Abstract
Three accessions and two cultivar of St. Augustine grass, Stenotaphrum secundatum (Walt,) Kuntze, (FA-108, FA-2002, TX-33 ‘Raleigh’, and ‘Seville’) exhibited resistance to the St. Augustine decline strain of Panicum mosaic virus (SAD-PMV) at a level equal to the resistance found in the cultival ‘Floratam.’ FA-108 and TX-33 also expressed resistance to Blissus insularis Barber. After 7 days in laboratory experiments, adult southern chinch bugs confined to FA-I08, TX-33, and Floratam had mortalities of 80.0, 65.8, and 66.7%, respectively, compared to only 10.8% when confined on ‘Florida Common.’ Mortalities of 5th instars at 7 days were 82, 80, and 72%, respectively, for the same grasses compared to 20% on Florida Common. Egg deposition on the 3 resistant varieties also was reduced significantly.
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