USPP14395P2

USPP14395P2 - Royal zoysiagrass

Info

Publication number: USPP14395P2
Application number: US10/193,607
Authority: US
Inventors: Milton Charles Engelke; James Arnold Reinert
Original assignee: Texas A&M University
Current assignee: Texas A&M University
Priority date: 2002-07-11
Filing date: 2002-07-11
Publication date: 2003-12-23
Anticipated expiration: 2022-07-11

Abstract

An asexually reproduced cultivar of perennial zoysiagrass that possess a unique combination of characteristics including purple anthers and white stigmas, an absence of leaf blade hairs, high turf quality and density, good shade tolerance, salinity tolerance, resistance to Rhizoctonia blight and zoysiagrass mite, moderate resistance to tropical sod webworm and hunting billbug, susceptibility to fall army worm and tawny mole cricket and a distinct DNA fingerprint.

Description

Botanical classification: Zoyzia matrella×Zoysia japonica.

Variety denomination: ‘Royal’.

BACKGROUND OF THE INVENTION

This invention relates to a new and distinct perennial zoysiagrass cultivar identified as ‘Royal zoysiagrass’, referred to herein as ‘Royal’. ‘Royal’ is the result of a natural open pollination of material clone TAES-2175 (e.g., K-151). The seedling progenies from the material line were vegetatively increased and tested in a replicated field trial at the Texas Agricultural Experiment Station, Texas A&M University, Dallas, Tex., beginning in 1985. In 1990, several exceptional entries were selected from among the trials, one of which was designated as DALZ9006, which was later named ‘Royal’. The inventive variety exhibits a fine texture typical of Z. matrella-type clones such as ‘Diamond’ (U.S. Plant Pat. No. 10,636), ‘Cavalier’ (U.S. Plant Pat. No. 10,778) and ‘Emerald’ and is useful for home lawns, golf course fairways, tees, green surrounds, recreational sports areas or other applications that involve mowing heights from 1.0 to 5.0 cm.

For purposes of registration under the International Convention for the Protection of New Varieties of Plants (“UPOV”) and noting Section 1612 of the Manual of Plant Examination Procedures, the new variety of zoysiagrass of the present invention is named ‘Royal’.

BRIEF SUMMARY OF THE INVENTION

The present invention relates to a new and distinct asexually reproduced variety of perennial zoysiagrass between 1 to 3 years of age (Zoysia matrella (L.) Merr)×Z. japonica Steud.). The variety name is ‘Royal zoysiagrass’ and is characterized by its purple anthers, white stigmas, an absence of leaf blade hairs and high turf quality among other unique characteristics, all of which are maintained when propagated asexually.

The novel features which are believed to be characteristic of the invention together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present invention, reference is now made to the following descriptions taken in conjunction with the accompanying drawing, in which:

FIG. 1 is a photograph of the leaf blade and ligule of ‘Royal’;

FIG. 2 is a photograph of the inflorescence of ‘Royal’; and

FIG. 3 is a DNA fingerprint of ‘Royal’ as compared to zoysiagrass varieties ‘Meyer’, ‘Emerald’, ‘Crowne’ and ‘Diamond’.

DETAILED DESCRIPTION OF THE INVENTION

CHARACTERISTICS

‘Royal’ was characterized in greenhouse and field conditions and is a unique variety of zoysiagrass. Seeds collected from open pollinated maternal clones of the zoysiagrass germplasm nursery were planted, developed into plugs, and established in small field turf plots. ‘Royal’ demonstrated superior biotic and phenotypic characteristics and, thus, propagated by cuttings of stolons and rhizomes by rooting them in soil and expanding the rooted material to provide planting stock. The planting stock was observed for performance characteristics and for comparison of morphological characters after propagation. The inventive variety has been propagated by sod, plugs, sprigs and stolons. Seed reproduction with self-fertility is not common in the Zoysia spp. No seedling establishment from ‘Royal’ has been observed in either greenhouse or field studies.

‘Royal’ is distinguished from other varieties of zoysiagrass by a combination of characteristics including shade tolerance, salinity tolerance, turf quality, resistance to zoysiagrass mite and Rhizoctonia blight (brown patch) and moderate resistance to tropical sod webworm and hunting billbug. ‘Royal’ is closest in phenotypic appearance to the zoysiagrass variety ‘Emerald’ (unpatented). ‘Royal’ generally demonstrates fair-to-good winter hardiness. Further, the inventive variety grows at an intermediate to rapid rate, and exhibits an intermediate water use requirement. ‘Royal’ produces little thatch with an optimum mowing height of 1 to 5 mm. ‘Royal’ generally grows to cover a plot area within 10-12 months of establishment from 7 mm×10 mm plugs planted on 30 mm centers.

