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Articles 61 - 90 of 130
Full-Text Articles in Agronomy and Crop Sciences
The Demography Of Doublegee. Ecological Studies On Arum Lily., F. D. Panetta
The Demography Of Doublegee. Ecological Studies On Arum Lily., F. D. Panetta
Experimental Summaries - Plant Research
3.1 Growth of doublegees under summer irrigation. (87A40)
The weevil, Perapion antiquum is a potential biological control agent of doublegee. However, it exhibits large population crashes during the summer months in the summer-dry areas of the Western Caped of South Africa, where it is native. It has been suggested that one means of successfully establishing Perapion in Western Australia could be to maintain populations in 'oases' over the summer months. The aim of this experiment was to determine how readily doublegee could be maintained in a non-senescent phase under irrigated and shaded conditions.
3.2 Doublegee demography in cereal crops (87GE30) …
Effect Of Different Chemical Treatments On Capeweed Control And Crop Yield., J. R. Peirce, B. J. Rayner
Effect Of Different Chemical Treatments On Capeweed Control And Crop Yield., J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87WH60
Control of capweed was obtained using post-emergence in-crop herbicides. Good control was on most of the treatments applied before seeding.
Most products showed good ryegrass control are not usually effective, assume some other factor operating. Treatment usually associated with good ryegrass control have higher ryegrass densities than the treatments using herbicides with only broadleaved variety.
Although large reductions in density of silvergrass were obtained none was significantly better than the unsprayed. Some treatments particularly those favouring grass dominance allowed silvergrass density to build up.
Bromegrass appears to be very sensitive to competition from capeweed. Where there was high …
The Ecology Of Skeleton Weed In Western Australia. Survival And Reproduction Of Wild Radish Populations, F. D. Panetta
The Ecology Of Skeleton Weed In Western Australia. Survival And Reproduction Of Wild Radish Populations, F. D. Panetta
Experimental Summaries - Plant Research
1.1 Skeleton weed demographic studies (84BA17)
To determine potential growth rates of skeleton weed populations on contrasting soil types.
2.1 Wild radish demography in lupin crops (87GE86) - the results are missing in the report please see in supplementary content
Control Of Capeweed Prior To Sowing Crop., J. R. Pierce, B. J. Rayner
Control Of Capeweed Prior To Sowing Crop., J. R. Pierce, B. J. Rayner
Experimental Summaries - Plant Research
All treatments gave significant yield benefits over the untreated. Mixtures containing diuron did not cause any significant crop damage although yields on three of the treatments using 1.5 L/ha were low despite the good weed control.
87WH59
Effect Of Time Of Spraying Prior To Seeding For Capeweed Control., J. R. Peirce, B. J. Rayner
Effect Of Time Of Spraying Prior To Seeding For Capeweed Control., J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87WH61
Significant yield increases were obtained by applying chemicals pre-sowing to control capeweed. Time of spraying also had a significant effect on crop yield. Best yields were obtained from the treatment four weeks before seeding.
Good capeweed control (four weeks before seeding) may have been due to the condition of the weeds. Prior to spraying 50 mm of rain was recorded and may have freshened up the capeweed making it more susceptible to the chemical.
Control Of Peas And Lupins In Oats, J. R. Peirce, B. J. Rayner
Control Of Peas And Lupins In Oats, J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87A30
All lupin treatments satisfactory.
Treaments 4, 8 and 9, ie Dicamba 500 ml and both treatments with diuron + 2,4-D amine would not control peas sufficiently to prevent rejection of line of oats. Peas are more difficult to control.
Chemical Control Of Four O'Clock (Oxalis Purpurea) And Narrow Leaf Oxalis (Oxalis Glabra)., J. R. Peirce, B. J. Rayner
Chemical Control Of Four O'Clock (Oxalis Purpurea) And Narrow Leaf Oxalis (Oxalis Glabra)., J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 97NO95
Control of small leaved Oxalis - Logran gave reasonable control. Post seeding treatments using Isoproturon gave very poor control.
Control of Oxalis purpurea (Four O'clock) - Logran either as a single application or a mixture with Isoproturon gave best control.
Control of clover - Isoproturon 4 L (post), Ally and Logran (40 g) gave 100% control.
Control of erodium - Logran gave very poor control.
