Browsing by Author "Ryan, CC"

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    Acquisition of Fiji disease virus by Perkinsiella saccharicida kirk and observations on its instars
    (BSES, 1984) Croft, BJ; Ryan, CC
    The first, second and third instars of Perkinsiella saccharicida were the only stages which transmitted Fiji disease virus to healthy Q70 plants after a 48 hour access feed on diseased plants. A key to distinguish the developmental stages of P.saccharicida was developed with the main distinguishing features being eye colour, and the shape, length and relationship, one to the other, of the fore and hind wing pads.
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    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.
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    Inheritance of Fiji disease resistance
    (BSES, 1981) Hogarth, DM; Ryan, CC
    Various projects have been conducted in recent years to study the inheritance of resistance to Fiji disease. In this report the results of these studies are presented and the implications for the plant breeding programme discussed.
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    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.