Section 7
Chapter 6,321

Resistance of st augustine grass stenotaphrum secundatum to southern chinch bug blissus insularis and st augustine decline strain of panicum mosaic virus

Reinert, J.A.; Bruton, B.D.; Toler, R.W.

Journal of Economic Entomology 73(4): 602-604


ISSN/ISBN: 0022-0493
Accession: 006320899

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Accessions (3) and 2 cultivars of St. Augustinegrass, S. 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 cultivar Floratam. FA-108 and TX-33 also expressed resistance to B. insularis Barber. After 7 days in laboratory experiments, adult southern chinch bugs confined to FA-108, 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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