Border-hopping virus identified in Chilean pepper and tomato crops

An international research team, led by scientists from Washington State University and the Pontifical Catholic University of Chile, has identified a previously unknown viral disease affecting pepper and tomato crops in northern Chile. The virus, known as pepper necrotic spot virus, is spread by insects and is part of a group of plant pathogens called tospoviruses, which cause significant economic losses in crops worldwide.

The researchers discovered symptoms of the virus in tomatoes and peppers with rings of dying tissue, bronze discoloration, and other deformations in markets in Santiago, Chile. Further investigation revealed that the virus was spreading southward from Arica, a key supplier of winter tomatoes and peppers, to other regions. The virus was confirmed to be transmitted by thrips, tiny flying insects capable of spreading the disease over long distances.

Early detection, management of thrips populations, and development of virus-resistant crop varieties are crucial in controlling the spread of the disease. This collaborative effort between scientists from the U.S. and Chile underscores the importance of international partnerships in addressing plant health challenges.