International Fungicide Efficacy Trials for the Management of Soybean Rust

• DOI: 10.1094/pdis-91-11-1450
• Publication Date: 2007-10-09T20:39:27Z
• Authors: M. R. Miles; C. Levy; W. Morel; T. Mueller; T. Steinlage; N. van Rij; R. D. Frederick; G. L. Hartman
• Keywords: Strobilurin; Tebuconazole; Rust (programming language); Soybean rust

The efficacy of fungicides in managing soybean rust was evaluated 12 environments South America and southern Africa over three growing seasons from 2002 to 2005. There were differences final severity, defoliation, yield among the treatments at most locations. In locations where not severe, all reduced severity. applications triazole + strobilurin resulted lower severity higher yields compared with other fungicides. provided highest many locations; however, tended be than that also between trials two several fungicides, resulting less severe yields. However, third application tebuconazole, tetraconazole, mixtures containing azoxystrobin pyraclostrobin needed maintain yield. These effective for maintaining