Studies on northern corn leaf blight Exserohilum turcicum in Mauritius
| MSI99P0051 | |
| Mawlah, N. | |
| University of Mauritius, Réduit, MU | |
| Studies on northern corn leaf blight Exserohilum turcicum in Mauritius | |
| Thesis, BSc, Crop Science and Production | |
| Thesis | |
| 1990 | |
| 109 p.: 12 figs, 4 tbls, 6 pl, 2 appen | |
| En | |
| En | |
| Studies carried out from November 1988 to November 1989 have shown that Exserohilum turcicum, the causal agent of NCLB is favoured by the moist and cool climate prevailing mostly in the superhumid zone of Mauritius. The disease was found to reduce yield significantly in three susceptible hybrids, UR 14, Pioneer 432 and ZS 5206. Out of five fungicides evaluated, propiconazole was found to be the most effective against the disease and weekly treatments increased yield by 65 per cent over the unsprayed control. Although weekly applications were found to control the disease satisfactorily and increase yield significantly, such approach cannot be used on a practical scale as it would render cost of production too high. Evaluation of Iprodione at various spray intervals showed that two treatments applied in the middle and late stage in the crop cycle could increase yield by 34 per cent over the untreated plots. In vivo and in vitro studies failed to show that the fungus was seed borne. No alternative host was found among 34 species surveyed in the field and examined in the laboratory leading to the conclusion that maize itself carries the disease from one season to another. Owing to the conditions prevailing in the wet uplands of the island which year in year out are favourable to the disease, resort to resistant genotypes rather than fungicide treatments is recommended. | |
| MAIZE PLANT VIRUSES DISEASES NORTHERN CORN LEAF BLIGHT EXSEROHILUM TURCICUM UR 14 PIONEER 432 ZS 5206 | |
| MAURITIUS | |
| Maize: Diseases and disease management | |
| Viruses: Leaf blight | |
| 1991-11-19 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| PATH |