‘Royal’ spreads by both rhizome and stolon growth. The stolons have a mean internode length of 23.6 mm between the fourth and fifth nodes, with a mean internode width of 1.21 mm and node diameter of 1.53 mm (Table 1) (Reinert et al., 2002a). Stolons of ‘Royal’ root adventitiously at the nodes.

The internode stolon color of ‘Royal’ exposed to full sun is 5R 3/2 ; color notations of plant tissues were based on the Munsell Color Charts for Plant Tissues, Munsell Color, Baltimore, Md., 1977. One of ordinary skill in the art recognizes that color notations are affected by light quality, photoperiod, and general growth of the plant. Measured in full-sun under field conditions in August, 2000, the genetic, adaxial leaf color of ‘Royal’ is 2.5G 4/4 to 2.5G 5/2 as compared to ‘El Toro’ (U.S. Plant Pat No. 5,845), which has a leaf color of 2.5 G 5/2 , and ‘Meyer’ (unpatented), which has a color of 2.5 G 4/2 (Munsell, 1977).

The ligule of ‘Royal’ is a row of silky hairs, achieving approximately 1 mm in maximum length. The ligule is illustrated in FIG. 1.

Leaf blades of ‘Royal’ are rolled in the bud, and are flat and stiff. Measurements of the third youngest leaf included a width of 1.36 mm and a length of 8.2 mm (Table 2) (Reinert et al., 2002a), which is significantly narrower and shorter than ‘Meyer’, ‘Crowne’ and ‘El Toro’ varieties. The abaxial/adaxial leaf surfaces lack hairs. Leaf blades are illustrated in FIG. 1.

Measured under greenhouse conditions at Dallas,Tex., January 1996, the flag leaf of ‘Royal’ has a mean length of 5.24 mm. ‘Royal’ has purple anthers and white colored stigmas, undistinguishable in shade of color. The inflorescence is a terminal spike-like raceme, with spikelets on short pedicels (see FIG. 2). ‘Royal’ has a mean culm length of 6.7 cm, and an inflorescence length of 22.9 mm with a mean of 27.6 florets per raceme. The raceme is longer than ‘Diamond’ and more similar in length to ‘Crowne’.

The somatic chromosome number in ‘Royal’ is 40.

‘Royal’ was entered in the National Turfgrass Evaluation Program, National Zoysiagrass Test-1991 (NTEP-1991) and was evaluated alongside 23 other zoysiagrass genotypes at 22 different geographic locations covering 17 states in the United States. The evaluation period lasted 4 years (1992-1995). In the NTEP-1991 test for the years 1992-1995, ‘Royal’ ranked ninth for the last two years and ninth overall in quality among the zoysiagrass genotypes tested (Table 3) (Morris, 1995b). Further, ‘Royal’ had the best density rating among the entries over the 4-yr evaluation period (Table 4) (Morris, 1993; Morris, 1994a; Morris, 1994b; and Morris 1995a).

The Turf Performance Index (TPI) is based on the number of times an entry occurred in the top statistical group, ranked ‘Royal’ in the top grouping 25 times as compared to ‘Cavalier’ (24 top groupings), ‘Emerald’ (23 top groupings) and ‘Diamond’ (22 top groupings). In contrast, the commercial standard varieties, ‘Meyer’ and ‘El Toro’, ranked in the top statistical grouping only 13 and 11 times, respectively. In studies in Griffin, Ga., ‘Royal’ was ranked among the densest turfs having good genetic color (Carrow, 1991; Carrow, 1992).

In the NTEP-1991 evaluation, ‘Royal ’ exhibited good shade tolerance as compared to the other zoysiagrasses. Each genotype was planted and evaluated in a shaded site (ca. 90%) under live-oak trees (Quercus virginiana Mill.) in Dallas, Tex., on September 1992 (Table 5) (Yamamato and Engelke, 1996). Turf performance characteristics evaluated at the shaded site included; turf quality, turf cover, green cover, color, density and texture. Turf cover was evaluated as a percentage of plot area covered with turf, and the TPI was used to evaluate overall turf quality. In general, the varieties took nearly 9 months to spread and cover at least 50% of the plot area. Thereafter, the ‘Royal’, ‘Crowne’, ‘Emerald’, ‘Zorro’ and ‘Diamond’ varieties increased turf cover to greater than 80%. ‘Royal’ ranked fifth behind ‘Diamond’, ‘Zorro’ and ‘Crowne’ among the 25 entries in the trial.

