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Resistance

New Hosts of St. Augustine Decline Virus. Norani Abu- Samah, Former Graduate Student, Department of Plant Pathology, Agricultural Experiment Station, Louisiana State University, Baton Rouge 70803, Present address of the senior author: Kuala Lumpur, Malaysia; G. E. Holcomb, Associate Professor, Department of Plant Pathology, Agricultural Experiment Station, Louisiana State University, Baton Rouge 70803. Phytopathology 66:215-216. DOI: 10.1094/Phyto-66-215.

Twenty-one Panicum species, plant introductions, and cultivars were tested for their reaction to St. Augustine decline virus. Eight produced systemic mosaics, seven were symptomless carriers, and five were immune. Chlorotic local lesions were observed on inoculated leaves of P. dichtomiflorum. The number of lesions was found to decrease with increasing inoculum dilutions. Leptochloa filiformis produced a systemic mosaic when inoculated with St. Augustine decline virus.