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S.K. Braman, R.R. Duncan, and M.C. Engelke

Turfgrass selections including 21 paspalums (Paspalum vaginatum Swartz) and 12 zoysiagrasses (Zoysia sp.) were compared with susceptible `KY31' tall fescue (Festuca arundinacea Schreb.) and more resistant common bermudagrass (Cynodon dactylon Pers.) and common centipedegrass [Eremochloa ophiuroides (Munro.) Hack] for potential resistance to fall armyworm [Spodoptera frugiperda (J.E. Smith)], an occasionally serious pest of managed turf. Turfgrass and pasture grasses annually suffer sporadic damage by this pest, often severe in the Gulf Coast states. Resistant grasses offer an alternative management tool for the fall armyworm, reducing the need for pesticide use. Laboratory evaluations assessed the degree of antibiosis and nonpreference present among more than 30 turfgrass genotypes to first and third instar fall armyworms, respectively. Zoysiagrasses exhibiting high levels of antibiosis included `Cavalier', `Emerald', DALZ8501, DALZ8508, `Royal', and `Palisades'. Paspalum selections demonstrating reduced larval or pupal weights or prolonged development times of fall armyworm included 561-79, Temple-2, PI-509021, and PI-509022.

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S.K. Braman, R.R. Duncan, W.W. Hanna, and W.G. Hudson

Bermudagrass (Cynodon sp.) and paspalum (Paspalum vaginatum) genotypes were evaluated in laboratory, greenhouse, and field experiments for potential resistance to the common turfgrass pests, tawny mole cricket (Scapteriscus vicinus Scudder) and southern mole cricket (Scapteriscus borellii Giglio-tos). Potential resistance among 21 seashore paspalums to both insects in an environmental chamber at 27 °C, 85% relative humidity, and 15 hours light/9 hours dark) revealed that Glenn Oaks `Adalayd' was least tolerant of cricket injury, while 561-79, HI-1, and `Excalibur' were most tolerant. Nymphal survival was not influenced by turfgrass type. Plant selections that maintained the highest percentage of their normal growth after 4 weeks of feeding by tawny mole crickets over three separate greenhouse trials were 561-79, HI-1, HI-2, PI-509018, `Excalibur', SIPV-1 paspalums, and `Tifeagle' and `Tifsport' bermudagrasses. Although none of the tested genotypes was highly resistant to tawny mole cricket injury, `TifSport' bermudagrass and 561-79 (Argentine) seashore paspalum were most tolerant.

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Karl Guillard, Richard J.M. Fitzpatrick, and Holly Burdett

, 1969 ; Taylor and Schmidt, 1980 ), and these should influence the selection of grasses for sod production. In general, higher rates of N are associated with lower sod strength measurements than those obtained at lower N rates ( Hall, 1980 ; Li et al

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Ronnie W. Schnell, Donald M. Vietor, Richard H. White, Tony L. Provin, and Clyde L. Munster

reduced soil bulk density 19.7% for a loam soil and 16.7% for a clay soil, which increased water content and retention for both soils. In addition to benefits during sod production, increases in soil water retention for sod grown with compared to without

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Moriah Bellenger, Deacue Fields, Kenneth Tilt, and Diane Hite

tremendous growth in mechanization and technological advances in the horticultural industry, nursery, greenhouse, and sod production remains very labor-intensive. As a result of the perishable nature of horticultural goods, a skilled and accessible labor

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Jennifer A. Kimball, M. Carolina Zuleta, Matthew C. Martin, Kevin E. Kenworthy, Ambika Chandra, and Susana R. Milla-Lewis

purity in clonally propagated cultivars through the detection of genetic variants in sod production fields and turfgrass breeding programs. Very little information is available regarding the movement of ‘Raleigh’ sod to and from specific sod farms across

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Xunzhong Zhang and Erik H. Ervin

Cool-season turfgrass species such as kentucky bluegrass (KBG) and tall fescue (TF) are widely used for sod production, lawns, and athletic fields in the United States and other temperate parts of the world. Previous studies have shown that

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Juming Zhang, Michael Richardson, Douglas Karcher, John McCalla, Jingwen Mai, and Hanfu Luo

was considered by the authors to be a desirable level of coverage for sports turf or sod production. Confidence intervals (95%) were calculated for DOY 50 and DOY 90 parameter estimates to compare treatment levels. Within species and years, treatment

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D.L. Turner, S.S. Sharpe, and Ray Dickens

1 Research Associate. 2 Graduate Research Assistant. 3 Professor of Turf Management. Alabama Agr. Expt. Sta. Journal Series no. 3-881823P. We thank Beck's Zoysia and Nursery, Auburn, Ala., for the donation of sod production areas for these

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L.B. McCarty

The effects of single and sequential applications of currently available herbicides at 0.5X and lX rates on St. Augustinegrass sod production were investigated. single applications were made immediantely after the field was harvested, and remaining ribbons tilled and rolled, while sequential applications were applied approximately six months later. Sod was harvested one year after the initial application with tensile strengths and root core weight recorded. Data will be presented on the herbicide treatment rates and number of application effects on sod tensile strength and root mass.