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Disease Note. Tomato Spotted Wilt Virus (TSWV) and Strains of Peanut Mottle Virus that Mimic TSWV Symptoms in Peanut in Georgia. P. Sreenivasulu, Department of Plant Pathology, University of Georgia, Griffin 30223. J. W. Demski, D. V. R. Reddy, S. M. Misari, P. E. Olorunju and C. W. Kuhn. Department of Plant Pathology, University of Georgia, Griffin 30223; ICRISAT, Pantancheru, India; Ahmadu Bello University, Zaria, Nigeria; and Department of Plant Pathology, University of Georgia, Athens. Plant Dis. 72:546. Accepted for publication 17 February 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0546F.
Tomato spotted wilt virus (TSWV) was detected for the first time in
Georgia peanuts (Arachis hypogaea L.) by enzyme-linked
immunosorbent assay in 1986 (Demski,unpublished) prompting a
systematic survey in 1987. TSWV was detected in 10 of 13 peanut fields
distributed over nine southwestern Georgia counties, whereas no
TSWV-infected plants were detected in the same or adjacent counties in
1983 (1). The incidence of TSWV-infected plants was 0.1% or less in
virus-infected fields. Three strains of peanut mottle virus (PM V), i.e.,
PM V-mild (M), PM V-necrosis (N), and PM V-chlorosis (C), were also
identified in these same fields. Incidence of the endemic PM V -M varied
from 1 to 80%, whereas incidences ofPMV-N and PMV-C were similar
to that of TSWV. Symptoms caused by PMV-N and PMV-C were
sometimes similar to those caused by TSWV, particularly at the early
stages of disease development, and mixed infections of TSWV and
PMV were detected. Thus, identification of TSWV must be based on
reliable laboratory tests. |