Pepper necrotic spot virus identified in Chilean crops

An international scientific collaboration between Washington State University and the Pontifical Catholic University of Chile has confirmed the presence of pepper necrotic spot virus in Chile. The virus, which is spread by insects, was previously identified in Peru but had not been documented in Chile.

Virologist Marlene Rosales first identified the pathogen after observing tomatoes and peppers with bronze discoloration, tissue death rings, and other deformities at markets in Santiago. Subsequent investigations focused on the Arica province near the Peruvian border, specifically in the Azapa and Lluta valleys, which serve as critical agricultural suppliers for Chile during the winter months.

The pepper necrotic spot virus belongs to the tospovirus group, a category of insect-borne pathogens capable of infecting over 1,000 plant species. These viruses cause billions of dollars in annual damage to various crops, including soybeans, peanuts, beans, and tomatoes, as well as numerous ornamental plants.