Control of grasses - Isoproturon 2 & 4 Li/ha post emergent gave the best control of grasses.
Control of Four O'clock in cereals - Crop yield - Treatments using single doses of Isoproturon …
Control Of Four O'Clock (Oxalis Purpurea) In Cereals., J. R. Peirce, B. J. Rayner
Control Of Four O'Clock (Oxalis Purpurea) In Cereals., J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87KA85
Because of the late dry season, yields were below expected. Under these conditions there were high visual crop damages recorded early after the treatments applied.
Control Of Soursob (Oxalis Pres-Caprae) In Cereals, J. R. Pierce, B. J. Rayner
Control Of Soursob (Oxalis Pres-Caprae) In Cereals, J. R. Pierce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87NO107
Plant counts for soursob and Four O'clock will be more accurate when counts taken after the break of 1988 season to determine the bulb production from last season.
Ally gave good control of doublegee. Isoproturon or mixtures with Isoproturon also gave good doublegee control. Logran & Glean were weak on doublegee.
Chemical Control Of Skeleton Weed., J. R. Peirce, B. J. Rayner
Chemical Control Of Skeleton Weed., J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial PE17
Tordon 50 D & Lontrel L appear to be the only chemicals that will give effective reduction in the density of skeleton weed. However both these chemicals also removed all other broadleaved weeds present (capeweed, clover and flatweed), leaving the treated areas grass dominant.
Control Of Saffron Thistle In Pasture Using Goats., J. R. Peirce, B. J. Rayner
Control Of Saffron Thistle In Pasture Using Goats., J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 85TS27 / 87TS27
Saffron thistle seedling densities remained relatively constant during the first two years of the trial, irrespective of the grazing treatments' effectiveness. However on the grazing treatments where goats were preventing seed formation, once the bulk of dormant seeds had been depleted, seedling density started to decline.
Saffrom Thistle, Seed Set Control, J. R. Peirce, B. J. Rayner
Saffrom Thistle, Seed Set Control, J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87ME119 - Saffron thistle, seed set control.
Trial 87TS38 - Saffron thistle control (seed set)
Trial 87JE42 - Seed set control in Saffron thistle.
All treatments had some measure of reducing seed production. Best control was obtained by applying chemicals just at or prior to flowering.
Lincoln Weed Control In Cereals And Pasture., I. Hudson, R. Ramm
Lincoln Weed Control In Cereals And Pasture., I. Hudson, R. Ramm
Experimental Summaries - Plant Research
Trial 87LG62 - Lincoln weed control in cereals.
Blanket treatment with Glyphosate controlled some ryegrass. Additional treatment with Glean killed nearly all the ryegrass and gave the best kill of Lincoln weed.
Trial 87LG63 - Control of weed in pasture.
Ally and Glean although giving control, would be considered too phytotoxic to use on legume pastures. Applications of 2,4-D amine at 1 L would give marginal safety on Subterranean clovers, but would cause significant damage to medics.
Control Of Wild Statice (Limonium Sinuatum) In Pasture., B. Kimber, R. Ramm
Control Of Wild Statice (Limonium Sinuatum) In Pasture., B. Kimber, R. Ramm
Experimental Summaries - Plant Research
Trial 87LG64
Wild Statice is a prolific seeder. Glean + diuron treatments, which were not included in trial gave good control, as did the farmer's treatment using Tribunil followed by heavy grazing. Later applications may be more effective because they may prevent seed formation for that year and also prevent the plant from recovering from spraying, as apparently with the early spraying.
Most chemical treatments would cause damage to broadleaved pasture.
Topsoil Displacement Methods For Crop Establishment. (Wheat And Barley), J. H. Moore, G. R. Dean
Topsoil Displacement Methods For Crop Establishment. (Wheat And Barley), J. H. Moore, G. R. Dean
Experimental Summaries - Plant Research
Trial No. 87AL28.
1. To create a reduced disease situation around the crop seed by placing surface soil from the seed row into the inter row zone.
2. to provide a more wettable, less weedy, less acidic environment for cereal seed by placing surface soil from the seed row into the inter row zone.
