Abstract
Brevipalpus-transmitted viruses (BTV) are known since early XXth century, but detailed knowledge about them only became available in the last 15 years. Great efforts were made especially on the most economically important among BTV, the Citrus leprosis virus C (CiLV-C) which resulted in the understanding of its molecular nature, relationship with the host plants and the vector and its epidemiology. Consequently, a rapid and precise method for virus detection and more efficient and economical management of these viruses were developed. One important finding about BTV was that there are at least two distinct types of BTV: the cytoplasmic (BTV-C) and nuclear type (BTV-N) and that these viruses cause consistently only localized infection, without becoming systemic in the infected plant. It became also clear the existence of numerous plant species, naturally infected by BTV. However, these advances brought up new challenges, as to understand the level of diversity of these BTV-C and BTV-N, and also to understand the taxonomy and diversity of Brevipalpus populations, the mechanisms of virus transmission, management of the mite by biological control, etc. This project intends to solve some of these questions, through an integrated action, with the participation of a group of researchers of different specialities, from several institutions, expecting to give an additional and significative advance on the knowledge of this important and peculiar group of plant viruses. (AU)
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