Registration of ‘Chisholm’ Zoysiagrass

Abstract

Chisholm' (Reg. No. CV-273, PI 666039) is a zoysiagrass (Zoysia japonica Steud.) approved for release by Texas A&M AgriLife Research, Dallas, TX, and the Kansas Agricultural Experiment Station, Manhattan, KS. Chisholm is a clonal selection made in 1997 from a germplasm nursery established in 1983 in Dallas. It was originally evaluated under the designation TAES 4436 and included in the 2002 National Turfgrass Evaluation Program Zoysiagrass Variety Test under the designation DALZ 0102. Chisholm has a texture coarser than 'Meyer' and intermediate to 'JaMur' and 'Palisades'. Freezing tolerance of Chisholm is equivalent to, or slightly poorer than, Meyer, but it is superior to Meyer for establishment rate from vegetative plugs; turfgrass quality; growth under shade; fall color; resistance to bluegrass billbug (Sphenophorus parvulus Gyllenhal), zoysiagrass mite (Eriophyes zoysiae Baker, Kono, and O'Neill), and take all patch [caused by Gaeumannomyces graminis var. graminis (Sacc.) Arx & D.L. Olivier]; recovery from divots; and seed head production (fewer produced). Improvement over Meyer in these traits will potentially increase the utility of zoysiagrass in the transition zone. Chisholm is well suited for use on lawns and golf courses in the transition zone, particularly those areas in zones 6b or higher on the USDA Plant Hardiness Zone map.

Registration of ‘KSUZ 0802’ Zoysiagrass

“…KSUZ 0802 had higher plot coverage compared with Meyer in Wichita, KS, and Knoxville, TN. The average across all nine locations showed that the establishment of KSUZ 0802 (74.0%) was similar to both Chisholm (76.7%) and Meyer (67.2%), but Chisholm had a greater establishment rate than Meyer, which is in agreement with Chandra et al (2015). KSUZ 0802 and Chisholm were in the top statistical group in all nine locations, whereas Meyer was only a top performer in five of the locations.…”

“…Meyer is susceptible to bluegrass billbug injury, and Chisholm has been shown to exhibit excellent resistance (Chandra et al, 2015). Data collected at Manhattan, KS (Table 8; Fry and Cloyd, 2011), demonstrated that KSUZ 0802 had significantly less bluegrass billbug damage than Meyer in 2009 and 2010.…”

“…Zoysia japonica ‘Meyer’ (Grau and Radko, 1951) has been the predominant cultivar used in the transition zone since 1952 because of its excellent freezing tolerance. A recently released Z. japonica cultivar, ‘Chisholm’ (Chandra et al, 2015), has freezing tolerance that is comparable or slightly poorer than Meyer, but with a superior rate of establishment, turf quality, growth under shade, and tolerance to pests compared with Meyer. Both Meyer and Chisholm exhibit medium‐coarse to coarse leaf texture suitable for lawns and golf course fairways.…”

Zoysiagrass (Zoysiaspp.) History, Utilization, and Improvement in the United States: A Review

“…Three releases resulted from these breeding efforts and include Diamond (Engelke et al, 2002a), Palisades (Engelke et al, 2002d), and Crowne (Engelke et al, 2002c). In 2007, Dr. Ambika Chandra assumed direction of this program and released Chisholm zoysiagrass in cooperation with Dr. Jack Fry at Kansas State University (Table 4) (Chandra et al, 2015). More recently, Texas A&M University and Kansas State University worked cooperatively to release KSUZ 0802, a dense, fine‐textured Z. matrella × Z. japonica hybrid that has cold hardiness comparable with Meyer (Table 4) (Chandra et al, 2017a).…”

Colorant Application Volume and Color Persistence on a ‘Chisholm’ Zoysiagrass Lawn

“…'Chisholm' zoysiagrass is a suitable turfgrass for residential and commercial lawns, parks, and golf courses in the transition zone (Chandra et al, 2014). In Kansas, 'Chisholm' usually takes on a straw-brown color of dormancy in October and begins to greenup in mid to late April as noted in studies during its development when it was evaluated under the experimental designation DALZ0102 (Okeyo et al, 2011).…”