Detection and Characterization of Peru Tomato Virus Strains Infecting Pepper and Tomato in Peru

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Abstract
Virus isolates from pepper (C. baccatum var. pendulum) and tomato (L. esculentum) in coastal areas of Peru were identified as Peru tomato virus (PTV). Except for 4 Chenopodium spp. which developed local lesions, their host range was confined to the Solanaceae. PTV was not seed transmitted in tomato or pepper. The infectivity of crude sap withstood in vitro aging 10-21 days, had a thermal inactivation point of 55-60.degree. C, and a dilution end point between 10-5 and 10-6. Highly purified preparations of the most severe strain (isolate M4 from pepper) used as antigen produced antiserum with a titer of 1:16,384. A distant serological relationship was detected between PTV and potato virus Y, tobacco etch and pepper mottle viruses, but not between PTV and pepper veinal mottle or pepper severe mosaic viruses. Normal length of particles of the 4 strains of PTV was 741-746 nm. PTV was confirmed as a new potyvirus based on host range and serological properties.

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