Whitefly-transmitted begomoviruses and advances in the control of their vectors
Surapathrudu Kanakala and Murad Ghanim
from: Genes, Genetics and Transgenics for Virus Resistance in Plants (Edited by: Basavaprabhu L. Patil). Caister Academic Press, U.K. (2018) Pages: 201-220.
Whitefly-transmitted begomoviruses infect a large number of dicotyledonous hosts, causing many diseases of economic importance. Members of the genus Begomovirus are transmitted by only one whitefly species, Bemisia tabaci; and the symptoms include severe leaf curling, yellow mosaic, and yellow vein mosaic in several important agricultural crops. The insect vector B. tabaci plays a major role in the spread of many members of this virus group, and as a consequence, it also contributes to the emergence of new strains and species. Since the last decade, 360 begomovirus species and 41 morphologically indistinguishable B. tabaci species that were characterized across the globe have dramatically increased. Together, both the complex members of B. tabaci species and begomovirus species are spreading around the world; however, little information exists about the geographical distribution of this group of viruses, the relationships between its species, and the dependence for transmission on the only whitefly vector. The ability of multiple virus transmissions, the analysis of the B. tabaci species, and the identification of insect proteins implicated in virus replication and transmission will open up novel avenues for the management of this group of important diseases. This chapter provides an overview of the global diversity and geographical distribution of the B. tabaci species complex and their association with begomoviruses and recent advances in their control read more ...