STRESS RESISTANCE

The inventive variety exhibits excellent salt tolerance. Under greenhouse conditions in hydroponics tanks, the salinity was gradually increased from zero to 400 mM NaCl. ‘Royal’ sustained a 33.6% leaf-firing injury, which was similar to ‘El Toro’, ‘Emerald’ and ‘Cavalier’ and significantly less than ‘Meyer’, which sustained 54.3% damage (Marcum et al., 1998).

‘Royal’ is resistant to Rhizoctonia blight and zoysiagrass mite and moderately resistant to tropical sod webworm and hunting billbug. Rhizoctonia blight (brown patch) is caused by the fungal pathogen Rhizoctonia solani Kühn. ‘Meyer’ and ‘Royal’ (10.8 and 15.8% disease infection, respectively) were among the most resistant to the fungus over a 7-day evaluation period when 24 zoysiagrass genotypes were inoculated under ideal disease conditions with the fungal pathogen in a growth chamber at Dallas, Tex. (Table 7) (Metz et al., 1994).

‘Royal’ is resistant to the zoysiagrass mite Eriophyes zoysiae Baker, Kono and O'Neill as compared to ‘Meyer’, ‘Belair’ (unpatented) and many other zoysiagrass genotypes which are very susceptible to the mite (Table 8) (Reinert et al., 1993). This mite has been identified in Maryland, Florida, Texas and other zones of extensive use of zoysiagrass. Under heavy infestation pressure in greenhouse conditions, a mean of 0.2 infested leaves per 5×5 cm plant was observed in the inventive variety. In comparison, ‘Diamond’, ‘Cavalier’, ‘Belair’ and ‘Meyer’ each exhibited greater than 9.4 infested leaves per plant.

The inventive variety is susceptible to fall armyworm (Spodoptera frugiperda J. E. Smith) larvae (Reinert and Engelke, unpublished data) and tawny mole cricket (Scapteriscus vicinus Scudder) (Braman et al., 1994).

‘Royal’ is moderately resistant to feeding by tropical sod webworm (Herpetogramma phaeopteralis Guenée) larvae. The visual rating was 4.6 for the inventive variety as compared to the 1.4 visual rating of ‘Meyer’ (Table 9) (Reinert and Engelke, 2001). The visual rating is determined on a scale of 1-9, with 1=near complete defoliation. Larvae that developed on ‘Royal’ weighed 15.1 mg after 15 days of feeding, which was larger than the 7.2 mg larvae that developed on the most resistant ‘Cavalier’, and one-half the size of larvae that developed on ‘Meyer’ (36.4 mg) (Table 10). Additionally, larvae on ‘Royal’ required 4.4 days longer to develop to adult emergence.

‘Royal’ is moderately resistant to the hunting billbug (Sphenophorus venatus vestitus (Chittenden)) in a cage study with eight other zoysiagrasses in Dallas, Tex. (Table 11) (Reinert et al., 2002b). Compared to ‘Meyer’ and ‘Palisades’, which exhibited 44.4 and 45.5% leaf-firing damage of the plant canopy, respectively, ‘Royal’ expressed 20.95% leaf-firing damage. Evaluation of whole plant growth potential (dry weight) indicated that ‘Royal’ sustained a 53.46% reduction as compared to a 70.2%, a 73.9% and a 73.9% reduction for ‘El Toro’, ‘Meyer’ and ‘Palisades’, respectively. The lower the reduction the greater expression of natural plant resistance.

DNA FINGERPRINTING

Molecular markers have been used widely and successfully for genotyping varieties and species. Amplified Fragment Length Polymorphism (AFLP) is one such highly informative marker assay to generate fingerprints of simple and complex species and cultivars. The fingerprints generated for the identification of the cultivar ‘Royal’ as compared to cultivars ‘Emerald’, ‘Meyer’, ‘Diamond’ and ‘Crowne’ used sixty AFLP primer combinations. Of which, the primer combinations that provided the greatest separation included P-AGA/ M-CAA, P-AGA/ M-CCA, P-AGA/ M-CGT and P-AGA/ M-CTC. The latter primer combination, P-AGA/ M-CCT, allowed amplification of signature bands at 320, 300, 300, 320 and 240 base pair lengths (FIG. 3). These signature bands are useful to identify and differentiate ‘Royal’ cultivar from other varieties tested.

TABLE 1

Rhizome internode length as measured between the fourth and
fifth nodes, internode diameter of the fourth internode, and node
diameter of the fourth node of nine Zoysia cultivars. Plants grown in
sand beds in the field under irrigation during the summer from June
to September 2000, Dallas, TX.

