Infections in spring cause a reduction in the number of grains/ears and the grain weight. In case of severe infection, the grain does not have a growth stage.
Root rot [Pseudocercosporella herpotrichoides]
Root rot - image 1
Prefers cool humid conditions. Infections start from spores released form infected plant material from previous crops.
Pattern of damage
Towards the end of fall, longitudinal, gray-brown to yellow-brown spots appear on the base of the stem. Then, during the stem elongation phase, the typical oval, frequently dark-outlined spots (eye-spots) form on the stem (Picture 1). The base of the stem rots and in case of severe, early infection, the stems can bend over at the affected zone (lodging).