ISU Horticulture Publications: 2002 Turfgrass Report

Perennial Ryegrass Studies

R. A. St. John and N. E. Christians

This was the second year of the trial that began in the fall of 1999 with the establishment of 134 cultivars of perennial ryegrass at the Iowa State University Horticulture Research Station. The study was established on an irrigated area that was maintained at a 2-inch mowing height and fertilized with 3 to 4 lb N/1000 ft²/yr. The area received herbicide treatments as required.

Cultivars were evaluated for turf quality May through October of 2001. Visual quality was assessed using a 9 to 1 scale with 9 = best, 6 = lowest acceptabe, and 1 = worst quality. The values listed under each month in Table 1 are the averages of ratings made on three replicated plots for the three studies. Yearly means of data from each month are listed in the last column. The cultivars are listed in descending order of average quality. The last row list the LSD (least significant difference), which is a statistical measurement of how widely the means must vary before they are considered to be different from one another.

Data for genetic color (Gencol), spring greenup (Gnup), and leaf texture (Ltex) also are included. The cultivars were rated for genetic color in July and the values were made using a 9 to 1 scale with 9 = dark and 1 = light green. Spring greenup data were taken in April and were estimated using a 9 to 1 scale with 9 = green and 1 = dormant turf. Leaf texture was rated on the same scale with 9=finest texture.

Table 1. The 2001 visual quality and other ratings for the 1999 National Perennial Ryegrass Study

