D. Westerhuis

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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 growth of S. rolfsii in pure culture compared with benomyl at 0.5 g/L and an untreated control. This result supports anecdotal observations that(More)
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 eventual death of the affected plant. In glasshouse and field experiments, metalaxyl, potassium phosphonate, acibenzolar and tea tree oil were evaluated for the(More)
Several chemicals including strobilurins (pyraclostrobin and azoxystrobin), triazoles (difenoconazole and tebuconazole), dithiocarbamates (propineb, metiram, ziram and mancozeb) and the phthalimide chlorothalonil were evaluated in three field experiments in north Queensland, Australia, for the control of brown spot (caused by Corynespora cassiicola) and(More)
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 epidemiology and chemical control of fruit speckle. In a field planting of Lady-finger banana, bunches injected at bunch emergence with the fungicide(More)
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