	Internode	Internode	Node
Cultivar	length (mm)	diameter (mm)	diameter (mm)

El Toro	43.6 a¹	1.71 a	2.63 a
Palisades	40.0 ab	1.55 ab	2.48 a
De Anza	34.5 bc	1.39 bc	1.93 cd
Crowne	31.7 cd	1.56 ab	2.36 ab
Cavalier	28.8 cd	1.38 bc	1.88 ed
Zorro	27.0 cd	1.25 c	1.76 de
Meyer	26.5 cde	1.54 ab	2.16 bc
Royal	23.6 de	1.21 c	1.53 e
Diamond	18.4 e	1.19 c	1.56 e
LSD	8.1	0.22	0.31

¹Mean in a column followed by the same letter are not significantly different by Fisher's protected LSD (P = 0.01).
Data taken from Reinert et al., 2002a.

TABLE 2

Leaf blade width and length measured on the third youngest
leaf of nine Zoysia cultivars. Plants were grown in sand beds in the
field under irrigation during the summer from June to September 2000,
Dallas, TX.

Cultivar	Blade width (mm)	Blade length (mm)

El Toro	3.51 ab¹	10.8 abc
Palisades	3.16 b	8.5 bcd
De Anza	1.73 c	6.7 de
Crowne	3.46 ab	11.1 ab
Cavalier	1.58 c	10.0 abc
Zorro	1.35 cd	10.9 ab
Meyer	3.54 a	12.2 a
Royal	1.36 cd	8.2 cd
Diamond	1.09 d	4.4 e
LSD	0.39	2.7

¹Mean in a column followed by the same letter(s) are not significantly different by Fisher's protected LSD (P = 0.01).

TABLE 3

Mean turfgrass quality ratings of 24 zoysiagrass cultivars grown in
the National Turfgrass Evaluation Program; National Zoysiagrass
Test-1991 at 22 locations in the United States (1992-1995).
Turfgrass quality ratings 1-9; 9 ideal turf¹

						Mean
	Overall	Overall	Overall	Overall	Overall	ranking
	mean	mean	mean	mean	mean	1992-
Variety	1992	1993	1994	1995	1992-95	95

Cavalier	5.95	6.23	5.89	5.99	5.93	1
TC 2033	5.85	6.10	6.11	5.96	5.91	2
Sunburst	5.83	5.91	5.81	5.87	5.85	3
TC 5018	5.80	5.81	5.92	5.70	5.81	4
Emerald	5.74	6.21	6.05	5.73	5.79	5
Omni	5.56	6.13	6.06	5.69	5.73	6
QT 2004	5.56	6.01	5.86	5.57	5.63	7
DALZ8508	5.59	6.06	5.74	5.60	5.60	8
Royal	5.65	6.05	5.59	5.54	5.59	9
Palisades	5.82	5.82	5.46	5.44	5.59	9
Crowne	5.80	5.76	5.50	5.45	5.55	11
El Toro	5.78	5.63	5.34	5.41	5.50	12
CD 259-13	5.30	5.53	5.74	5.49	5.40	13
Meyer	5.26	5.70	5.76	5.47	5.39	14
QT 2047	5.37	5.39	5.26	5.16	5.30	15
Belair	4.99	5.58	5.61	5.02	5.16	16
DALZ8516	4.72	5.42	4.96	5.05	4.86	17
Diamond	4.40	5.03	4.58	4.36	4.41	18
DALZ8501	4.88	4.31	3.99	4.05	4.27	19
DALZ8701	4.23	4.10	3.71	3.58	3.85	20
LSD	0.22	0.2	0.2	0.2	0.17

¹To determine statistical differences among entries, subtract one entry's mean from another entry's mean. Statistical differences occur when this value is larger than the corresponding LSD value (P = 0.05).
Data taken from Morris, 1995b.

TABLE 4

Turf performance index for density ratings of the National
Turfgrass Evaluation Program; National Zoysiagrass Test-1991
summarized by season for the 4-yr period (1992- 1995).

Turf Performance Index¹

	Genotype	Spring	Summer	Fall	Total

Royal	6	10	9	25
Cavalier	5	10	9	24
Emerald	7	7	9	23
DALZ8508	5	9	9	23
Diamond	5	9	8	22
Marquis	5	8	9	22
QT 2004	5	8	7	20
DALZ8516	3	8	8	19
Omni	3	7	8	18
DALZ8501	2	4	7	13
Meyer	4	5	4	13
TC 5018	3	4	5	12
Sunburst	3	5	4	12
CD259-13	4	4	4	12
Palisades	3	4	4	11
El Toro	2	4	5	11
Belair	3	3	4	10
QT 2047	3	3	3	9
Crowne	3	3	3	9
DALZ8701	0	3	3	6
TGS-W10	1	2	2	5
JZ-1	0	3	2	5
TGS-B10	0	2	1	3
Korean Common	0	2	1	3

¹Turf Performance Index is the number of times an entry was rated in the top statistical group.
Data taken from Morris, 1993; Morris, 1994a; Morris, 1994b; and Morris 1995a

TABLE 5

Turf Performance Index and percent ground cover for the National
Turfgrass Evaluation Program; National Zoysiagrass Test-1991
planted under 90% shade at Dallas, TX (1992-1995).

