Submitted to: Soybean Rust Workshop
Publication Type: Abstract Only
Publication Acceptance Date: May 12, 1996
Publication Date: N/A
Technical Abstract: Soybean rust, caused by Phakopsora pachyrhizi, is a major disease limiting soybean production primarily in the tropics and subtropics of Asia. The Asian Vegetable Research and Development Center (AVRDC) has been instrumental in its commitment to conduct research on soybean rust. The majority of information generated through AVRDC scientists has been on aspects of epidemiology and evaluation of host response to rust. Specific contributions include a better understanding of how the environment influences the host-pathogen interaction, methods of control, the evaluation of resistance, and disease forecasting and modeling. Physiological development of soybean plants, especially during reproductive growth stages, was shown to directly affect the development of rust. Tolerance to rust was characterized and breeding efforts and selection for tolerance have been used to develop high-yielding rust-tolerant soybean lines. The quantitative relationship of rust on soybean tolerant and partially resistant lines to yield was documented. Sources of race-specific resistance and additional sources of resistance in accessions of Glycine species were identified. Although years of research on rust have been concluded, there are still many unanswered questions which need to be addressed. Although more is known about soybean rust now than 20 years ago, there are still a number of basic and applied research questions to answer.