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St. Augustinegrass antibiosis to southern chinch bug (Hemiptera: Lygaeidae) and to St. Augustine decline strain of panicum mosaic virus

, : St. Augustinegrass antibiosis to southern chinch bug (Hemiptera: Lygaeidae) and to St. Augustine decline strain of panicum mosaic virus. Journal of Economic Entomology 82(6): 1729-1732

Antibiosis to Texas populations of southern chinch bug, Blissus insularis Barber, was tested in 38 selected cultivars and experimental lines of St. Augustinegrass, Stenotaphrum secundatum (Walt.) Kuntze. High levels of resistance were measured in the experimental lines PI-410357, New Zealand-2, Mutant-5, TXSA-8202 (=Mutant-6), TXSA-8218 (=Mutant-8), and the cultivar 'Floralawn.' Although some B. insularis in Florida reportedly have overcome resistance by 'Floratam', we encountered no evidence of such a phenomenon. FA-243 was susceptible and FA-82 was slower acting than 'Floratam'. Both lines have been reported to be highly resistant to Florida B. insularis. Experimental lines DALSA-8208, DALSA-8216, and DALSA-8401 demonstrated moderate levels of antibiosis. The cultivars 'Raleigh' and 'Seville' and several experimental lines were susceptible. Bioassays of the grasses for resistance to the St. Augustine decline strain of Panicum mosaic virus (PMV-SAD) indicated that all were resistant to the virus except FA-82, 'Texas Common', TXSA-8262, DALSA-8203, DALSA-8207, DALSA-8209, DALSA-8210, DALSA-8212, DALSA-8217, DALSA-8403, and WT-1.


DOI: 10.1093/jee/82.6.1729

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