Unraveling the Vector Transmission Biology of the Ipomovirus Sweet Potato Mild Mottle Virus (Potyviridae) in Sweetpotato (Lam.)

This study undertakes to unravel vector transmission biology of Sweet potato mild mottle virus (SPMMV), a type member of the genus Ipomovirus in the family Potyviridae. This study will be conducted in four selected districts of Uganda for two sweetpotato growing seasons of 2012 and 2013. The districts include Masaka and Mpigi (around Lake Victoria basin in Central region); and Mbale and Soroti (Eastern region). Sweetpotato is the second most important root crop in East Africa, but production there is greatly constrained by viruses including SPMMV, a critical component of the devastating sweet potato virus disease (SPVD) complex. While the vectors disseminating other common viruses of sweetpotato in East Africa are well known, the vector transmitting SPMMV has remained cryptic. Consequently, the epidemiological relationship between incidence of SPMMV and its potential vectors in the fields is unknown. The vector transmitting SPMMV in sweetpotato and the SPMMV-vector epidemiological relations under field conditions will be determined. Farmer awareness of SPVD complex effects of sweetpotato yield will be enhanced through field activities involving farmers.
Cette étude vise à dénouer la biologie de la transmission des vecteurs du virus de tache légère de la patate douce (SPMMV), un membre type du genre Ipomovirus dans la famille Potyviridae. Cette étude sera menée dans quatre districts sélectionnés de l’Ouganda pour deux saisons de croissance de la patate douce de 2012 et 2013. Les districts comprennent Masaka et Mpigi (aux environs du bassin du lac Victoria dansla région centrale) ainsi que Mbale et Soroti (dans la région de l’Est). La patate douce est la deuxième plus importante culture des racines comestibles en Afrique Orientale, mais la production est fortement contrainte par des virus, y compris SPMMV, un constituant essentiel du complexe des maladies dévastatrices causées par le virus de la patate douce (SPVD). Alors que les vecteurs de diffusion d’autres virus communs de la patate douce en Afrique de l’Est sont bien connus, le vecteur de transmission de SPMMV est resté énigmatique. Par conséquent, la relation épidémiologique entre l’incidence de SPMMV et ses vecteurs potentiels sur terrain est inconnue. Le vecteur de transmission de SPMMV dans la patate douce et les relations épidémiologiques SPMMV-vecteur sur le terrain seront déterminés. La sensibilisation des agriculteurs sur les effets complexes de SPVD sur le rendement de la patate douce sera augmentée.
Extended abstracts submitted under Integrated Crop Management
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East Africa
RUFORUM Conferences and Workshops
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The 2012 RUFORUM Biennial Conference is the third in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholers in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under Integrated Crop Management