Occurrence of Sharp Eyespot in Spring Cereals Grown in Some Regions of Poland

Abstract

Occurrence of Sharp Eyespot in Spring Cereals Grown in Some Regions of PolandOccurrence of sharp eyespot was determined in the period 2006-2008, on commercial fields of spring cereals, localized in northern and central Poland. Percent of infected stems, and the disease index were evaluated. Occurrence of sharp eyespot on spring cereals, especially on oat, was low. Slight infection was mostly observed. In some farm fields, disease symptoms were not observed. A significant difference in the occurrence of sharp eyespot on barley in respective years was noted. On commercial farms, the effect of previous crop and fungicidal treatment on occurrence of sharp eyespot was not observed. Significant variation of the infection was noted only for barley. Presence ofRhizoctonia cerealisandR. solaniin the damaged tissues was confirmed by mycological analysis as well as PCR assay.