				Quality
CULTIVAR	GENCOL	GNUP	LTEX	MAY	JUN	JUL	AUG	SEP	OCT	MEAN
				9 to 1; 9 = high rating
ALL STAR2 (CIS-PR-78)	8.0	5.7	8.0	5.0	7.7	8.3	9.0	8.7	8.0	7.8
PINNACLE II (BAR 9 B2)	9.0	6.0	8.3	5.0	8.7	7.7	9.0	8.7	8.0	7.8
APR 1232	7.7	5.0	8.0	5.3	8.7	7.7	8.0	8.0	8.0	7.6
ROBERTS-627	8.0	6.0	8.0	5.3	8.0	8.3	8.3	8.0	7.3	7.6
WILMINGTON	8.7	5.3	8.0	5.0	8.3	7.7	8.3	8.3	7.7	7.6
MONTEREY II (JR-187)	7.7	5.0	8.0	5.0	8.3	7.7	7.7	8.3	8.0	7.5
ALLSPORT	7.0	4.7	8.0	5.3	8.0	7.0	8.0	8.0	8.0	7.4
AMAZING (B1)	8.3	5.7	8.0	5.0	8.3	7.7	7.7	8.3	7.3	7.4
BRIGHTSTAR SLT (PST-2A6B)	7.0	5.3	8.0	5.3	7.3	7.3	7.7	8.3	8.3	7.4
CAS-LP84	8.0	5.0	8.0	4.3	8.0	7.3	8.3	8.3	8.0	7.4
CUTTER II (PICK RC2)	8.3	5.7	8.3	5.7	8.7	7.7	8.0	7.3	7.0	7.4
EXACTA	8.0	6.0	8.0	5.3	8.3	7.3	7.7	8.0	7.7	7.4
GATOR 3 (CIS-PR-85)	8.3	5.7	8.0	5.3	7.3	7.7	8.3	8.0	7.7	7.4
MB 414 (ABT-99-4.903)	8.0	5.3	8.0	4.7	8.3	7.0	8.3	8.7	7.3	7.4
PENNANT II	7.7	4.7	8.0	4.7	8.3	7.0	8.3	8.0	8.0	7.4
PICK MDR	9.0	6.0	8.0	5.0	8.7	7.0	8.3	8.0	7.7	7.4
PROMISE	8.3	5.3	8.0	5.0	8.0	7.7	7.7	8.3	7.7	7.4
PST-2LA	7.7	4.7	8.0	4.3	8.0	8.3	8.0	8.0	8.0	7.4
R8000	7.7	4.7	8.0	4.7	7.3	8.0	7.7	8.3	8.3	7.4
RADIANT	8.7	6.3	8.0	5.0	8.3	7.7	8.3	8.0	7.3	7.4
ABT-99-4.560	8.0	5.3	8.3	4.7	7.7	7.3	8.3	8.3	7.7	7.3
ABT-99-4.834	8.0	5.3	8.0	4.3	7.3	8.0	8.0	8.3	7.7	7.3
BARLENNIUM	7.7	4.7	8.0	4.7	7.7	8.3	8.3	7.7	7.3	7.3
CABO (CIS-PR-80)	8.7	5.7	8.0	4.3	8.3	7.3	8.0	8.3	7.7	7.3
CHARISMATIC (LTP 98-501)	8.3	5.7	8.3	4.7	8.7	7.3	7.3	8.3	7.7	7.3
CIS-PR-75	8.3	5.0	8.0	4.7	7.7	7.7	8.3	8.0	7.3	7.3
KOKOMO (CIS-PR-69)	8.3	5.7	8.7	4.7	8.3	7.3	8.0	7.7	7.7	7.3
LTP-ME	7.7	4.7	8.0	4.3	8.0	7.7	8.0	8.3	7.7	7.3
MANHATTAN (PST-2CRL)	8.0	4.7	8.0	4.7	7.3	7.7	8.3	8.0	8.0	7.3
PARADIGM (APR 1236)	8.3	5.3	8.0	5.0	8.3	7.7	7.3	7.7	8.0	7.3
PARAGON	7.3	5.3	8.0	4.3	8.3	7.3	8.0	8.3	7.7	7.3
PICK PR QH-97	8.0	5.7	8.3	5.7	8.0	6.7	7.7	8.0	7.7	7.3
PIZZAZZ	8.3	5.3	8.0	4.3	7.3	7.0	9.0	8.7	7.7	7.3
PST-2CRR	8.0	6.0	8.0	5.7	8.0	6.3	8.3	8.0	7.7	7.3
SRX 4801	7.3	5.0	8.3	4.3	8.0	7.7	8.3	8.3	7.3	7.3
ABT-99-4.464	7.0	4.7	8.0	4.7	7.7	6.7	7.7	8.3	8.3	7.2
ABT-99-4.815	7.0	5.0	8.0	4.7	7.7	7.7	8.0	7.7	7.7	7.2
ABT-99-4.965	8.7	4.7	8.0	3.7	7.7	7.7	8.3	8.3	7.3	7.2
CATALINA	7.3	5.0	8.0	4.3	7.3	7.3	7.7	8.7	7.7	7.2
CHARGER II	7.7	4.7	8.0	4.7	7.7	7.7	8.0	8.0	7.3	7.2
DIVINE	7.7	5.3	8.0	4.3	8.3	7.0	8.0	7.7	7.7	7.2
DLF-LDD	8.0	5.3	8.0	4.7	7.7	7.7	7.7	8.0	7.3	7.2
MEPY	7.3	5.7	8.0	5.0	7.3	7.3	7.7	8.3	7.7	7.2
