Kentucky bluegrass
A variety of Kentucky bluegrass having a high level of disease resistance, good turf performance, and a very high level of seed yield potential.
Latest The O. M. Scott & Sons Company Patents:
Kentucky bluegrasses have been disclosed in U.S. Plant Pat. No. 3,156 which issued on May 9, 1972; U.S. Plant Pat. No. 3,186 which issued on May 23, 1972; U.S. Plant Pat. No. 4,336 which issued on Nov. 28, 1978; U.S. Plant patent application, Ser. No. 872,537, filed June 10, 1986; U.S. Plant patent application, Ser. No. 910,146, filed Sept. 19, 1986; U.S. Plant patent application, Ser. No. 27,285, filed Mar. 17, 1987 and U.S. Plant patent application, Ser. No. 28,424, filed Mar. 17, 1987.
SUMMARY OF THE VARIETYThe present invention relates to a new and distinct variety of Poa pratensis that has been designated Ba 72-441 Kentucky bluegrass.
Ba 72-441 plant material originated by crossing a Kentucky bluegrass plant ("Victa") disclosed in U.S. Plant Pat. No. 3,156, the seed parent, with a Kentucky bluegrass plant ("Windsor") disclosed in U.S. Plant Pat. No. 2,364, the pollen parent. As a result of this breeding, a distinct variety was produced and asexually propagated by rhizomes, tillers and disseminules. Seed of Ba 72-441 was produced first at Marysville, Ohio and later at Gervais, Oreg. This seed was used to plant turf performance evaluation trials.
Asexual reproduction of Ba 72-441 by propagules (tillers and rhizomes) and by disseminules (modified caryopses produced by apomixis) has consistently produced progeny plants indistinguishable from the mother plant.
Ba 72-441 has a number of highly desirable characteristics including a good level of resistance to Helminthosporium spp. that causes leaf spot, melting out and crown rot, Ustilago striiformis that causes stripe smut, and Puccinia spp. that causes rust; an attractive leafy turf type growth habit; moderately wide leaf blades; an attractive green color which can be maintained throughout the entire growing season; good turf performance as evidenced by consistently high scores in tests throughout the U.S.A.; and a very high seed yield potential in the bluegrass seed production region of the U.S.A.
In comparison with its seed parent, the new variety has a thinner peduncle, a more narrow and thinner flag leaf, and better winter color. In comparison to the pollen parent, the new variety has fewer seeds per pound and a higher seed yield.
BRIEF DESCRIPTION OF THE DRAWINGFIG. 1 is a photograph of Ba 72-441 Kentucky bluegrass plant in the vegetative stage including the extensive root and rhizome system;
FIG. 2 is a photograph of Ba 72-441 Kentucky bluegrass panicle;
FIG. 3 is a photograph of Ba 72-441 Kentucky bluegrass seed; and
FIG. 4 is a photograph of Ba 72-441 Kentucky bluegrass turf.
DETAILED DESCRIPTION OF THE VARIETYBa 72-441 Kentucky bluegrass (Poa protensis L.) is perennial with creeping rhizomes forming a moderately dense turf. When plants overwinter in the field with freezing temperatures and then are brought into the greenhouse during late winter to continue growth undisturbed by clipping under moderate temperatures (60.degree.-80.degree. F.), culms are erect averaging 421 mm in length with an average of 2.7 nodes per culm. The uppermost internode averages 9.3 cm, and the peduncle averages 10.6 cm in length, and 0.558 mm in thickness. The flag leaf averages 4.3 cm in length, 3.3 mm in width and 0.107 mm in thickness. The panicle has an average length of 7.6 cm, width of 4.2 cm, and 5.2 whorls. The lowest whorl has an average of 4.0 branches and the third whorl from the bottom of the panicle has an average of 2.7 branches. The average spikelet at the tip of a branch in the lowest whorl is 5.1 mm in length and has 3.9 florets with an outer glume of 2.9 mm and an inner glume of 3.3 mm in length. A similar spikelet from the third whorl from the bottom of the panicle is 5.0 mm in length and has 3.8 florets with an outer glume of 3.3 mm and an inner glume of 3.3 mm in length. After the seed has been conditioned, the lemma has a generally smooth keel with occasional short hairs and a few long fine hairs at the base. The seed of Ba 72-441 is 3.18 mm in length and 0.88 mm in width with approximately 1,003,037 seeds per pound. Comparisons of Ba 72-441 with other varieties on seed dimensions and on seed numbers per pound are shown in Tables 1 and 2.
