ASSESSMENT OF BARLEY YIELD LOSSES DUE TO POWDERY MILDEW IN SOME IMPROVED BARLEY CULTIVARS

RIZK, RIZK A.; EL-SHERBINI, ABDEL- RAHMAN M.; MOSTAFA, ELSAYED E.

doi:10.21608/ejar.1998.362986

ASSESSMENT OF BARLEY YIELD LOSSES DUE TO POWDERY MILDEW IN SOME IMPROVED BARLEY CULTIVARS

Document Type : Original Article

Authors

¹ Plant Pathology Research Institute, Institute, Agricultural Research Centre, Dokki, Giza, Egypt

² Barley Research Department, Field Crops Research Institute, Institute, Agricultural Research Centre, Giza, Egypt

10.21608/ejar.1998.362986

Abstract

Yield losses due to powdery mildew infection for the barley cultivars Giza 123, Giza 124, Giza 125, and Giza 126 were determined during two consecutive seasons, 1994/95 and 1995/96 at Giza and Gemmeiza, respectively. The single tiller technique was used. Yield components, 1 000-kernel weight (1000-KWT) and weight of grains per head were determined. The results indicated that gradual reduction in 1000 KWT and weight of grains per headregularly correlated with the increase in mildew severity to 40%. A relatively slight reduction in 1000-KWT due to mildew infection was noticed in Giza 123 compared with the other cultivars. Grain yield losses was also observed and was amounted to about 18%.