Stem rot of rice in the Murrumbidgee Irrigation Area of New South Wales

Surveys of petal infestation and stem infection conducted in 1998, 1999 and 2000 indicated that Sclerotinia sclerotiorum poses a threat to the Australian canola industry. Inoculum was present throughout all canola-growing regions of New South Wales and the stem disease was widespread throughout southern New South Wales. Percentage petal infestation increased over the 3 years surveyed with values ranging from 0 to 99.4%. The highest petal infestation values were observed in 2000 (maximum of 99.4%, mean of 82.2%), with lower mean values in 1998 (38.4%) and 1999 (49.6%). Stem infection ranged from 0 to 37.5% and most fields had less than 10% stem infection. Stem rot incidence before harvest did not relate to percentage petal infestation determined during flowering. This indicated that factors other than percentage petal infestation were important in influencing stem rot incidence. While there was no relationship between percentage petal infestation and stem rot incidence, stem infection never occurred without prior petal infestation.

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Varieties of tomatoes for mechanical harvesting on the Murrumbidgee Irrigation Area of NSW

Australian Journal of Experimental Agriculture ◽

10.1071/ea9670380 ◽

1967 ◽

Vol 7 (27) ◽

pp. 380

Author(s):

JB Sumeghy ◽

HC Kirton

Keyword(s):

Nitrogen Fertilizer ◽

New South ◽

New South Wales ◽

Planting Density ◽

Plant Spacing ◽

Irrigation Area ◽

South Wales ◽

Time Of Harvest

To test the potential suitability of ten tomato varieties in the Murrumbidgee Irrigation Area of New South Wales to mechanical harvesting, the yields from 'once-over' harvests were compared with the yields from a harvest consisting of four pickings at weekly intervals. In a second experiment the effect of plant spacing, time of harvest, and side-dressing with nitrogen fertilizer were studied for the most promising varieties from the first experiment. The varieties Roma 884, VF145-22-8, and VF145 held their crops for prolonged periods without deterioration and so showed potential for mechanical harvesting. High planting density gave the highest yields from a single picking, and later picking and nitrogen side-dressing also increased yield.

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The chemistry of shallow groundwaters in the Murrumbidgee irrigation area, New South Wales

Soil Research ◽

10.1071/sr9870251 ◽

1987 ◽

Vol 25 (3) ◽

pp. 251 ◽

Cited By ~ 1

Author(s):

BG Williams ◽

JK Ward

Keyword(s):

New South ◽

New South Wales ◽

High Ionic Strength ◽

Degree Of Saturation ◽

Simple Relationship ◽

Irrigation Area ◽

South Wales ◽

Initial Salt ◽

Calcium Minerals ◽

Supply Water

The chemistry of shallow groundwaters in the Murrumbidgee Irrigation Area of New South Wales, Australia, is examined in terms of the degree of saturation with calcium minerals. Many water samples were found to be saturated with calcite, especially when brought into equilibrium with atmospheric CO2 pressures; gypsum saturation was found more frequently from regions having waters of high ionic strength. A thermodynamic chemical model is used to describe the effects on water 'quality', for irrigation purposes, if the groundwaters are to be reused in mixtures with irrigation supply water. A tentative classification in terms of salinity and sodium hazard is presented and a simple relationship between both hazards has been derived. A potential exists for using between 25% and 95% groundwater in mixtures with supply water for irrigation, depending on the initial salt concentration.

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Susceptibility of Australian Feral Mice to Ectromelia Virus

Wildlife Research ◽

10.1071/wr9860049 ◽

1986 ◽

Vol 13 (1) ◽

pp. 49 ◽

Cited By ~ 1

Author(s):

JA Roberts

Keyword(s):

New South ◽

New South Wales ◽

The Other ◽

Laboratory Mice ◽

Ectromelia Virus ◽

Irrigation Area ◽

Innate Resistance ◽

South Wales ◽

Western Victoria

Feral mice from western Victoria, the Murrumbidgee Irrigation Area and the Northern Tablelands of New South Wales, and the Darling Downs of south Queensland, have been infected with ectromelia virus in a laboratory. There is no evidence that the virus is endemic in the feral mice. The infectivity of ectromelia is similar in all groups of feral mice, and in laboratory mice. The lethality of the infection is high in the Victorian mice, whereas mice from the other regions have moderate to high levels of innate resistance. Possible consequences of the release of ectromelia, to prevent or terminate mouse plagues, are discussed.