	Entry	TPI¹	% plot cover	Rank

Diamond	46	93.9	1
DALZ8516	46	93.9	1
DALZ8508	42	85.7	3
Zorro²	41	83.7	4
Crowne	40	81.6	5
Royal	40	81.6	5
‘Emerald	40	81.6	5
TC2033	40	81.6	5
Palisades	38	77.6	9
Cavalier	36	73.5	10
El Toro	32	65.0	11
DALZ8701	29	59.1	12
CD2013	25	51.0	13
TGS-W10³	25	51.0	13
DALZ8501	24	49.0	15
Sunburst	23	46.9	16
TC5018	22	44.9	17
ITR90-3	19	38.8	18
Korean Common³	17	34.7	19
Belair	16	32.6	21
Meyer	16	32.6	21
TGS-B10³	16	32.6	21
QT2047	15	30.6	23
JZ-1#A89³	13	26.5	24
CD259-13	11	22.4	25
QT2004	10	20.4	26

¹Turf Performance Index is the number of times an entry was rated in the top statistical group Maximum number of observations = 49.
²Evaluated as DALZ9006.
³ Seeded entry.
Data taken from Yamamoto and Engelke, 1996.

TABLE 6

Salinity tolerance of 59 zoysiagrass genotypes in greenhouse
Hoagland's solutions (mean percent salt injury to shoots for 20 rating
dates) tested at Dallas, TX.

Genotype	Zoysia spp.¹	Mean % injury

P9	Z. matrella	32 a²
Diamond	Z. matrella	33 ab
DALZ8501	Z. matrella	33 ab
T38	Z. matrella	33 ab
T16	Z. macrostaychya	33 ab
T14	Z. macrostaychya	33 ab
P47	Z. matrella	33 abc
P2	Z. matrella	33 abc
DALZ8701	Z. matrella	35 a-d
DALZ8508	Z. matrella	37 a-e
P58	Z. sinica	37 a-e
P49	Z. sinica	37 a-e
El Toro	Z. japonica	38 a-e
J239	Z. japonica	38 a-e
P50	Z. sinica	39 a-f
T4	Z. sinica	40 a-g
Royal	Z. matrella	41 a-h
K227	Z. matrella	41 a-h
K12	Z. matrella	41 a-h
K245	Z. japonica	41 a-h
Emerald	Z. matrella x Z. pacifica	41 a-h
Cavalier	Z. matrella	42 a-h
TC2033	Z. matrella	42 a-h
K103	Z. korenia	42 a-h
QT2047	Z. japonica	42 a-h
K260	Z. korenia	43 a-i
K98	Z. korenia	43 b-i
J207	Z. tenuifolia	43 b-i
T44	Z. sinica	45 c-i
J222	Z. matrella	45 d-j
K99	Z. korenia	46 e-j
T21	Z. macrostaychya	46 e-k
Crowne	Z. japonica	46 ek²
Palisades	Z. japonica	46 e-k
J225	Z. matrella	47 e-k
K246	Z. macrostaychya	49 f-k
J3-2	Z. japonica	49 f-k
Belair	Z. japonica	50 f-k
DALZ8516	Z. japonica	50 g-m
Sunburst	Z. japonica	52 h-m
QT2004	Z. matrella	54 i-m
J87-2	Z. japonica	56 j-n
ITR90-3	Z. japonica	56 j-n
K248	Z. macrostaychya	57 j-n
TC5018	Z. japonica	57 k-n
Meyer	Z. japonica	58 l-n
CD2013	Z. matrella	59 l-n
CD259-13	Z. japonica	60 l-o
K254	Z. matrella	61 m-o
JS10-3	Z. japonica	66 n-p
TGS-W10	Z. japonica	66 n-p
K241	Z. japonica	71 o-q
JS23	Z. japonica	73 pq
J94-5	Z. japonica	73 pq
TGS-B10	Z. japonica	73 pq
K157	Z. japonica	74 pq
Korean Common	Z. japonica	76 pq
JZ-1	Z. japonica	79 q
K162	Z. japonica	81 q

¹Species identity is sometimes an estimate.
² Means with the same letter are not significantly different by Waller-Duncan k-ratio t test (k- = 100) (P = 0.05).
Data taken from Marcum et al., 1994.