TABLE 1
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Seed Measurements of Ba 72-441 and Other Bluegrass
Varieties After Conditioning.
Length Width
Variety (mm) (mm)
______________________________________
Ba 72-441 3.18 0.88
Ba 70-139 2.86 0.78
Ba 72-492 2.53 0.76
Ba 72-500 2.77 0.80
Baron 3.07 0.86
Bristol 2.73 0.80
Nassau 2.96 0.78
Newport 2.76 0.71
Park 3.04 0.72
Ram I 3.51 0.84
Victa 3.20 0.86
LSD(.05) 0.19 0.06
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TABLE 2
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Comparison of Seed Numbers Per Pound of Ba 72-441 and
Other Bluegrass Varieties After Conditioning.
Number of Seeds
Per Pound
______________________________________
Ba-72-441 1,003,037
Ba 70-139 1,246,200
Ba 72-492 1,275,740
Ba 72-500 1,300,105
Adelphi 1,383,976
America 1,659,824
Gnome 1,017,641
Baron 1,051,693
Birka 1,223,530
Bonnieblue 1,135,303
Bristol 1,270,821
Eclipse 1,335,668
Glade 1,108,441
Kenblue 1,463,923
Merit 1,109,728
Nassau 1,127,130
Newport 1,226,481
Park 1,248,349
Sydsport 1,355,644
Vantage 1,555,303
Victa 1,038,298
Windsor 1,520,885
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Since environmental conditions such as soil and climate may influence morphological characters to some extent, comparisons of morphological characteristics of Ba 72-441 are made with other Kentucky bluegrass varieties in Tables 3-10.
TABLE 3
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Morphological Comparison of Panicles of Ba 72-441 and
Other Bluegrass Varieties in the Greenhouse at Marysville, Ohio.
Num-
ber of
Number of
Panicle Panicle Panicle Whorls
Branches
Nod- Length Width Per Lower Third
Variety
ding* (cm) (cm) Panicle
Whorl Whorl
______________________________________
Ba 72-441
1.4 7.6 4.2 5.2 4.0 2.7
Ba 70-139
2.0 6.7 3.7 4.8 3.8 2.7
Ba 72-492
1.2 7.5 4.2 5.5 4.0 3.0
Ba 72-500
2.0 6.8 3.8 5.0 4.0 2.4
Baron 1.0 7.8 4.1 5.2 3.8 2.5
Bristol
2.0 9.7 5.0 5.0 3.3 2.7
Nassau 2.0 10.0 6.0 5.0 3.0 2.0
Newport
2.0 10.3 4.4 4.5 2.3 2.3
Park 1.6 9.0 3.7 4.0 4.3 3.7
Ram I 2.0 9.0 4.7 4.0 2.5 2.0
Victa 1.2 7.5 4.1 5.4 4.4 3.4
LSD(.05)
0.5 1.6 1.0 0.8 0.7 0.8
______________________________________
*Panicle nodding rated: 1 = erect, 2 = nodding.
TABLE 4
______________________________________
Morphological Comparison of Spikelets of Ba 72-441 and Other
Bluegrass Varieties in the Greenhouse at Marysville, Ohio.