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Impact of tillage on lupin growth and the incidence of pathogenic fungi in southern New South Wales

Australian Journal of Experimental Agriculture ◽

10.1071/ea03140 ◽

2004 ◽

Vol 44 (1) ◽

pp. 53 ◽

Cited By ~ 5

Author(s):

S. Simpfendorfer ◽

D. P. Heenan ◽

J. A. Kirkegaard ◽

K. D. Lindbeck ◽

G. M. Murray

Keyword(s):

New South ◽

New South Wales ◽

Pathogenic Fungi ◽

Early Growth ◽

Brown Spot ◽

Stem Rot ◽

Wheat Crop ◽

Seedling Vigour ◽

South Wales ◽

Lower Biomass

Narrow-leafed lupins (Lupinus angustifolius) were grown in cultivated and direct-drilled plots at 4 field sites in southern New South Wales in 1998 to determine the effect of tillage on seedling vigour, disease and yield. The early growth of lupins in direct-drilled plots was reduced compared with seedlings in cultivated plots at 3 of the sites. However, the biomass of lupin plants in the direct-drilled treatments was 20% greater than in adjacent cultivated plots at harvest. The lower biomass in cultivated plots appeared to be primarily related to an increased incidence and severity of stem rot caused by Sclerotinia sclerotiorum. The increased stem rot in cultivated plots was also associated with a decline in yield of between 16 and 35% across the sites compared with direct-drilled plots. The direct-drilled treatment reduced the severity of brown spot, caused by Pleiochaeta setosa, at the 2 sites where stubble was retained from the previous wheat crop. These results suggest that direct drilling into cereal residue provides benefits over cultivation for the growth of lupins in southern New South Wales where crop infection by Sclerotinia and/or brown spot may be significant.

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The prevalence and severity of diseases in the coastal soybean crop of New South Wales

Australian Journal of Experimental Agriculture ◽

10.1071/ea9910545 ◽

1991 ◽

Vol 31 (4) ◽

pp. 545 ◽

Cited By ~ 3

Author(s):

GE Stovold ◽

HJP Smith

Keyword(s):

Pseudomonas Syringae ◽

Xanthomonas Campestris ◽

New South ◽

Soybean Mosaic Virus ◽

New South Wales ◽

Coastal Region ◽

Leaf Blight ◽

Stem Rot ◽

Phytophthora Megasperma ◽

South Wales

Rainfed soybean (Glycine max) crops in the northern coastal region of New South Wales were surveyed from 1985 to 1987 for the prevalence and severity of diseases. Sixteen diseases were recorded over the 3 seasons, but only rust (Phakopsora pachyrhizi), black leaf blight (Arkoola nigra) and bacterial pustule (Xanthomonas campestris pv. glycines) were present each season. Rust was the most significant disease, infecting 50, 20 and 6% of crops in 1985, 1986 and 1987. The severity of rust was related to rainfall and temperature after flowering, with the most severe outbreaks in the higher rainfall area of the lower Richmond Valley. Black leaf blight was also significant and occurred in 39, 10 and 27% of crops in 1985, 1986 and 1987, but in most crops severity was low. The other diseases recorded were downy mildew (Peronospora manschurica), root and stem rot (Phytophthora megasperma f. sp. glycinea), stem canker (Rhizoctonia sp.), pod and stem blight (Phomopsis spp.), anthracnose (Colletotrichum spp.), seedling blight (Rhizoctonia sp.), stem rot (Phytophthora sp.), white mould (Sclerotinia sclerotiorum), flower blight (Botrytis cinerea), leaf spot (Phoma sp.), bacterial blight (Pseudomonas syringae pv. glycinea), mosaic (soybean mosaic virus) and orange bark (not identified). All of these diseases were generally of low prevalence and severity.

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