Ramularia Leaf Spot - Beet

Ramularia beticola

Severe infestations of Ramularia leaf spot (Ramularia beticola) can cause significant defoliation in beet crops. It is first seen as light brown angular spots with dark-brown to reddish margins. Infected leaves turn yellow and die.

Main Host

Fodder beet.

Symptoms

First seen as light brown angular spots (4-7 mm in diameter) on older leaves. When mature, these spots have a dark brown-reddish margin with silvery-white centres. Under magnification, white sporulation can be seen. Infected leaves turn yellow, become necrotic and die.

Life Cycle

Survives on infected crop residue. Spores are spread by wind and splash dispersal. Infections occur at high humidity and mild temperatures (17-20ºC).

Weather Conditions

Favoured by wet, humid and mild weather conditions.

Economic Impact

Ramularia can cause significant defoliation if persistent favourable climatic conditions occur.

Control

Escolta has a label claim for the control of Ramularia.

Early Ramularia infection

Ramularia infection