Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Bacterial leaf streak or black chaff of cereals.

Abstract

The literature on bacterial leaf streak of cereals, caused by various pathovars of Xanthomonas campestris, is reviewed. The current geographical distribution of the disease, possible confusions in symptoms, and the limited quantitative information available on losses and on host/pathogen interactions are discussed. Disease aetiology and means of control are also reviewed. The objective is to define the present situation of black chaff in wheat, barley and triticale, and to delineate the major research needs in these crops. Difficulties in controlling bacterial leaf streak arise as a result of limited epidemiological knowledge and of the absence of satisfactory seed treatment permitting the eradication of the bacterium. The need for a seed certification scheme and for more information on genetic resistance is emphasized.