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Article
Detection of Fusarium oxysporum f. sp. cubense tropical race 4 strain in northern Queensland
Fusarium oxysporum f. sp. cubense tropical race 4 (TR4) is reported for the first time in northern Queensland, the centre of Australia’s commercial banana production. The identity of the pathogen was confirmed...
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Article
Recovery, pathogenicity and molecular sequencing of Calonectria ilicicola which causes collar rot on Carica papaya in Australia
Symptoms of collar rot were observed on 3-month-old papaya plants cv. RB1. The pathogen was identified as Calonectria ilicicola based on disease symptoms, fungal morphology, pathogenicity and ITS sequencing.
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Article
Efficacy of fungicides against dam**-off in papaya seedlings caused by Pythium aphanidermatum
Various chemical and non-chemical treatments were tested for their efficacy against dam**-off in papaya seedlings caused by Pythium aphanidermatum. Three-week-old papaya seedlings were placed in a climate contr...
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Article
Aetiology, effect of chemicals, and influence of fruit exudates, insects and fruit maturity on the incidence of fruit speckle of banana
The symptoms of fruit speckle of banana are minute reddish-brown to black spots (0.5–1 mm in diameter) often with an oil-soaked or water-soaked margin. Research was conducted into the aetiology, aspects of epi...
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Article
Field and laboratory evaluations of fungicides for the control of brown spot (Corynespora cassiicola) and black spot (Asperisporium caricae) of papaya in far north Queensland, Australia
Several chemicals including strobilurins (pyraclostrobin and azoxystrobin), triazoles (difenoconazole and tebuconazole), dithiocarbamates (propineb, metiram, ziram and mancozeb) and the phthalimide chlorothalo...
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Article
Burkholderia andropogonis blight of golden cane palms in north Queensland
Nursery-grown golden cane palms (Dypsis lutescens) in north-eastern Queensland exhibited angular, water-soaked and chlorotic haloed lesions typical of blight symptoms. Bacteria isolated from oozing preparations w...
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Article
An in vitro study into the effect of glyphosate on Sclerotium rolfsii
The emergence of banana plants from planted corm pieces is known to be adversely affected by Sclerotium rolfsii, a fungal pathogen that is common in soil and plant debris. Glyphosate at 3.6 g/L reduced the radial...
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Article
Field and glasshouse evaluations of metalaxyl, potassium phosphonate, acibenzolar and tea tree oil in managing Phytophthora root rot of papaya in far northern Queensland, Australia
Phytophthora palmivora, the causal agent of Phytophthora root rot, is widespread in the papaya-growing areas of far northern Queensland. Phytophthora root rot causes decay of the tap root and eve...
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Article
A detached leaf bioassay to screen Durian cultivars for susceptibility to Phytophthora palmivora
A detached-leaf bioassay was developed and used to screen five durian (Durio zibethinus) cultivars against Phytophthora palmivora isolates from a trunk canker, root and fruit. The fruit isolate was less aggressiv...
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Article
Incidence and pathogenicity ofPhytophthora palmivora andPythium vexans associated with durian decline in far northern Queensland
In recent years, dieback of durian has become a major problem in mature orchards in the northern Queensland wet tropics region. A survey of 13 durian orchards was conducted during the dry season (July-Septembe...
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Article
Evaluation of mineral oils and plant-derived spray adjuvants, mancozeb formulations and rates of application, for the control of yellow Sigatoka leaf spot (caused by Mycosphaerella musicola) of bananas in far northern Queensland, Australia
Five mineral oils, four plant oils, and a plant-derived non-ionic sticker/adjuvant were evaluated for the control of yellow Sigatoka of banana in a field experiment in far northern Queensland, Australia. Treat...
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Article
The use of metalaxyl and potassium phosphonate, mounds, and organic and plastic mulches, for the management of Phytophthora root rot of papaya in far northern Queensland
Options for the control of root rot of papaya caused by Phytophthora palmivora were evaluated in two field experiments in far northern Queensland, Australia. In the first experiment, foliar sprays of potassium ph...
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Article
The potential of organic and inorganic soil amendments, and a biological control agent (Trichoderma sp.) for the management of Phytophthora root rot of papaw in far northern Queensland
Non-chemical options for the management of Phytophthora palmivora on papaw in far northern Queensland were evaluated in pot and field experiments. In pots, sawdust (150 m3/ha) + urea (600 kg/ha) reduced root rot,...
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Article
Quantification of inoculum density of Phytophthora palmivora in soil and its relation to disease incidence in papaw in far northern Queensland
A dilution-plate technique using five media selective for Phytophthora was evaluated at 16 and 26°C to develop a direct quantitative isolation method for Phytophthora palmivora Butler from naturally infested soil...
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Article
Control of root-knot nematode (Meloidogyne javanica) on tomato with molasses and other organic amendments
In two pot experiments in which molasses (10 g molasses/L water) was drenched regularly onto field soils infested with root-knot nematodes (Meloidogyne javanica), both root galling and nematode reproduction were ...
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Article
The use of tolerance and modification of planting times to reduce damage caused by root-knot nematodes (Meloidogyne spp.) in vegetable crop** systems at Bundaberg, Queensland
The extent to which cultural control measures could be used to reduce the need for nematicides was examined in field experiments on vegetable crops in Bundaberg, Queensland. Evaluation of the twelve most commo...
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Article
Reaction of kenaf and roselle grown in the burdekin river irrigation area to root-knot nematodes
Experiments in pots and in the field showed that root-knot nematode (Meloidogyne javanica) could cause severe damage to kenaf (Hibiscus cannabinus) in the heavy, cracking, clay soils of the Burdekin River Irrigat...
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Article
Diseases of kenaf (Hibiscus cannabinus) in the Burdekin River Irrigation Area
Kenaf (Hibiscus cannabinus) is being grown experimentally in the Burdekin River Irrigation Area in north Queensland. A Selenosporella sp. causing a root rot and wilt, is a major pathogen of water-stressed crops. ...
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Article
Fusarium solani, the cause of foot rot of tomatoes in Central Queensland
Foot rot of tomato caused by Fusarium solani was first observed at Bowen on the Central Queensland coast in 1975. Lesions occurred on the tap or main roots while young foliage was distorted and lightly mottled wi...
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Article
Distribution of a needle nematode, Paralongidorus australis, in rice fields and areas of natural vegetation in North Queensland
