Yield losses in grain sorghum due to rust infection

Article


White, Jodie A., Ryley, Malcolm J., George, Doug L., Kong, Gary A. and White, Simon C.. 2012. "Yield losses in grain sorghum due to rust infection ." Australasian Plant Pathology. 41 (1), pp. 85-91. https://doi.org/10.1007/s13313-011-0093-3
Article Title

Yield losses in grain sorghum due to rust infection

ERA Journal ID2559
Article CategoryArticle
AuthorsWhite, Jodie A. (Author), Ryley, Malcolm J. (Author), George, Doug L. (Author), Kong, Gary A. (Author) and White, Simon C. (Author)
Journal TitleAustralasian Plant Pathology
Journal Citation41 (1), pp. 85-91
Number of Pages7
Year2012
PublisherSpringer
Place of PublicationDordrecht, Netherlands
ISSN0815-3191
1448-6032
Digital Object Identifier (DOI)https://doi.org/10.1007/s13313-011-0093-3
Web Address (URL)http://link.springer.com/article/10.1007%2Fs13313-011-0093-3
Abstract

Although rust (caused by Puccinia purpurea) is a common disease in Australian grain sorghum crops, particularly late in the growing season (April onwards), its potential to reduce yield has not been quantified. Field trials were conducted in Queensland between 2003 and 2005 to evaluate the effect of sorghum rust on grain yield of two susceptible sorghum hybrids (Tx610 and Pride). Rust was managed from 28-35 days after sowing until physiological maturity by applying oxycarboxin (1 kg active ingredient/ 100 L of water/ha) every 10 days. When data were combined for the hybrids, yield losses ranged from 13.1% in 2005 to 3.2% in 2003 but differences in yield the between sprayed and unsprayed treatments were statistically significant (P≥0.05) only in 2005. Final area under the disease progress curve (AUDPC) values reflected the yield losses in each year. The higher yield loss in 2005 can be attributed primarily to the early development of the rust epidemic and the higher inoculum levels in spreader plots at the time of planting of the trials.

KeywordsAUPDC; oxycarboxin; puccinia purpurea; rust severity; sorghum bicolor
ANZSRC Field of Research 2020310805. Plant pathology
300207. Agricultural systems analysis and modelling
300409. Crop and pasture protection (incl. pests, diseases and weeds)
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Byline AffiliationsUniversity of Queensland
Department of Employment, Economic Development and Innovation, Queensland
National Centre for Engineering in Agriculture
Institution of OriginUniversity of Southern Queensland
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