3. To improve seedling establishment and growth by packing the seeding rows only.
Fumitory Control In Lupins With Brodal Herbicide., J. H. Moore, G. R. Dean
Fumitory Control In Lupins With Brodal Herbicide., J. H. Moore, G. R. Dean
Experimental Summaries - Plant Research
Trial 87AL44
To determine the efficacy and phytotoxicity of the herbicide Brodal on lupins, by itself and tankmixed with Simazine, Diuron and Igran.
History Effects On Wheat Response., J. H. Moore, G. R. Dean
History Effects On Wheat Response., J. H. Moore, G. R. Dean
Experimental Summaries - Plant Research
Trial 85AL42
To determine the effects of tillage, sowing density, and time of planting of Osprey and Aroona on the pest and disease incidence, early growth and yield.
Pasture Manipulation And Spraytopping For Barley Grass In A Medic Pasture., P. Stewart, L. Mann
Pasture Manipulation And Spraytopping For Barley Grass In A Medic Pasture., P. Stewart, L. Mann
Experimental Summaries - Plant Research
Trial 87KA53
The experiment was designed to determine:
1.The relative effectiveness of three herbicides with differing modes of action for barley grass control.
2. The phenological development stage at which barley grass is most susceptible to the common spraytopping herbicides.
3. The effects of early (pasture manipulation) and late (spraytopping) herbicide application on pasture production, pasture quality, barley grass control, medic growth and medic seed set.
4. The effects the herbicides have on the grain yield of a following cereal crop.
The Tolerance Of Legumes To Broadleaf Herbicides., P. Stewart, L. Mann
The Tolerance Of Legumes To Broadleaf Herbicides., P. Stewart, L. Mann
Experimental Summaries - Plant Research
Trial 87KA52
The control of broadleaf weeds in leguminous pasture is of major concern because of the ability of these weeds to compete strongly with the leguminous plants. The presence of broadleaf weeds in pasture reduces the pastures nutritional value as well as total nitrogen fixation. There are many herbicides which are available to control broadleaf weeds, but most of these are registered for use in cereals. The amount of tolerance that leguminous pasture plants show to many of these herbicides and herbicide mixes is not known.
The experiments were designed to screen a large number of herbicides for legume …
Phenological And Reproductive Development Of The Four Major Grass Species, P. Stewart, L. Mann
Phenological And Reproductive Development Of The Four Major Grass Species, P. Stewart, L. Mann
Experimental Summaries - Plant Research
Trial 87KA51
The decision of when to spray is one of the major difficulties encountered when spraytopping grassy pasture for seed set control. Previous work has shown the general herbicide application timing window for the major grasses, but within this window, the amount of seed set control achieved can still be poor. Obviously timing within this window needs to be more rigorously defined. The fundamental question we need to answer is; when do the target grasses begin to produce viable seed in relation to their phenological development and in relation to other grass species? If we know this, then herbicide …
Grass Control In Lupins, J. H. Moore, G. R. Dean
Grass Control In Lupins, J. H. Moore, G. R. Dean
Experimental Summaries - Plant Research
Trial 87AL32
1. To achieve 100% grass control at minimum cost and minimum phytotoxicity.
2. To determine the relationship between the level of grass in a break crop and the level of disease in a following cereal crop.
Effects Of Residue Levels Of Glean On Lupin Growth, And Possible Synergism By Hoegrass., Terry Piper, Patrick Pigott
Effects Of Residue Levels Of Glean On Lupin Growth, And Possible Synergism By Hoegrass., Terry Piper, Patrick Pigott
Experimental Summaries - Plant Research
Trial 87PE37
This trial was conducted to confirm the results of 86WH53 and 87WH64. The trial commenced in September and in a glasshouse thus temperatures were higher and growth faster then in the field trials.
There are no significant effects of soil applied Glean or Hoegrass, and no interaction between the two herbicides.
In contrast, there is a very significant stunting of plants by Glean applied post emergence if Hoegrass is co-applied, but not by Glean alone.
Effects Of Residue Levels Of Simazine On Wheat Growth, And Possible Synergism By Glean., Terry Piper, Patrick Pigott
Effects Of Residue Levels Of Simazine On Wheat Growth, And Possible Synergism By Glean., Terry Piper, Patrick Pigott
Experimental Summaries - Plant Research
Trial 87PE36
A previous field test 86N33 had suggested that an apparent simazine residue affect on wheat growth might be exacerbated by Glean. This trial was carried out to further test the herbicide combination.
