Beet Curly Top Virus

Causal Agent

Curtovirus transmitted by beet leafhopper causes beet curly top virus (BCTV).

Symptoms

Plants are stunted and leaves are yellow. Later, leaves become thick and brittle and may turn dark green. Few if any pods develop, and plants drop flowers and senesce early.

Disease Cycle

In spring and summer, beet leafhoppers migrate from their overwintering sites into vegetable fields. They can acquire the virus during feeding on weeds and then spread it to susceptible vegetables, including beans. The leafhopper will carry and transmit the virus its entire life. 

Management

Once a plant is infected, there is no cure. Good weed control to remove virus reservoirs in the vicinity of fields can help. There are currently no resistant bean varieties available.