MP88	8.0	5.0	8.0	4.0	7.3	7.3	8.0	8.7	8.0	7.2
PACESETTER (6011)	8.0	4.0	8.0	4.3	8.0	7.7	7.3	8.3	7.7	7.2
PANTHER	7.0	4.7	8.0	4.7	7.7	7.3	7.7	8.0	7.7	7.2
PROSPORT (AG-P981)	7.7	4.7	8.7	4.0	7.7	7.7	8.0	8.0	7.7	7.2
PST-2RT	7.7	5.3	8.0	4.7	7.7	7.7	7.7	8.0	7.7	7.2
SRX 4RHT	8.3	5.7	8.0	4.7	8.3	7.0	8.0	8.0	7.3	7.2
UT-1000 (ABT-99-4.709)	7.7	5.0	8.0	4.0	7.3	7.7	8.3	8.0	8.0	7.2
ABT-99-4.115	8.0	5.3	8.0	4.0	7.7	7.0	7.7	8.3	7.7	7.1
ABT-99-4.721	8.0	5.7	8.0	4.3	8.0	7.0	7.7	7.7	7.7	7.1
APPLAUD (PENNINGTON-11301)	8.0	4.3	8.3	3.7	7.3	8.0	8.0	8.0	7.3	7.1
APR 1233	7.3	4.3	8.0	3.7	8.0	8.0	7.7	7.7	7.3	7.1
ASCEND	9.0	5.3	8.0	4.0	8.3	6.7	8.0	7.7	8.0	7.1
CALYPSO II	7.3	5.3	8.0	4.7	8.3	6.7	7.7	7.7	7.7	7.1
CHURCHILL	8.3	5.0	8.0	3.3	8.0	7.7	7.7	8.0	7.7	7.1
CIS-PR-84	8.0	4.0	8.0	3.3	7.3	7.3	8.3	8.3	7.7	7.1
EPD	7.0	4.7	8.0	4.0	7.7	7.7	7.7	8.0	7.3	7.1
JET	8.0	4.7	8.0	3.7	7.7	7.0	8.0	8.3	8.0	7.1
MAJESTY	7.7	4.3	8.3	4.3	7.7	7.3	7.7	7.7	8.0	7.1
MANHATTAN 3	7.3	4.3	8.0	4.0	8.0	7.3	8.0	7.3	7.7	7.1
MB 411 (ABT-99-4.753)	8.0	4.7	8.0	3.7	8.0	6.3	8.0	8.3	8.3	7.1
NEXUS	8.7	4.3	8.3	3.7	7.7	8.0	8.3	8.0	7.0	7.1
PHANTOM	8.3	4.3	8.0	3.7	8.0	7.3	7.7	8.3	7.7	7.1
PICK PRNGS	7.7	4.7	8.0	4.3	8.0	6.7	7.7	8.0	7.7	7.1
PST-2BR	8.3	4.0	8.0	3.3	7.0	8.3	8.0	8.3	7.7	7.1
PST-2SBE	7.7	4.3	8.0	4.0	7.7	7.7	7.7	8.3	7.3	7.1
SALINAS (PST-2SLX)	8.0	5.3	8.0	4.3	7.3	6.7	7.7	8.3	8.0	7.1
A5C (ABT-99-4.960)	8.0	4.3	8.0	4.3	7.3	8.0	7.7	8.0	6.7	7.0
ABT-99-4.339	8.0	4.7	8.0	5.3	8.0	7.0	8.0	5.7	8.0	7.0
ADMIRE (JR-151)	7.7	4.3	8.0	4.3	8.3	8.0	7.0	7.3	7.0	7.0
APR 1237	7.3	4.0	8.0	4.7	8.0	6.3	7.7	8.0	7.3	7.0
BRIGHTSTAR II	7.3	4.7	8.0	4.0	7.3	7.3	7.7	8.0	7.7	7.0
MB 412 (ABT-99-4.461)	8.7	4.7	8.0	3.3	7.3	8.0	7.7	8.3	7.3	7.0
MP103	7.5	5.5	8.0	4.0	7.5	6.5	8.0	8.0	8.0	7.0
SEVILLE II	8.0	4.0	8.0	3.7	7.7	7.0	8.0	8.0	7.7	7.0
SKYHAWK	7.7	4.3	8.0	4.0	7.3	7.7	7.7	7.7	7.7	7.0
STELLAR (CIS-PR-72)	8.0	4.7	8.0	3.3	7.3	7.7	8.0	8.0	7.7	7.0
AFFIRMED	7.7	5.0	8.0	4.3	8.3	6.3	7.3	8.0	7.3	6.9
FIESTA 3	8.0	3.3	8.0	3.7	8.0	6.7	8.0	8.0	7.3	6.9
GALAXY (JR-128)	7.3	4.0	8.0	4.3	7.3	6.7	7.7	7.7	7.7	6.9
LPR 98-143	7.3	4.7	8.0	4.3	8.3	7.0	7.0	7.7	7.3	6.9
MB 410 (ABT-99-4.629)	8.3	4.7	8.0	4.0	7.7	6.3	8.0	8.3	7.3	6.9
MP107	8.0	4.7	8.0	3.0	7.7	7.0	7.7	8.3	8.0	6.9
PICK PR B-97	8.0	5.0	8.0	3.7	7.7	7.3	7.7	7.7	7.3	6.9
PLEASURE XL	7.0	4.0	8.0	3.7	7.3	6.7	8.0	8.3	7.3	6.9
PST-2JH	7.0	4.0	8.3	3.7	7.3	7.7	7.7	8.0	7.3	6.9
PST-2L96	8.0	4.7	8.0	4.0	7.3	8.0	7.3	7.7	7.3	6.9