Spikelet Number of Florets
Length (mm) per Spikelet
Lowest Third Lowest Third
Variety Whorl Whorl Whorl Whorl
______________________________________
Ba 72-441
5.1 5.0 3.9 3.8
Ba 70-139
5.2 5.2 4.2 4.0
Ba 72-492
5.2 5.0 4.4 4.2
Ba 72-500
5.1 5.0 4.2 3.9
Baron 5.0 5.0 3.7 3.8
Bristol 6.2 6.0 5.7 5.3
Nassau 4.6 4.6 4.5 4.5
Newport 5.3 5.2 5.2 5.2
Park 6.5 6.7 5.2 4.7
Ram I 4.7 5.2 5.2 5.5
Victa 5.2 5.0 3.8 3.8
LSD(.05) 0.9 0.8 1.1 1.0
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TABLE 5
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Morphological Comparison of Glumes of Ba 72-441 and Other
Bluegrass Varieties in the Greenhouse at Marysville, Ohio.
Glume Length (mm)
Outer Inner
Lowest Third Lowest Third
Variety Whorl Whorl Whorl Whorl
______________________________________
Ba 72-441
2.9 2.9 3.3 3.3
Ba 70-139
3.2 3.1 3.5 3.5
Ba 72-492
2.9 3.0 3.3 3.3
Ba 72-500
3.1 3.1 3.4 3.4
Baron 2.9 2.8 3.4 3.3
Bristol 3.4 3.3 3.7 3.9
Nassau 2.3 2.4 2.7 2.7
Newport 2.6 2.5 2.9 2.9
Park 3.0 3.2 3.5 3.7
Ram I 2.6 2.4 2.9 2.7
Victa 2.8 3.0 3.3 3.3
LSD(.05) 0.5 0.4 0.4 0.4
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TABLE 6
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Morphological Comparison of Flag Leaves of Ba 72-441 and
Other Bluegrass Varieties in the Greenhouse at Marysville, Ohio.
Flag Leaf Flag Leaf Flag Leaf
Length Width Thickness
Variety (cm) (mm) (mm)
______________________________________
Ba 72-441
4.3 3.3 0.107
Ba 70-139
4.7 3.2 0.112
Ba 72-492
5.2 3.6 0.117
Ba 72-500
4.1 3.2 0.112
Baron 4.5 3.2 0.119
Bristol 5.5 3.4 0.127
Nassau 6.2 3.1 0.127
Newport 6.1 3.5 0.135
Park 4.2 2.6 0.109
Ram I 4.7 3.1 0.127
Victa 5.9 4.0 0.124
LSD(.05) 1.8 0.6 0.013
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TABLE 7
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Morphological Comparison of Peduncles, Culms, and
Internodes of Ba 72-441 and Other Bluegrass Varieties
in the Greehouse at Marysville, Ohio.
Top
Peduncle Peduncle Culm Number of
Internode
Length Width Length
Nodes Per
Length
Variety
(cm) (mm) (mm) Culm (cm)
______________________________________
Ba 72-441
10.6 0.558 421 2.7 9.3
Ba 70-139
13.2 0.610 435 2.7 10.2
Ba 72-492
12.6 0.558 486 2.2 10.5
Ba 72-500
12.9 0.660 439 2.7 9.8
Baron 12.7 0.559 482 2.5 10.1
Bristol
15.0 0.686 522 2.7 11.3
Nassau 8.0 0.533 450 2.5 11.2
Newport
18.0 0.558 547 2.3 11.2
Park 14.3 0.787 578 3.0 13.0
Ram I 18.5 0.610 527 3.0 10.2
Victa 12.2 0.711 474 2.4 10.6
LSD(.05)
3.7 0.018 79 0.6 2.1
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TABLE 8
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Morphological Comparison of Leaves of Ba 72-441 and Other
Bluegrass Varieties in the Greenhouse at Marysville, Ohio.
Leaf
Ligule Leaf Leaf Angle
Length Length Width (Degrees
Variety (mm) (mm) (mm) From Horizontal)
______________________________________
Ba 72-441
0.23 218 3.9 56
Ba 70-139
0.26 218 4.1 55
Ba 72-492
0.28 239 4.4 52
Ba 72-500
0.25 204 4.1 50
Baron 0.30 313 4.4 63
Bristol 0.30 253 4.3 37
Nassau 0.22 226 3.5 39
Newport 0.22 251 4.1 50
Park 0.33 329 4.2 44
Ram I 0.18 188 3.7 40
Victa 0.28 235 4.3 52
LSD(.05)
0.11 49 0.6 10
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TABLE 9
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Morphological Comparison of Leaf Hairs of Ba 72-441 and
Other Bluegrass Varieties in the Greenhouse at Marysville, Ohio.
