Sugar, ethanol and bioenergy are the main products of sugarcane and they will continue to be valuable commodities worldwide for years to come. Brazil has a leading role in sugarcane production and in order to keep this favorable condition, specialists involved with this crop need to be aware of every aspect that may threat high yielding. The orange rust, caused by the fungus Puccinia kuehnii, has been the newest and one of the most dangerous problems faced by sugarcane due to yield loss it caused in susceptible varieties in other countries. Soon after report of the occurrence of orange rust in Brazil was released susceptible varieties were readily identified and recommendation to interrupt their multiplication in the field was given to growers. Nevertheless, the same can not be applied to varieties with moderate resistance because they will only show severe disease symptoms under specific conditions. Therefore, they still will be grown extensively. The present work aims to examine the conditions for varieties of moderate resistance to show severe symptoms of orange rust focusing the effect of pathogen concentration and nitrogen fertilization.
News published in Agência FAPESP Newsletter about the scholarship: