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- Title
Inoculum Sources for the Spread of Leaf Scald Disease of Sugarcane Caused by <em>Xanthomonas albilineans</em> in Guadeloupe.
- Authors
Klett, P.; Rott, P.
- Abstract
Leaf scald of sugarcane, caused by <em>Xanthomonas albilineans</em>, is thought to be spread mainly in infected cuttings and transmitted on infested cutting implements. Several observations made in Gua- deloupe indicated that other means of spreading also occurs The dispersal of the pathogen outside sugarcane was investigated with plants inoculated by an antibiotic-resistant marked strain of <em>X. albilineans</em> and with plants naturally infested with wild strains of the pathogen. The bacteria were isolated in water droplets (rain or dew) on the surface of sugarcane leaves at dawns It was also detected on the surface of dry leaves during the day by leaf imprinting onto a selective culture medium. The bacteria were much more frequently isolated from the surface of symptomatic leaves than from symptomless ones. Aerial dispersal of <em>X. albilineans</em> was investigated by placing Petri dishes containing selective culture medium between sugarcane plants but without direct contact with the leaves. The pathogen was isolated in four out of 270 dishes which were randomly set 3-14 h in a diseased field. These results indicated that the pathogen exuded from the leaves and then was spread by aerial means (rain, insects, ...) or by leaf contact. The bacteria were also found in roots and rhizospheric soil of infested sugarcane stools suggesting that <em>X. albilineans</em> cans could be transmitted by root to root contact or by the soil. Finally, isolations of the pathogen in sugarcane inflorescences were positive. So, fuzz transmission may also occur.
- Subjects
SUGARCANE leaf scald; FUNGAL diseases of plants; XANTHOMONAS albilineans; XANTHOMONAS; SUGARCANE diseases &; pests; FECAL incontinence
- Publication
Journal of Phytopathology, 1994, Vol 142, Issue 3/4, p283
- ISSN
0931-1785
- Publication type
Article
- DOI
10.1111/j.1439-0434.1994.tb04541.x