Hairs.sup.a Around
Ligule on
Upper Surface Hairs.sup.a on
Hairs.sup.b on
Variety of the Leaf Collar Ligule
______________________________________
Ba 72-441
1.0 3.4 2.2
Ba 70-139
1.0 3.5 1.5
Ba 72-492
1.0 3.2 1.3
Ba 72-500
1.0 3.5 2.7
Baron 1.0 5.0 4.0
Bristol 1.3 4.7 4.3
Nassau 2.7 5.0 1.0
Newport 1.0 4.0 0.8
Park 1.0 1.7 0.0
Ram I 1.0 3.7 0.3
Victa 1.0 3.3 2.2
LSD(.05) 0.3 1.4 1.8
______________________________________
.sup.a Hairs around ligule and on collar rated 1-5: 1 = none, 5 = many.
.sup.b Hairs on ligule rated 0-5: O = none, 5 = many.
TABLE 10
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Morphological Comparisons of Ba 72-441 and Other Bluegrass
Varieties Grown as Unmowed Spaced Plants in the Field at
Marysville, Ohio.
Mature
Plant Height Panicle Density
Seedhead Weight
______________________________________
Ba 72-441
38 7 656
Ba 70-139
35 5 402
Adelphi
42 3 345
Nugget 17 3 233
Bristol
40 4 511
Merion 25 2 320
Glade 20 3 214
Vantage
52 2 1019
Victa 23 2 648
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Ratings: Mature Plant Height (cm) includes panicle.
Panicle Density 1-10, 10 = high panicle density.
Seedhead Weight Weight (mg) of 3 panicles.
Ba 72-441 has performed well throughout the U.S.A., as exhibited by high turf quality ratings in many different locations in comparison to other varieties. In addition, it has a pleasant medium green color which can be maintained throughout the growing season, good winter color, and early spring greening. Comparisons of Ba 72-441 with other varieties for quality and color are shown in Tables 11-14.
TABLE 11
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Comparison of the Turf Quality of Ba 72-441 and Other
Bluegrass Varieties in the U.S.A.
Lin- Marysville,
Adelphia coln Maryland Ohio
New Nebra- Belts-
Acco- Test Test
Jersey ska ville keek 1 2
2 Year 2 Year 1 Year
3 Year
5 Year
5 Year
Variety Mean Mean Mean Mean Mean Mean
______________________________________
Ba 72-441
6.6 6.0 5.9 2.7 2.7 2.4
A-34 6.2 5.6
Adelphi 6.4 6.1 5.9 2.4 2.7
Banff 4.8
Baron 6.4 5.6 5.3 2.4
Birka 5.9 5.9 1.8
Bonnieblue
6.7 5.8 5.0 2.3
Bono 1.9
Bristol 6.5 5.9 5.0 2.3 2.7 2.3
Eclipse 7.2 5.8 5.9
Fylking 5.7 6.1 4.9 2.1
Geary 3.6
Glade 6.7 6.4 5.3
Kenblue 3.3 1.8 2.0
Merion 6.0 5.9 5.3 2.2
Merit 6.2 6.0 6.1 2.3 2.2
Midnight
7.3 5.9 5.5 2.4
Monopoly
5.7 4.9
Nassau 5.9 4.5
Newport 2.1
Parade 5.6 6.5 5.0 2.7
Park 5.7 2.0 2.1
Ram I 6.2 5.9 4.6 2.4
Rugby 2.2
Shasta 5.7
Sydsport
6.0 6.3 5.8 2.2
Touchdown
6.1 5.9 5.8
Trenton 2.4
Vantage 3.6 5.8 5.5 2.3 2.6 2.0
Victa 6.5 5.7 5.5 2.3 2.6 2.3
Wabash 4.8
______________________________________
Rating Scale: Larger number indicates higher quality.
