Ageratum conyzoides: A host to a unique begomovirus disease complex in Cameroon

► Sequence diversity of begomoviruses and DNA satellites in weed from Cameroon. ► Leaf curl common in the weed Ageratum conyzoides. ► New species of begomovirus, betasatellite and alphasatellite found. ► Distinct from begomoviruses and satellites from Asia.