Pest, disease and weed management

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Research outcomes: A comprehensive RD&E program that addresses existing and emerging pests, diseases and weeds, allowing sugarcane growers to manage their crops efficiently with minimal environmental impacts. An enhanced industry capacity to deal with incursions of exotic pests, diseases and weeds.

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1984 - 19874

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Author: search.filters.author.Croft, BJEnd date: 1989

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Now showing 1 - 4 of 4
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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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    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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    Bioassay for comparing levels of pythium graminicola in soils
    (BSES, 1987) Croft, BJ
    In the study of any soil borne pathogen it is essential to have some technique for determining the level of the pathogen in the soil. The levels of Pythium species in soil have been measured by soil dilution plating on selective media (Dick and Ali-Shtayeh 1986. Trans. Br. Mycol. Soc. 86(1):49-62). However species with lobulate sporangia are not frequently isolated on these media and bioassay techniques have been developed for these fungi (Stanghellini and Kronland 1985. Phytopathology 75:1242-1245). In Hawaii, pineapple roots have been used as baits in a bioassay for P. graminicola Subr. (Adair 1972. Hawaii. Plant. Rec. 58:213-240). However, considerable space is required to maintain pineapple plants and they are not always readily available. Poor Root Syndrome (PRS) of sugarcane in Queensland causes serious crop losses (Egan et al. 1984 ASSCT p 1-9). A Pachymetra sp. (formerly referred to as the root rot fungus) which rots the primary roots of the sugarcane plant, and P. graminicola which can restrict fine root development, are two pathogens consistently found in affected soils (Croft and Magarey, 1984 ASSCT Conf. p 55-61). The study of the role of P. graminicola in the sugarcane PRS in Queensland has been hampered by the lack of a means of quantifying the level of this species in soils. This paper outlines the development of a sorghum bioassay (SB) for P. graminicola using sorghum seedling roots.
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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.