A field survey to determine the incidence of Impatiens necrotic spot virus (INSV) in Georgia peanut (Arachis hypogaea L.) was conducted during the 1999 and 2000 growing seasons. Confirmation of INSV infection was made by enzyme-linked immunosorbent assay (ELISA). During August 1999, a total of 504 symptomatic peanut plants were sampled from 42 fields representing 15 counties. Peanut plants showing symptoms of spotted wilt from 14, 15, and 15 counties were sampled during the early (June), mid (July), and late (August/September) periods of the 2000 growing season, respectively. During 2000, a total of 1433 peanut plants were sampled over the course of the survey. The 1999 survey yielded no INSV-positive peanut plants, while 87% of the plants sampled tested positive for TSWV. During the 2000 survey, INSV was detected from 2.0% of all peanut plants sampled, while TSWV was detected in 97.8% of all plants. All plants that tested positive for INSV also tested positive for TSWV. TSWV was detected from plants in each field. INSV was only detected from seven fields in four counties. Additionally, 90 peanut plants were tested for INSV in a Coffee County field in which that virus was detected in July 2000. TSWV was detected in 94% of those plants, while INSV was detected in 20% of the plants. Double infections were detected in 17% of the plants from the field in Coffee County. The natural incidence of another Tospovirus in peanut could have important management implications for peanut production systems.
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Keywords: Arachis hypogaea, Bunyaviridae, INSV, thrips, tospovirus, TSWV
How to Cite:
Wells, M. & Pappu, H. & Culbreath, A. & Todd, J. & Brown, S., (2001) “Field Survey of Impatiens Necrotic Spot Virus in Georgia Peanut”, Peanut Science 28(1), p.34-37. doi: https://doi.org/10.3146/i0095-3679-28-1-9