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Foliar Diseases Of Wheat, A. G. P. Brown
Foliar Diseases Of Wheat, A. G. P. Brown
Experimental Summaries - Plant Research
Leaf disease in the wheatbelt. Wheat leaf diseases were common north of Perth. They were severe in the Moora district and catastrophic in the northern wheatbelt. Yellow spot (Pyrenophora tritici-repentis) and glume blotch (Septoria nodorum) were the major pathogens in most areas with yellow spot exceeding glume blotch in area of leaf affected for the first time since surveys began in 1971. In the south dry conditions prevailed and diseases were hard to find. Figure 1 gives the distribution in the various zones for 1983 excluding the Esperance district which was not surveyed. Stress damage induced mostly by water stress …
Chemical Efficacy Trials, E Carter
Chemical Efficacy Trials, E Carter
Experimental Summaries - Plant Research
Please find attached summaries for the following six chemical efficacy trials:- 83PE51 - Control of powdery scab of potatoes. 83MD7 - Control of early blight of tomatoes. 83MD11 - Control of sclerotinia in lettuce. 83MD12 - Control of secondary black rot in cabbage. 83MD13 - Control of tuber-borne Rhizoctonia solari of potatoes. 83MD14 - Control of downy mildew of onions. The following trial has not yet been harvested:- 83MD15 - Chemical control of onion smudge.
Summary Of Medic-Rhizobium Field Experiments, J G. Howieson
Summary Of Medic-Rhizobium Field Experiments, J G. Howieson
Experimental Summaries - Plant Research
83ME9 - Nutrition of R. meliloti in acid soil. - Meaningful results only available in 1984/85 Summary of Medic-Rhizobium Field Experiments 1983/84. 83ME87 - Effect of pH of culture conditions on survival in, and colonisation of, an acid soil by R. meliloti. - Meaningful results available 1984/85. (82ME22, 82ME22A, 82ME23) Survival and colonisation of acid soils by 18 strains of R. meliloti in association with 6 Medicago hosts. - Results discussed in this summary.
Barley Foliage Diseases, T N. Khan, K. Brain, M Judges
Barley Foliage Diseases, T N. Khan, K. Brain, M Judges
Experimental Summaries - Plant Research
General comments and highlights
Scald: Effect of time of application - 83BA10, 83MT9.
Scald: Effect of rate of fungicide – 83BA11.
Scald: Comparing fungicides – 83BA42.
Scald: Effect of seeding rate – 83BA12, 83MT10.
Scald: Response to fungicide in farmer's field – 83AL18, 83AL81, 83AL82.
Scald: Variation in pathogenicity – 83AB11, 83BA13, 83MT11, 83WH7.
Scald: Cultivar x fungicide in farmer's field – 83LG63.
Net Blotch: Potential yield losses – 83A15, 83BA15, 83WH6.
Net Blotch: Screening new fungicides – 83BA43.
Spot-type net blotch: Potential yield losses – 83C5.
Spot-type net blotch: Sources of resistance - Chapman Research Station, Nabawa.
Powdery mildew …
Plant Viruses, G D. Mclean
Plant Viruses, G D. Mclean
Experimental Summaries - Plant Research
1. Alfalfa mosaic virus: incidence in white clover. McLean, G.D., Weir, J.A., Russell, W.K., Speijers, E.J. and Price, L.K. - 83HA30, 83HA31, 83HA32, 83HA33, 83HA34, 83HA35, 83HA36, 83HA37, 83HA38, 83HA39. 2. Alfalfa mosaic virus: re-infection in white clover. McLean, G.D., Weir, J.A., Russell, W.K., Price, L.K. and Speijers, E.J. – 83HA43, 43HA44, 43HA45, 43HA46, 83HA47, 83HA48, 83HA49, 83HA50, 83HA51, 83HA52. 3. Lettuce necrotic yellows virus: incidence. McLean, G.D., Phillips, D.R., Speijers, E.J. Sandow, J.S. and Price, L.K. – 83PE21, 83PE22, 83PE23, 83PE24, 83PE25, 83PE26, 83PE27, 83PE28, 83PE29, 83PE30.
Survey Of Fungi Associated With Diseased Lupin Roots, M Sweetingham
Survey Of Fungi Associated With Diseased Lupin Roots, M Sweetingham
Experimental Summaries - Plant Research
1. Survey of fungi associated with diseased lupin-roots. Cylindrocarpon was only encountered on the south coast (Albany and Esperance districts). The isolates were identified as c. didymum and c. destructans. At certain sites in the two northern districts (Geraldton and Moora) a distinct type of disorder, characterised by reddish-brown coloured lesions which develop on the below ground portion of the hypocotyl, was observed. 2. Assessment of lupin root disease in lupin permanent disease nurseries – 78WH20, 78BA51, 78C34, 78MT38, 80E21. 3. Effect of fungicide drenches on lupin root rots – 83MT17, 83WH9. 4. Mini plot seed treatment trials on lupins …
Lupin Diseases, P Mcr Wood
Lupin Diseases, P Mcr Wood
Experimental Summaries - Plant Research
Fungicide treatment of lupin seed - 83GE45, 83GE46, 83GE47. Fungicide treatment of lupin seed in polyculture - 83NO48, 83BU21. Levels of Pleiochaeta in different organic fractions - 83AL51 (2 sites). Phomopsis levels on post-harvest samples - 83AL51.