TABLE 12
______________________________________
Comparison of Turf Color of Ba 72-441 and Other
Bluegrass Varieties at Various Locations in the U.S.A.
St. Louis
Lincoln Marysville
Prince Frederick
Variety Missouri Nebraska Ohio Maryland
______________________________________
Ba 72-441
9.1 7.0 8.3 7.5
A-34 6.5
Adelphi 9.4 7.2 8.4 7.8
America 9.4 7.0 8.5
Baron 9.2 6.9 8.5 7.3
Birka 9.1 6.7 8.1 7.0
Bonnieblue 7.0 7.7
Bono 9.0 6.6
Bristol 9.5 7.3 8.9 7.4
Eclipse 7.0 8.5
Fylking 6.8
Glade 9.3 7.1 8.4
Kenblue 8.1 5.9
Merion 6.9
Merit 9.2 7.0 6.8
Midnight 7.9 8.9 7.4
Newport
Parade 6.8
Park 9.0 6.1 8.1 6.6
Ram I 7.3 7.8
Rugby 6.8 7.9
Sydsport
9.2 7.0 8.2
Touchdown
9.0 6.8 8.1
Vantage 9.2 6.8 8.5 7.7
Victa 9.2 6.9 8.4 7.1
Wabash 7.0
LSD(.05)
0.3 -- -- --
______________________________________
Rating Scale: Larger number indicates darker green color.
TABLE 13
______________________________________
Winter Color of Ba 72-441 and Other Bluegrass Varieties.
Gervais, Oregon
Marysville, Ohio
Variety 2 Year Mean 1 Year Mean
______________________________________
Ba 72-441 4.8 2.7
Adelphi -- 2.0
Bristol 5.4 6.7
Parade -- 3.8
Park -- 1.2
Vantage -- 1.7
Victa 3.4 2.7
LSD(.05) 0.9 --
______________________________________
Rated 1-9: 9 = darkest green color.
TABLE 14
______________________________________
Spring Greening of Ba 72-441 and Other Bluegrass Varieties.
Maryland
Lincoln Prince Belts- Marysville, Ohio
Variety Nebraska Frederick ville Test 1 Test 2
______________________________________
Ba 72-441
6.0 7.0 5.3 5.3 3.5
A-34 5.0 5.3
Adelphi 6.8 7.0 4.7 7.7 2.8
America 4.8 4.7 6.3
Banff 5.3
Baron 5.3 7.0 4.3 3.0
Birka 5.0 7.3 4.7 5.7
Bonnieblue
5.3 7.0
Bono 8.3
Bristol 5.5 7.3 4.7 5.7 4.2
Cheri 4.8 4.3
Eclipse 5.5 5.7 6.5
Enmundi 5.3 4.7
Fylking 4.8 4.7
Geronimo 6.3
Glade 5.3 5.3 5.0
Kenblue 6.3 3.3 8.0
Merion 5.0 4.0
Merit 5.5 6.0 4.3
Midnight
4.8 7.0 4.7 2.0
Monopoly 5.3
Nassau 7.7
Nugget 2.3
Parade 5.5 4.3 3.2
Park 5.8 6.0 7.7 2.5
Ram I 5.5 7.7 6.5
Rugby 5.0 7.0
Shasta 5.3
Sydsport
4.8 4.7 5.3
Touchdown
5.3 4.3 5.7
Vantage 5.8 7.7 5.0 8.0 3.0
Victa 5.8 5.7 3.7 4.3 3.0
Wabash 6.7 5.3
LSD 0.8 1.8 1.6
______________________________________
Rated 1-9: 9 = darkest green color.
Turf diseases are one of the major causes of inconsistent and poor turf performance among locations and years. Ba 72-441 has been found to have a high level of resistance to leaf spot (also known as melting out and crown rot) caused by Helminthosporium vagans, a medium to high level of resistance to rust caused by Puccinia spp., a medium level of resistance to dollarspot caused by Sclerotina homeocarpa, and a high level of resistance to stripe smut caused by Ustilago striiformis.
