Identification of components of the bacterial blight complex of bean in Mauritius, their relative importance and measures adopted for their control
| MSI99P0093 | |
| Autrey, L. J. C. Saumtally, S. | |
| Identification of components of the bacterial blight complex of bean in Mauritius, their relative importance and measures adopted for their control | |
| Smithson, J. B. (ed.), Proceedings of the 2nd Workshop on Bean Research in Eastern Africa, Nairobi, Kenya, 5-8 March 1990 | |
| Book chapter | |
| 1990 | |
| CIAT African Workshop Series, 7 | |
| p. 236-250 | |
| Debre Zeit, Ethiopia, CIAT Regional Programme on Beans in Eastern Africa | |
| En | |
| En | |
| Two bacterial organisms causing fuscous blight (Xanthomonas campestris pv. phaseoli var. fuscans) and bacterial brown spot (Pseudomonas syringae pv. syringae) have been recently identified in addition to halo blight (X. campestris pv. phaseoli), which were known to occur previously. Identification was based on symptoms, biochemical and physiological tests, serological methods and phage typing. Common blight was most frequently encountered while brown spot was of rare occurrence. Climatic conditions were found to influence disease incidence with common blight being favoured in hot dry areas and halo blight in cool wet localities. Seed transmission of the four organisms epidemics especially common and halo blights. Wounds by the leaf miner Liriomyza trifolii were found to increase disease spread especially of common blight. Foliar sprays of copper oxychloride and streptomycin seed treatment reduced the incidence of halo blight but not of common blight. Out of the 56 entries evaluated in the field by the exposure method for their resistance to common blight, 17 were resistant, 19 moderately resistant, 8 slightly susceptible, 7 susceptible and 5 highly susceptible. Evaluation of 21 entries for resistance to fuscous blight by direct inoculation revealed that 1 was moderately resistant, 3 slightly susceptible, 10 susceptible and 7 highly susceptible. Navy bean was in general more resistant to bacterial blight than red kidney bean. Common blight was found to be the most important component of the bacterial blight complex and the need for resistant cultivars and disease free seed is emphasized. | |
| BEANS (PHASEOLUS) BACTERIAL DISEASES XANTHOMONAS CAMPESTRIS PSEUDOMONAS SYRINGAE DISEASES | |
| MAURITIUS | |
| Beans: Diseases | |
| Bacterial diseases: Bacterial blight complex | |
| 1992-01-07 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| PATH | |
| CAT | |
| 1 | |
| PATH |