Completed projects and reports

Now showing 1 - 5 of 5

Survey of sugarcane in eastern Australia for sugarcane smut : SRDC final report BSS230
(BSES, 1999) Croft, BJ; Magarey, RC; Smith, DJ
Objectives of project are to: conduct specific smut surveys to determine whether sugarcane smut is present in eastern Australia. Through publicity campaigns encourage cane farmers to inspect their farms for smut. Collate all survey results and produce reports at least every year or as required. Educate industry in all aspects of smut as a threat to the eastern Australian industry.
The role of Pythium species in yield decline in Southern cane growing districts : SRDC final report BS80S
(BSES, 1998) Pegg, G; Croft, BJ; Irwin, JAG
Yield decline has been demonstrated in all established canegrowing regions of Queensland. Field and glasshouse studies with soil fumigants have shown that yield decline is largely caused by soilborne biological factors. Some evidence suggests that these factors are specific to sugarcane. Yield increases of 30-40% in field experiments with methyl bromide have been obtained in all canegrowing regions. If only 10% of this response could be obtained by partial control of deleterious soilborne microorganisms, returns to the Queensland sugar industry would be increased by more than $30m annually. Pythium species have been responsible for significant yield loss of sugarcane in Louisiana. Limited examinations of soils from the southern canegrowing districts of Queensland has shown that highly pathogenic Pythium species are present. These fungi cause severe damage to cane roots under cold, wet conditions and may be involved in poor ratooning under trash blankets in southern districts. While these fungi may cause large yield losses in central and southern canegrowing regions, their distribution and severity and the need for controls have not been adequately defined. This report briefly outlines the results of a survey of southern Australian canegrowing districts for Pythium species and glasshouse and field experiments to determine the yield losses which can be attributed to Pythium species. Detailed experimental methods and results can be found in the Master's Thesis by G Pegg entitled "The role of Pythium species in yield decline in southern sugarcane growing districts of Australia" which was the result of research conducted in this project.
Development of a fungicide spray schedule to determine the effect of sugarcane rust (Puccinia melanocephala) on yield
(BSES, 1984) Taylor, PWJ; Croft, BJ; Ryan, CC
This study reports on work carried out to develop a fungicide spray program which is suitable for yield loss assessment investigations. Aspects examined include the efficacy of various concentrations of chlorothalonil and oxycarboxin on rust, the frequency of application of one concentration of chlorothalonil or oxycarboxin on level of infection, and arrangement of spray nozzles to give good coverage of fungicides.
Soil constraints to productivity improvement
(1990) Croft, BJ; Magarey, RC; Hurney, AP; Reghenzani, JR
Yields of most crops are known to decrease if that crop is grown continuously without fallowing or rotation with other crop species. Sugarcane has been grown continuously on many fields in Queensland for 50-100 years. As early as 1934 soil-borne factors which restricted root and shoot growth were identified in fields which had grown sugarcane for a number of years. During the 1970s nematodes were found to be causing serious losses in Bundaberg on certain soil types and a serious root disease complex known as poor root syndrome was identified in northern Queensland. During the 1980s intensive research into poor root syndrome identified the important new disease Pachymetra root rot and a number of minor fungal pathogens. Poor root syndrome has been identified in all regions of Queensland and general poor root health has been noted in all soils which have grown sugarcane for a number of years. Yield increases of 50-100% were obtained in areas severely affected by poor root syndrome in northern Queensland by soil fumigation with methyl bromide and metham sodium, and by soil solarisation. Recent experiments have recorded yield responses of 20-40% to methyl bromide fumigation in all major sugarcane regions. These experiments suggested that yield losses due to soil-borne factors may be greatly restricting yields throughout the sugar industry. Research to identify the causes of the yield losses has commenced and progress to date is summarised in this paper.
The effect of sugarcane rust (Puccinia melanocephala) on yield
(BSES, 1985) Taylor, PWJ; Croft, BJ; Ryan, CC
This report details the results obtained from two trials to assess yeild loss caused by sugarcane rust and also outlines the epiphytotiology of the rust disease.

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