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ARS Home » Southeast Area » Fort Pierce, Florida » U.S. Horticultural Research Laboratory » Subtropical Plant Pathology Research » Research » Publications at this Location » Publication #350677

Research Project: Mitigating High Consequence Domestic, Exotic, and Emerging Diseases of Fruits, Vegetables, and Ornamentals

Location: Subtropical Plant Pathology Research

Title: Emergence of a resistance breaking TSWV strain in tomato in California

Author
item Batuman, Ozgur - University Of Florida
item Rojas, Maria - University Of California, Davis
item Macedo, Monica - University Of California, Davis
item Adkins, Scott
item Gilbertson, Robert - University Of California, Davis

Submitted to: International Congress of Plant Pathology Abstracts and Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 12/8/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary: Tomato spotted wilt virus (TSWV) is a highly destructive pathogen of tomato in the central valley of California. During the 2016 tomato growing season, unusually early and severe symptoms of TSWV occurred in fields of TSWV-resistant fresh market tomato cultivars. Disease incidences of 50-80% were observed in some fields. Experimental analyses revealed that these infections were caused by a newly emerging resistance-breaking TSWV strain.

Technical Abstract: Tomato spotted wilt virus (TSWV) is a highly destructive pathogen of tomato in the central valley of California. During the 2016 tomato growing season, unusually early and severe symptoms of TSWV occurred in fields of TSWV-resistant fresh market tomato cultivars. Disease incidences of 50-80% were observed in some fields. Experimental analyses revealed that these infections were caused by a newly emerging resistance-breaking TSWV strain. Specific amino acids were identified that resulted in the resistance-breaking phenotype. The current integrated pest management program for TSWV in California is being revised to address the resistance-breaking strain of TSWV.