TABLE 7

Resistance to Rhizoctonia blight (caused by Rhizoctonia solani)
among zoysiagrasses in a laboratory study, Dallas. TX.

	Textural
Cultivar	class¹	Mean % infection²	Mean recovery³

CD2013	3	100.0 a⁴	1.0 a
Korean common	4	77.8 b	1.9 b
Crown	4	76.7 b	2.0 bc
DALZ8701	3	73.0 bc	2.5 def
Sunburst	4	70.0 bcd	2.3 cde
Belair	4	67.5 bcd	1.3 a
GT2047	4	64.2 bcd	2.2 bcd
JZ1A89-1	3	60.8 cd	1.3 a
GT2004	3	57.5 cde	2.2 bcd
DALZ8501	1	55.8 def	2.3 cde
CD259-13	4	53.3 d-g	2.2 bcd
TC5018	4	42.5 e-h	2.3 cde
TGS-W10	4	38.3 e-h	2.2 bcd
El Toro	4	37.5 ghi	2.7 efg
Emerald	3	36.2 ghi	2.3 cde
Palisades	4	35.0 hi	2.5 def
TGS-B10	4	34.2 hi	2.0 bc
DALZ8508	2	32.5 hij	2.8 fg
DALZ8516	2	30.0 hij	2.8 fg
TC2033	3	29.2 hij	2.7 efg
Diamond	1	26.7 h-k	3.0 g
Cavalier	3	20.0 ijk	2.3 cde
Royal	3	15.8 jk	2.5 def
Meyer	2	10.8 k	3.0 g

¹Textural class of zoysiagrass: 1 = short, narrow leaves; 2 = short, wide leaves; 3 = long, narrow leaves; 3 = long, wide leaves.
²Mean foliar blighting percentages from a growth chamber inoculation with Rhizoctonia solani under heavy disease pressure.
³Indicates cultivars recovery from disease and regrowth of leaf tissue in a greenhouse environment, where 3 = best recovery; and 1 = worst recovery.
⁴Means followed by the same letter are not significantly different by Waller-Duncan k-ratio t test (k = 100) (P = 0.05). Only selected means are presented.
Data taken from Metz, 1994.

TABLE 8

Mean number of mite-damaged leaves per zoysiagrass plant in a
greenhouse study infested with high populations of zoysiagrass mite
(Eriophyes zoysia) (18 reps.).

	Leaves with symptoms/plant^1,2
	(date of evaluation)

	Leaf texture			Mean for
Cultivar	class	3 Apr. 1992	24 Apr. 1992	combined dates

Royal	3	0.2 a	0.2 a	0.2 a
DALZ8508	2	0.7 b	0.6 ab	0.6 b
DALZ8516	2	1.8 d	0.3 ab	1.0 b
Emerald	3	1.3 bc	0.9 b	1.1 b
DALZ8501	1	1.4 cd	2.6 c	2.0 c
Crowne	4	5.4 ef	2.3 c	3.9 d
El Toro	4	5.6 ef	2.8 c	4.2 d
TC2033	2	4.4 e	4.3 d	4.4 d
Palisades	4	7.5 fg	4.0 cd	5.8 e
CD2031	2	7.6 gh	7.9 e	7.8 f
Diamond	1	7.8 gh	9.4 ef	8.6 g
DALZ8701	1	9.3 h	9.4 ef	9.4 g
Cavalier	3	9.1 h	9.8 ef	9.5 g
Meyer	2	9.9 h	9.9 ef	9.9 g
Belair	2	10.0 h	9.9 f	9.9 g
JZ-1	4	10.0 h	9.9 f	10.0 g

¹Number of mite infested leaves per plant (>10 = 10). Infested recognized as rolled leaf or hooked leaf tip.
²Data transformed using LOG(N+0.5) for analysis. Means in a column followed the same letter are not significantly different by Waller-Duncan k-ratio t test (k = 100) (P = 0.05).
Data taken from Reinert et al., 1993.

TABLE 9

Visual damage evaluation of zoysiagrass, Zoysia spp. genotypes as an
indication of resistance to the tropical sod webworm, Herpetogramma
phaeopteralis in greenhouse tests at Dallas, TX (16 reps.¹).

