Factors that promote the expression of orange rust on sugarcane varieties with moderate resistance

• Grant number: 11/19673-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2012
• End date: April 30, 2013
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Alfredo Seiiti Urashima
• Grantee: Juliana Bombecini
• Host Institution: Centro de Ciências Agrárias (CCA). Universidade Federal de São Carlos (UFSCAR). Araras , SP, Brazil
• Associated scholarship(s): 12/07157-0 - International training on rust of sugarcane, BE.EP.IC

Abstract

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 threaten 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 the 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 on the effect of pathogen concentration and nitrogen fertilization.(AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

URASHIMA, ALFREDO S.; BOMBECINI, JULIANA; UZAN, JULIANA; GAZAFFI, RODRIGO. Effect of pathogen concentrations and period of leaf wetness on orange rust severity in Brazilian sugarcane cultivars. ROPICAL PLANT PATHOLOG, v. 43, n. 6, p. 8-pg., 2018-12-01. (11/19673-0, 12/07157-0)

URASHIMA, ALFREDO S.; BOMBECINI, JULIANA; UZAN, JULIANA; GAZAFFI, RODRIGO. Effect of pathogen concentrations and period of leaf wetness on orange rust severity in Brazilian sugarcane cultivars. TROPICAL PLANT PATHOLOGY, v. 43, n. 6, p. 506-513, DEC 2018. (11/19673-0, 12/07157-0)