Bacterioses threatening cereal crops in Bulgaria

At the end of last year, Sinor.BG presented a number of fungal diseases (mycoses) that can cause serious damage to cereal crops. No less dangerous are diseases caused by bacteria, the so-called bacterioses. They can be found in both autumn and spring crops. Basal bacteriosis in wheat and barley is caused by the species Pseudomonas syringae pv atrofaciens (Pseudomonas atrofaciens). The bacterium is rod-shaped with whips that are located on one side. When isolated on agar media, it forms white colonies. The infection is preserved and transmitted by seeds from infected crops, and the infected seed itself has low germination. A guiding sign is the separation of the whitish exudate (bacterial pus) from some germinated seeds. Coleoptile rot is another sign that appears after germination. The affected area has a reddish-brown tinge. Surviving plants are stunted. Characteristic whitish watery spots appear on their leaves. They are yellowish and gradually grow. A characteristic feature are ...