Studies on chlorotic streak disease of sugar cane
| MSI99P0990 | |
| Antoine, R. | |
| Studies on chlorotic streak disease of sugar cane | |
| Periodical article | |
| 1960 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 10, 1091-1097 | |
| En | |
| Chlorotic streak is a disease associated with high soil moisture content. Widespread in the super-humid uplands, chlorotic streak is not encountered in the dry coastal areas of Mauritius except on heavy soils with poor drainage. Stools derived from heat-treated cuttings, under environmental conditions favourable to the disease, will exhibit leaf symptoms after some time. Trials were laid down in a wet and a dry locality with infected and heat-treated planting material, together with cuttings obtained from symptomless cane growing in an apparently disease-free zone. Cuttings originating from a dry locality gave rise to stools which reacted in the same was as those derived from heat-treated cuttings in both trials. There was a gradual disappearance of symptoms in stools derived from infected cuttings planted in a dry locality. An assessment of the rate of natural infection showed that cuttings taken from stools which had lost leaf symptoms, when planted with diseased and heat-treated cuttings in an infected locality, reacted in the same was as the latter. It appears logical to assume that symptomless canes in a dry area are free from the disease organism, and that loss of symptoms from the plant in the subhumid area means an actual disappearance of the disease from the stalks. An experiment, established in a diseased locality in order to determine whether natural infection by chlorotic streak takes place in the soil, is described. Heat-treatedand infected cuttings were planted in drums in sterilized and unsterilized soils from an apparently disease-free and a diseased locality. The following year some of the diseased stools, growing in a sterilized soil gave rise in some cases to diseased plants when watered with soil leach coming from diseased soil supporting infected stools. Heat-treated cuttings planted in unsterilized soil from a diseased area gave rise to several plants showing leaf symptoms. Plants derived from heat-treated cuttings growing in sterilized soil did not show the disease. Waterlogging influences the expression of disease symptoms. The results seem to indicate that air-borne transmission is unlikely, and that the disease is apparently transmitted in the soil. | |
| SUGARCANE DISEASES HEAT TREATMENT CONTROL CHLOROTIC STREAK | |
| MAURITIUS | |
| Sugarcane: Diseases and disease management | |
| 1992-05-26 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| PATH |