SRX 4120	7.7	5.0	7.7	5.0	7.7	6.3	7.3	7.7	7.7	6.9
SUPERSTAR (EP57)	7.7	4.7	8.0	3.3	8.0	6.3	7.7	8.3	7.7	6.9
ABT-99-4.600	7.0	3.7	8.0	3.0	7.3	7.0	8.0	7.3	8.0	6.8
ABT-99-4.625	8.0	4.7	8.0	4.0	7.0	8.3	7.3	7.7	6.7	6.8
ABT-99-4.724	7.0	4.3	8.0	4.3	7.3	6.7	8.0	7.7	7.0	6.8
ELFKIN	7.0	4.3	8.3	4.7	7.0	7.3	7.0	7.7	7.3	6.8
MB 413 (ABT-99-4.633)	8.3	5.0	8.0	3.3	7.3	6.7	8.0	8.0	7.3	6.8
MDP	8.0	5.3	8.0	4.0	7.0	7.0	7.3	8.0	7.3	6.8
NJ-6401	8.0	3.7	8.0	3.0	8.0	6.3	8.7	7.3	7.3	6.8
PROWLER (APR 777)	7.0	4.0	8.0	4.3	7.3	7.0	7.3	7.7	7.3	6.8
PST-CATS	8.0	4.0	8.0	2.3	7.3	6.3	8.3	8.3	8.0	6.8
RACER	8.0	4.7	8.0	4.0	7.7	6.3	8.0	7.3	7.3	6.8
SR 4500	7.3	4.7	8.0	4.3	7.3	7.0	7.3	7.3	7.3	6.8
SRX 4820	8.0	4.3	8.3	4.0	7.7	6.7	7.7	8.0	7.0	6.8
WVPB-R-82	6.0	4.3	8.3	4.7	7.0	7.3	7.0	7.7	7.0	6.8
APR 776	7.0	4.3	8.3	3.7	7.3	7.3	7.3	7.3	7.3	6.7
KOOS R-71	6.3	4.0	8.0	4.0	7.0	7.0	7.0	7.3	7.7	6.7
PALMER III	7.3	4.0	8.0	3.3	7.7	7.0	7.3	7.7	7.3	6.7
PASSPORT	7.0	4.0	8.0	4.7	7.3	6.7	7.0	7.3	7.0	6.7
PST-2M4	8.0	3.0	8.0	2.7	7.7	7.3	8.0	7.7	7.0	6.7
APR 1231	7.3	3.7	8.0	3.7	7.7	5.7	7.7	7.3	7.7	6.6
APR 1235	8.0	4.0	7.7	3.3	8.0	7.0	7.0	7.3	6.7	6.6
CATHEDRAL II	8.0	4.3	8.3	4.0	7.7	6.7	7.0	7.3	7.0	6.6
EDGE	6.7	4.0	7.7	3.3	7.7	7.3	6.3	7.0	7.7	6.6
EP53	7.7	4.3	8.0	3.0	7.0	6.7	7.7	8.0	7.0	6.6
EXTREME (JR-317)	7.0	3.7	8.0	3.3	7.3	7.0	7.0	7.7	7.3	6.6
HEADSTART	7.3	4.3	8.0	3.7	7.7	7.0	6.7	7.3	7.0	6.6
LINE DRIVE	8.0	4.3	8.0	3.3	7.3	7.3	7.0	7.3	7.3	6.6
PICK EX2	6.7	4.3	8.0	4.3	7.7	6.3	6.7	7.7	7.0	6.6
PREMIER	6.7	3.0	8.0	3.7	7.0	7.0	7.0	7.7	7.3	6.6
PREMIER II	7.7	3.7	8.0	3.3	7.3	6.7	7.3	7.7	7.3	6.6
SECRETARIAT	7.0	4.0	8.0	4.7	7.3	6.3	6.7	7.0	7.7	6.6
APR 1234	7.3	3.0	7.7	3.0	7.7	6.7	7.3	7.0	7.0	6.4
DP LP-1	6.3	4.7	7.3	3.7	7.0	7.0	6.7	7.0	7.3	6.4
LPR 98-144	7.0	4.0	8.0	4.0	7.0	6.0	7.3	7.3	7.0	6.4
PICK PR 1-94	8.3	4.3	8.3	3.3	7.3	6.3	7.3	7.7	6.7	6.4
BUCCANEER	6.0	3.7	8.0	3.7	7.3	6.3	6.3	7.0	7.3	6.3
BY-100	6.7	4.0	8.0	4.0	7.3	5.7	6.7	7.0	7.0	6.3
WVPB-R-84	6.3	3.3	8.0	3.0	7.3	6.7	6.0	7.3	7.3	6.3
DP 17-9069	6.3	4.0	8.3	3.3	7.0	6.7	6.0	7.0	7.3	6.2
YATSUGREEN	6.3	3.7	7.3	3.0	7.3	7.3	6.0	7.0	6.3	6.2
AFFINITY	7.0	3.3	8.0	3.0	7.3	5.3	6.7	7.0	6.7	6.0
DP 17-9391	6.7	3.0	7.7	2.7	7.0	6.3	5.7	7.3	6.3	5.9
DP 17-9496	6.0	3.0	6.7	2.0	6.3	6.7	5.0	6.3	6.0	5.4
LINN	6.0	2.3	7.0	1.7	5.3	5.7	4.3	6.3	5.7	4.8

LSD (0.05)	1.1	1.9	0.6	3.8	3.1	2.5	1.1	1.5	1.7	1.0

ISU Horticulture:Publications:2002 Turfgrass Report

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