	Zoysiagrass Genotype	Visual Damage¹

	DALZ8501	7.4 a²
	Cavalier	7.0 a
	JZ-1	6.6 ab
	CD259-13	5.7 bc
	Crowne	5.6 bcd
	Emerald	5.5 bcd
	DALZ8508	5.3 cd
	DALZ8701	5.0 cd
	CD2031	4.8 cd
	Royal	4.6 d
	TC5018	4.5 de
	Sunburst²	4.5 de
	Diamond	3.5 fg
	Belair	3.5 fg
	El Toro	3.1 g
	Palisades²	3.1 g
	TC2033	2.5 g
	Meyer	1.4 h
	DALZ8516	1.2 h

	¹Worm damage ratings 1 to 9; 1 = near complete defoliation, 9 = no damage.
	²Only 5 replicates were evaluated for Sunburst and Palisades.
	³Means in a column followed by the same letter are not significantly different by Waller-Duncan k-ratio t test (k = 100) (P = 0.05).
	Data taken from Reinert and Engelke, 2001.

TABLE 10

Resistance to tropical sod webworm, Herpetogramma phaeopteralis, in
zoysiagrass (Zoysia spp.): survival, larval and pupa weight and
development time in laboratory no-choice study, Dallas, TX.

15-day-old-larvae

Pupa

Zoysiagrass	Alive	Wt	Alive	wt	Days to
genotype	(%)¹	(mg)²	(%)¹	(mg)³	to pupa⁴

Cavalier	60.0	7.2 ab⁵	40.0	30.6 h	31.0 a
Korean Common	53.3	6.3 a	46.7	34.9 ef	29.6 a
E1 Toro	80.0	6.9 a	66.7	37.S de	27.5 b
DALZ8501	60.0	7.5 ab	60.0	32.0 gh	27.1 bc
Palisades	73.3	10.0 abc	73.3	42.1 abc	25.6 cd
JZ-1	86.7	14.2 abc	80.0	34.0 fg	24.3 de
DALZ8508	86.7	10.7 abc	80.0	36.8 def	24.8 de
Belair	86.3	15.0 bc	80.0	44.3 a	23.6 ef
Crowne	80.0	15.6 c	73.3	37.3 de	24.3 de
Royal	86.7	15.1 bc	73.3	37.8 de	24.2 de
Emerald	73.3	17.1 c	40.0	41.2 bc	22.4 f
Diamond	86.3	37.5 d	86.7	36.8 ef	19.7 g
Meyer	93.3	36.4 d	93.3	43.4 ab	19.4 g
DALZ8516	100	41.0d	100	39.8 cd	19.1 g

Zoysiagrass

Adult

genotype	Alive (%)¹	Days to adult⁴

Cavalier	33.3	39.4 a
Korean Common	46.7	38.4 ab
E1 Toro	66.7	36.7 bc
DALZ8501	60.0	36.2 c
Palisades	66.7	35.3 cd
JZ-1	60.0	33.9 de
DALZ8508	73.3	33.4 e
Belair	66.7	33.0 ef
Crowne	66.7	33.0 ef
Royal	53.3	32.9 ef
Emerald	40.0	31.3 f
Diamond	86.6	28.9 g
Meyer	86.6	28.6 g
DALZ8516	93.3	28.5 g

¹Mean percentage of larvae alive at 15 day after agg hatch, at pupation and at adult emergence.
²Mean weight of surviving larvae after feeding on each genotype for 15 days.
³Mean pupa weight for only individuals that pupated (weight taken with 1 day of pupation).
⁴Mean number of days from egg hatch to pupation and adult emergence for larvae on each grass
⁵Means in a column followed by the same letter are not significantly different by Waller-Duncan k-ratio t test (k = 100) (P = 0.05).
Data taken from Reinert and Engelke, 2001.

TABLE 11

Resistance among zoysiagrass cultivars to larval feeding by
the hunting billbug (Sphenophorus venatus vestitus),
Dallas, TX (June-September 2000).
Plant response

		Plant canopy damage	Total plant mass
Cultivar	Species¹	% leaf-firing²	% reduction³

Diamond	Zm	6.08 a⁴	26.29 a
Zorro	Zm	9.76 ab	35.72 ab
Cavalier	Zm	27.58 bc	48.89 bc
Royal	Zm	20.95 abc	53.46 cd
Crowne	Zj	40.55 cd	65.42 de
De Anza	Zj	21.90 abc	68.64 de
El Toro	Zj	24.93 abc	70.24 e
Meyer	Zj	44.38 d	73.90 e
Palisades	Zj	45.49 d	76.10 e

¹ Zm = Zoysia matrella; Zj = Z. japonica.
² Leaf-firing was considered as an above ground symptom expression of the root feeding damage by billbug larvae. Plants were ranked on a scale of 1-9, 1 = severe leaf firing, 9 = no leaf firing. The % damage = [(check − treatment) / check] × 100.
³% reduction for cultivar = [(amount in check) − (amount in treatment) / check] × 100.
⁴ Means in a column not followed by the same letter are significantly different by LSD test (P < 0.05).
Data from Reinert et al., 2002b.