Resistance to stripe smut was determined in tests in Ohio and Maryland where Ba 72-441 and the standard varieties included in the tests had little or no incidence of stripe smut but several experimental selections were heavily infected. Comparisons of resistance to leaf spot, rust, and dollarspot are presented in Tables 15-17.
TABLE 15
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Comparison of Leafspot Disease Incidence on Ba 72-441 and
Other Bluegrasses at Several Locations in the U.S.A.
St. Marysville,
Louis.sup.a Beltsville.sup.b
Adelphia.sup.b
Ohio.sup.a
Variety Missouri Maryland New Jersey
Test 1
Test 2
______________________________________
Ba 72-441
2 8.0 8.0 6 42
A-34 5.3 4.3
Adelphi 2 8.0 5.7 9 75
America 8 43
Banff 5.3 7.0
Baron 2 7.0 8.7 42
Birka 5 6.3 58
Bonnieblue 7.0
Bono 7 63
Bristol 2 7.0 8.3 5 43
Eclipse 7.7 9.0 80
Fylking 6.7 6.3
Geary 2.0
Glade 2 7.3 6.3 38
Kenblue 3.3 1.7 93
Merion 6.1 7.7
Merit 3 7.3 7.7
Midnight 7.0 7.0
Monopoly 5.3 6.0
Nassau 7.7 7.4
Parade 6.0 5.0 10
Park 52 54 95
Ram I 6.5 7.0
Rugby 5.0
Shasta 6.0
Sydsport
3 7.3 6.3 48
Touchdown
7 7.7 57
Trenton 6.0
Vantage 7 5.0 2.0 15 90
Victa 2 8.0 7.0 7 22
Wabash 2.0
LSD(.05)
7 1.9 34
______________________________________
Ratings
.sup.a % of turf affected by disease.
.sup.b 1-9: 9 = least disease.
TABLE 16
______________________________________
Comparison of Rust (Puccinia spp.) Disease Incidence on
Ba 72-441 and Other Bluegrasses.
Adelphia.sup.a
Gervais, Oregon
Variety New Jersey Turf.sup.b
Seed Production.sup.c
______________________________________
Ba 72-441 7.0 43 2.0
Adelphi 7.1
America 7.4
Banff 6.5
Baron 6.4
Birka 3.5
Bonnieblue
5.4
Bristol 7.7 7 4.0
Eclipse 4.7
Julia 4.0
Merion 2.4
Merit 5.7
Midnight 7.0
Monopoly 7.1
Mosa 4.0
Nassau 6.8
Newport 4.0
Parade 6.2
Ram I 7.0
Touchdown 3.5
Vantage 6.2
Victa 5.6 63 2.0
LSD(.05) 0.9
______________________________________
Ratings:
.sup.a Stem Rust (Puccinia graminis Pers.)0-9: 9 = no disease.
.sup.b % of turf affected by disease.
.sup.c 1-4: 4 = very susceptible.
TABLE 17
______________________________________
Comparison of Dollarspot Disease Incidence on Ba 72-441
and Other Bluegrasses. -
Prince Frederick
Marysville
Variety
Maryland Ohio
______________________________________
Ba 72-441 15 27
Adelphi 8 20
America 13
Baron 50 23
Birka 6 47
Bonnieblue 10
Bono 4 63
Bristol 6 17
Eclipse 8
Glade 40
Kenblue 8 37
Merit 4
Midnight 6
Park 33
Ram I 40
Rugby 12
Sydsport 43
Touchdown 50
Trenton 28
Vantage 11 15
Victa 5 23
Wabash 11
LSD(.05) 19 24
______________________________________
Rating: % of turf affected by disease.
