Canadian Journal of Plant Science · 1974 · 38 citations · 0 references
AgricultureCrop SciencesPlant SciencesBreeding For Disease ResistanceCrop ProtectionPlant Disease DiagnosisDisease DynamicsDisease ResistanceEpidemiology Of Plant DiseasesHost Plant ResistancePlant Disease ResistanceResistant Crop VarietiesBarley Disease ResistanceBarley PhenotypingLeaf Spot SymptomsPathogen Virulence Testing
Isolates of Pyrenophora teres (Died.) Drechsl. causing either net- or spot-type symptoms on barley (Hordeum vulgare L.) were collected in 1973 from fields near Winnipeg, Manitoba. Spot-type symptoms were similar to those of spot blotch incited by Cochliobolus sativus (Ito and Kurib.) Drechsl. ex Dastur. The cultivars Herta and Fergus, previously reported to be moderately resistant, were susceptible to both types of isolates. These two cultivars presently account for virtually all of the two-rowed barley and about half of the total barley acreage in Manitoba. The resistant hybrid lines CI 5791 and BT 201 retained their resistance to the isolates which produced net-type symptoms but were less resistant to those producing the spot type.