Genus: Curtovirus; Family: Geminiviridae
Beet curly top, Beet mild curly top, Beet severe curly top, Spinach curly top, Pepper yellow dwarf, and Pepper curly top virus
Figure 1 – Yellowing (chlorosis) of leaves is the initialsymptom of Curtovirus infection in common bean.
Figure 2 – Yellowing, leaf curling, leathery leaves; severe Curtovirus symptoms in common bean.
Figure 3 – Yellowing (chlorosis) of leaves in Curtovirus-infected cowpea (Vigna unguiculata).
- Leafhopper vector presence (Circulifer tenellus)
- Virus is transmitted in a persistent manner; is retained when the vector molts; does not replicate in the vector; is not transmitted to the offspring of the vector; is not sap transmissible or by contact with infected plant parts.
- Infected weed reservoirs (hosts) from previous season.
- Other infected cultivated hosts in the vicinity during vector dispersal (>300 hosts are recorded in ~44 families).
- Warm temperatures greater than 30°C [86°F]
Courtesy of Jason French and Natalie Goldberg, New Mexico State University