Abstract

Abstract Cane supplies over 60% of the world's commercial sugar. Technologically the industry is highly organised but diseases are a recurrent problem. Ratoon stunting disease is especially serious. Leaf scald (Xanthomonas albilineans) and smut (Ustilago scitaminea) are also important at the moment because of their potential for damage and their ability to cross quarantine boundaries. Red stripe (Pseudomonas rubrilineans), deterioration of harvested cane, eye spot (Drechslera sacchari), pineapple disease (Ceratocystis paradoxa), red rot Glomerella tumucanensis, yellow spot (Cercospora koepkei). Fiji (virus) and mosaic (virus), are other diseases which can also cause economic losses. The effective control of disease needs legislative backing, effective field work in surveying for disease, obtaining clean plants etc., plus suitably resistant varieties. A typical, large, clean-plant scheme is at present in operation in southern Queensland against Fiji disease.

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