As one of ordinary skill in the art will readily appreciate from the disclosure of the present composition of matter may be utilized according to the present invention. Accordingly, the appended claim is intended to include within its scope such compositions.

REFERENCES

Patents

U.S. Plant Pat. No. 5,845

U.S. Plant Pat. No. 11,570

U.S. Plant Pat. No. 10,778

U.S. Plant Pat. No. 10,636

U.S. Plant Pat. No. 10,187

Publications

Braman, S. K., A. F. Pendley, R. N. Carrow and M. C. Engelke. 1994. Potential resistance in zoysiagrasses to the tawny mole crickets (Orthoptera:Gryllotalpidae) FL Entomol. 77(3): 301-305.

Carrow, R. N. 1991. Zoysiagrass performance, water use, and rooting as affected by traffic and nitrogen. USGA Annu. Rep., Univ. of GA., Griffin, Ga. 5p. 1 table.

Carrow, R. N. 1992. Zoysiagrass performance, water use, and rooting as affected by traffic and nitrogen. USGA Annu. Rep., Univ. of GA, Griffin, Ga. 18 p. 11 tables.

Marcum, K. B., S. J. Anderson and M. C. Engelke. 1998. Salt gland ion secretion: A salinity tolerance mechanism among five zoysiagrass species. Crop. Sci. 38: 806-810.

Metz, S. P., P. F. Colbaugh and M. C. Engelke. 1994a. Rhizoctonia blight on inoculated zoysiagrasses. APS BCT Test Data 9: 158.

Morris, K. 1993. National zoysiagrass test—1991, Progress report 1992. Nat. Turfgrass Eval. Prog. USDA-ARS, Beltsville, Md. NTEP No. 93-4: 32 p.

Morris, K. 1994a. National zoysiagrass test—1991, Progress report 1993. Nat. Turfgrass Eval. Prog. USDA-ARS, Beltsville, Md. NTEP No. 94-5: 54 p.

Morris, K. 1994b. National zoysiagrass test—1991, Progress report 1994. Nat. Turfgrass Eval. Prog. USDA-ARS, Beltsville, Md. NTEP No. 95-8: 66 p.

Morris, K. 1995a. National zoysiagrass test—1991, Progress report 1995. Nat. Turfgrass Eval. Prog. USDA-ARS, Beltsville, Md. NTEP No. 96-6: 54 p.

Morris, K. 1995b. National zoysiagrass test—1991, Final report 1992-95. Nat. Turfgrass Eval. Prog. USDA-ARS, Beltsville, Md. NTEP No. 96-15: 101 p.

Munsell Color Service. 1977. Munsell soil and plant tissue chart. GretagMacbeth, New Windsor, N.Y.

Reinert, J. A. and M. C. Engelke. 2001. Resistance in zoysiagrass, Zoysia spp., to the tropical sod webworm, Herpetogramma phaeopteralis Guenee. Int. Turfgrass Soc. Res. J. 9: 798-801.

Reinert, J. A., M. C. Engelke, J. E. McCoy, D. L. Hays, D. Genovesi and J. J. Heitholt. 2002a. Growth characteristics of nine Zoysia cultivars. (unpublished manuscript).

Reinert, J. A., M. C. Engelke, J. E. McCoy, D. L. Hays and J. J. Heitholt. 2002b. Resistance in zoysiagrass (Zoysia matrella) to the hunting billbug (Sphenophorus venatus vestitus). (unpublished manuscript).

Reinert, J. A., M. C. Engelke, and S. J. Morton. 1993. Zoysiagrass resistance to the zoysiagrass mite, Eriophyes zoysiae (Acari: Eriopyidae). Int. Turfgrass Soc. Res. J. 7: 349-352.

White, R. H., M. C. Engelke, S. J. Morton and B. A. Ruemmele. 1993. Irrigation water requirement of zoysiagrass. Int. Turfgrass Soc. Res. J. 7: 587-593.

Yamamoto, I. and M. C. Engelke. 1996. 1996 update of zoysiagrass performance under 90% shade conditions. TX Turfgrass Res.-1996. Consolidated Prog. Rep. TURF-96-11: 65-72.

Claims

What is claimed is:

1. A new and distinct cultivar of an asexually reproduced Zoysia matrella plant, as herein illustrated and described.