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Virus, Viroid, Mycoplasma And Rickettsial Diseases Of Plants In Western Australia, L K. Price, George Mclean
Virus, Viroid, Mycoplasma And Rickettsial Diseases Of Plants In Western Australia, L K. Price, George Mclean
Technical Bulletins
Provides details of the virus, viroid, mycoplasma and rickettsial diseases recorded on plants in Western Australia. To establish these records, a range of tests have been used including sap transmission; leaf dip electron microscopy; aphid transmission and serology. The authenticity for each record is noted in the list of pathogens.
Fluoride Toxicity In Grape Vines : A Case Study, Walter Jacob Cox, L T. Jones
Fluoride Toxicity In Grape Vines : A Case Study, Walter Jacob Cox, L T. Jones
Technical Bulletins
The onset of visual damage varied with the season. The symptoms consisted of marginal and tip necrosis in the early stages with the necrotic areas gradually expanding between the veins. In severe cases the leaves shed. Old leaves were affected first although foliage of any age was affected in cases of severe fluoride pollution. Plant analysis indicated that damage was associated with concentrations in excess of 20 ppm fluoride.
Effect Of Dusts On Tomato Production, Walter Jacob Cox, L T. Jones, Dennis R. Phillips
Effect Of Dusts On Tomato Production, Walter Jacob Cox, L T. Jones, Dennis R. Phillips
Technical Bulletins
The phytotoxicity of bauxite, cement flue, mud lake, alumina and kaolin dusts were examined on tomatoes. Mud lake white dust caused severe leaf scorch, affected plant growth and resulted in no harvestable yield. Flue dust applied daily depressed market yield of fruit from 64 t ha to 42 t ha. Flue dust applied at 3.1 t ha had no effect. There was no phytotoxic effect from bauxite, alumina or kaolin.
A Report On Erosion And Range Condition In The West Kimberley Area Of Western Australia, A L. Payne, A Kubicki, D G. Wilcox, L C. Short
A Report On Erosion And Range Condition In The West Kimberley Area Of Western Australia, A L. Payne, A Kubicki, D G. Wilcox, L C. Short
Technical Bulletins
Nearly 30 per cent (26 700 sq. kilometres) of the West Kimberley survey area is in bad range condition. Nearly 51 per cent (45 400 sq. kilometres) of the area is in fair range condition. Nearly 20 per cent (17 500 sq. kilometres) of the area is in good range condition. The worst areas of degradation and erosion are on the most valuable pasture lands. These areas are readily accessible, close to permanent water supplies, and support attractive pastures. Carrying capacity estimations of the pasture lands of ded areas, co-operative programmes for rehabilitation should be planned by the station lesses …