KWS

Beet rust

Causal agent: Uromyces betae
Symptoms: Small yellowish-orange to reddish-brown pustules on upper and lower surface of the leaf, about 1 mm large. If there are a large number of pustules, the leaves wither, become dry and finally die.
Epidemiology: When there is sufficient humidity, the fungus forms spores at all development stages of beet. The pathogen is susceptible to higher temperatures beyond 20 C.
Risks: High N-fertiliser application
Economic importance: Generally, the disease has no economic impact. It occurs particularly in areas with higher relative humidity (coastal regions).
Control: Often control measures are not economic, however when harvest is later such as in the UK, useful yield increases can be obtained by controlling the disease with fungicides such as Punch C (carbendazime and flusilazole).

KWS