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 ______________________________________ 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 ______________________________________
TABLE 2 ______________________________________ 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 ______________________________________
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 ______________________________________ 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 ______________________________________
TABLE 5 ______________________________________ 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 ______________________________________
TABLE 6 ______________________________________ 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 ______________________________________
TABLE 7 ______________________________________ 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 ______________________________________
TABLE 8 ______________________________________ 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 ______________________________________
TABLE 9 ______________________________________ 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 ______________________________________ 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 ______________________________________ 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 ______________________________________ 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 ______________________________________ 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;