Seed transmitted bacterial diseases of cereals: epidemiology and control
1986
Sands, O.C. (Montana State Univ. (USA). Dept. of Plant Pathology) | Mizrak, G. | Hall, V.N. | Kim, H.K. | Bockelman, H.E. | Golden, M.J.
Two bacterial diseases of cereal grains in the Middle East are bacterial leaf streak, also known as flack chaff, caused by Xanthomonas campestris pv. translucens and bacterial leaf blight caused by Pseudomonas syringae. The former is a seed transmitted pathogen, virulent on almost all cultivars of wheat, barley, and triticale. Control is best implemented by use of clean seed (hot water treatment at 53 deg C for 10 minutes, immediately cooled and dried) and subsequent isolation of breeder and foundation seed fields. The genetics of resistance in barley is only partially defined, but promising resistant material is from Ethiopian soures. The second disease is only a problem if there are prolonged periods of moisture with near freezing temperatures. Seed treatment is not useful. Semi-selective media for both pathogens ar0847e described. Both bacteria are ice nucleation active and this phenomenon will be discussed in terms of their epidemiology and dispe
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