
MSB-10 8.3 8.0 8.7 8.3
NM 43 7.7 8.0 8.7 8.1
Tifway 7.7 8.0 8.7 8.1
Tifgreen 8.3 7.3 8.0 7.9
Midlawn (A-22)
7.3 8.0 8.0 7.8
CT-23 6.3 7.7 8.3 7.4
NM 471 6.0 7.0 8.3 7.1
NM 507 6.0 7.0 8.0 7.0
Tufcote 7.0 6.3 7.7 7.0
NM 72 6.0 7.0 7.3 6.8
NMS 3 6.3 7.0 7.0 6.8
NMS 4 6.0 7.0 7.0 6.7
A-29 6.0 6.7 7.0 6.6
FB-119 5.7 7.0 7.0 6.6
MSB-30 6.0 6.7 7.0 6.6
NM 375 6.0 6.7 7.0 6.6
Midron 6.3 6.3 7.0 6.6
Texturf 10 5.3 6.3 7.7 6.4
Midfield (E-29)
6.3 6.3 6.0 6.2
Numex-Sahara 5.0 6.0 7.0 6.0
AZ Common 6.3 5.3 6.0 5.9
NMS 2 4.7 5.7 6.3 5.6
RS-1 4.7 6.0 6.0 5.6
Vamont 4.7 5.7 5.3 5.2
NMS 14 4.3 5.3 5.7 5.1
Guymon 3.3 5.7 5.3 4.8
LSD VALUE 1.2 0.7 0.6 0.5
______________________________________
.sup.1 To determine statistical differences among entries, subtract one
entry's mean from another. Statistical differences occur when this value
is larger than the corresponding LSD value (LSD 0.05).
TABLE 8
______________________________________
Summer Density Ratings of Bermudagrass Cultivars, 1990.sup.1
Density Ratings
(1-9, 9= maximum density)
Bermuda clone AR Mean
______________________________________
MSB-20 9.0 9.0
Tifway 9.0 9.0
Tifway II 9.0 9.0
MSB-10 8.7 8.7
Tufcote 8.0 8.0
Midlawn (A-22) 7.7 7.7
NM 375 7.7 7.7
NM 43 7.7 7.7
NM 471 7.7 7.7
NM 507 7.7 7.7
Texturf 10 7.7 7.7
Tifgreen 7.7 7.7
A-29 7.3 7.3
FB-119 7.3 7.3
MSB-30 7.0 7.0
NM 72 7.0 7.0
Midfield (E-29) 6.7 6.7
Midiron 6.7 6.7
NMS 3 6.7 6.7
NMS 4 6.7 6.7
RS-1 6.7 6.7
CT-23 6.3 6.3
AZ Common 5.7 5.7
NMS 2 5.7 5.7
Vamont 5.7 5.7
Numex-Sahara 5.0 5.0
NMS 14 5.0 5.0
Guymon 4.3 4.3
LSD VALUE 1.1 1.1
______________________________________
.sup.1 To determine statistical differences among entries, subtract one
entry's mean from another. Statistical differences occur when this value
is larger than the corresponding LSD value (LSD 0.05).
TABLE 9
______________________________________
Evaluation of Bermudagrass Clones
at the Horticulture Research Center, Wichita, KS
for Susceptibility to Spring Dead Spot
Number % Kill Total
of % Area in Plot
Bermuda clone.sup.1
Spots w/Spots Spots Quality.sup.2
______________________________________
Midiron 2.0 4.0 26.7 8.7
Midlawn (A-22)
1.3 6.2 21.7 9.0
Midfield (E-29)
2.3 7.8 26.7 8.0
A-29 2.3 12.9 33.3 8.0
Guymon 2.7 10.0 70.0 6.0
Midway 2.0 11.5 43.3 7.0
RS-1 3.3 20.6 70.0 6.3
Texturf 10 3.0 24.7 96.7 5.7
Vamont 3.3 26.1 95.0 4.6
Sunturf 3.3 32.7 90.0 4.7
Tifgreen 4.0 36.11 98.3 4.0
LSD (P = 0.05)
0.3 14.7 17.0 1.4
______________________________________
.sup.1 Other clones in test with complete winter kill in at least two of
the three replicated plot included CT23, NM 43, NM72, NM375, NM 471,
NM507, MSB10, MSB20, MSB30, Tufcote, Tifway, Tifway II, NMS1, NMS3, NMS4,
NMS14, Arizona Common, and FB119.
.sup.2 Plot quality rating where 0 = complete kill of plot, and 9 = 90% o
better coverage of plot.
Claims
1. A new and distinct variety of Bermudagrass as shown and described.
Type: Grant
Filed: May 28, 1991
Date of Patent: Feb 23, 1993
Assignee: Kansas State University Research Foundation (Manhattan, KS)
Inventor: Ray A. Keen (Manhattan, KS)
Primary Examiner: James R. Feyrer
Law Firm: Hovey, Williams, Timmons & Collins
Application Number: 7/706,273
International Classification: A01H 500;