Ba 72-441 has the capability to tolerate heat and drought stress. In addition, it has a low growth habit and a slower vertical growth rate than many varieties, especially the common type of varieties such as Park, Newport, and Kenblue, that should allow it to tolerate lower mowing heights and possibly decrease the total number of mowings per year without sacrificing overall turf performance. The leaf texture of the new variety is similar to many bluegrass varieties when maintained under mowed turf conditions. Comparisons showing tolerance to drought and heat stress, growth habit, and leaf texture are presented in Tables 18-20.
TABLE 18
______________________________________
Comparison of Drought and Heat Tolerance of Ba 72-441
and Other Bluegrasses.
Prince Frederick
Marysville
Variety Maryland Ohio
______________________________________
Ba 72-441 2 1
Adelphi 12 18
Baron 10
Birka 5
Bonnieblue 4
Bono 13
Bristol 11 8
Kenblue 15
Merit 7
Midnight 13
Parade 27
Park 7 13
Ram I 6
Rugby 9
Vantage 10 8
Victa 9 13
Wabash 9
______________________________________
Rated as % turf losing healthy green color.
TABLE 19
______________________________________
Comparison of Growth Habit of Ba 72-441 and Other Bluegrass
Varieties Under Mowed Conditions at Marysville, Ohio.
Test 1.sup.a
Variety Year 1 Year 2 Test 2.sup.b
______________________________________
Ba 72-441 79 61 1.7
Adelphi 2.7
Bristol 69 73 2.0
Fylking 95 80
Kenblue 96 81
Merion 76 71
Merit 86 76
Newport 92 78
Parade 2.3
Park 2.3
Sydsport 70 64
Vantage 85 65 2.0
Victa 81 64 2.0
LSD(.05) 15 13 0.6
______________________________________
Rating:
.sup.a Height (mm) of turf about one week after last mowing.
.sup.b 0-9: 9 = very tall growing turf, 0 = no growth since last mowing.
TABLE 20
______________________________________
Comparison of Leaf Texture of Ba 72-441 and Other
Bluegrasses Under Mowed Turf Conditions.
St. Louis
Marysville
Variety Missouri Ohio
______________________________________
Ba 72-441 4.6 5.0
Adelphi 5.3
America 6.0
Baron 4.6
Birka 6.0
Bono 5.6
Bristol 5.3 5.0
Fylking 5.8
Glade 6.0
Kenblue 5.5
Merion 5.0
Merit 4.3 5.0
Newport 5.0
Park 6.0
Sydsport 5.0 5.0
Touchdown 5.0
Vantage 6.0 5.3
Victa 4.4 4.8
LSD(.05) 0.7 0.4
______________________________________
Rating: 1-9: 9 = narrowest leaf blade.
The new variety has a very high level of seed yielding potential which will make it economical to produce and aid in its commercial success. Comparative results on seed yield are shown in Table 21.
TABLE 21
______________________________________
Seed Yield Comparisons of Ba 72-441 and Other Bluegrass
Varieties in Oregon.
Location Gervais LaGrande
Harvest Year
Year 1 Year 2 Mean Year 1
Year 2
Mean
______________________________________
Variety
Ba 72-441
691 1586 1139 1512 1253 1383
Victa 780 1394 1087 1419 1200 1310
Newport 435 1256 846
Bristol 347 808 578 1089 970 1030
Mosa 322 1060 691
Julia 296 1016 656
LSD(.05) 140 134 149 181 220
______________________________________
Rating: Pounds per acre of conditioned seed.
Claims
1. A variety of Kentucky bluegrass plant, substantially as shown and described, characterized by a high level of resistance to disease, especially leaf spot disease, a desirable green color throughout the growing season, a high quality persistent turf under a wide variety of environmental conditions and a very high level of seed yielding capacity.
Type: Grant
Filed: May 29, 1987
Date of Patent: Feb 7, 1989
Assignee: The O. M. Scott & Sons Company (Marysville, OH)
Inventors: Virgil D. Meier (Marysville, OH), James K. Turner (Salem, OR), Eugene W. Mayer (Marysville, OH)
Primary Examiner: Robert E. Bagwill
Application Number: 7/55,435
International Classification: A01H 500;