Control Of Doublegee In Sub. Clover And Medic Pastures., P. Stewart, L. Mann
Control Of Doublegee In Sub. Clover And Medic Pastures., P. Stewart, L. Mann
Experimental Summaries - Plant Research
Trial 87ME61, 87ME68, 87WH49, 87ES39, 87NO80(B), 87NO80, 87WH67.
Doublegees in pasture are a major concern of many farmers in most of the agricultural areas in Western Australia. In pasture, doublegees tend to compete strongly the first year after crop and then decline in subsequent years. When cropped, doublegees again appear in large numbers. Unfortunately, the WADA recommendation for doublegee control in pasture of Tribunil at 850 g/ha is now very expensive at $17/ha. A possible alternative is 2,4-D amine, but medics are very sensitive to this. 2,4-DB is another recommendation, but this tends to have low efficacy against doublegees and …
Glean Use On Drier Alkaline Soils, Terry Piper, Patrick Piggott
Glean Use On Drier Alkaline Soils, Terry Piper, Patrick Piggott
Experimental Summaries - Plant Research
Trial 86SG25 - Salmon Gums Research Station
There was no apparent evidence of chlorsulfuron carryover at either site, although the medic stand was visually assessed as thinned on 19/8/1987. In the absence of grazing pressure however, the remaining plants compensated by 25/9/1987.
Trial 87WH64 : The effects of low levels of Glean on lupins, in the presence of Hoegrass or Fusilade. Wongan Hills Research Station
This trial is a duplicate of 86WH53 and the results can be considered together.
Statistical analysis has shown a very highly significant effect of Glean on lupin growth in 1987, and on seed yield in …
Trace Element Nutrition. Tissue Testing Programme 1987, R. F. Brennan
Trace Element Nutrition. Tissue Testing Programme 1987, R. F. Brennan
Experimental Summaries - Plant Research
Project title: Evaluation of existing diagnostic procedures for the recommendation of trace element fertilizers.
Aim: To compare the accuracy and reliability of a range of tissue and soil tests being variously promoted for use to farmers for the diagnosis and prognosis of zinc and copper deficiencies in wheat crops on Western Australian farms.
Trial 87N23
Nitrogen rates on the main copper plots of the long term copper residual trial at Newdegate Research Station.
Location: Newdegate Research Station
To determine the effects of rates of nitrogen on the copper status of plants.
Trial 87LG33
Effects of rates of nitrogen on the …
Crop Establishment Methods For Lupin Disease Management, M Sweetingham, V Chisholm, A Pelham
Crop Establishment Methods For Lupin Disease Management, M Sweetingham, V Chisholm, A Pelham
Experimental Summaries - Plant Research
Contents
A. Crop establishment methods for lupin disease management
1. Pleiochaeta root rot
1.1 Depth of sowing
87LG32, 87LG36, 87ME60, 87ME75
1.2 Cultivation and sowing depth
87WH47, 87NO77, 87M54
1.3 Seeding machinery and sowing depth
2. Brown leaf spot/Pleiochaeta root rot
Phosphorus nutrition and crop rotation
87ME62, 87LG39
3. Rhizoctonia hypocotyl rot
Fungicide seed treatment and sowing depth
87BA25
4. Rhizoctonia root rot
4.1 Cultivation and sowing depth
87NO74
4.2 Fungicide seed treatment
87NO78
B. Fungicide drench trials to determine casual organisms of root/hypocotyl rot 87NO75, 87NO76.
Control Of Peach Leaf Curl, P Mcr Wood, W Pickkering
Control Of Peach Leaf Curl, P Mcr Wood, W Pickkering
Experimental Summaries - Plant Research
87S2, 87MC39, 87BY35, 87AL42, 87MC38, 87SW1.
Peach leaf curl , Apple mildew, Rot in Pears
Virus Diseases Of Lupins Virus Diseases Of Pastures, R A.C Jones, A. Baker, K. Clarke, F. Jones
Virus Diseases Of Lupins Virus Diseases Of Pastures, R A.C Jones, A. Baker, K. Clarke, F. Jones
Experimental Summaries - Plant Research
Virus diseases of lupins.
Bean yellow mosaic virus and cucumber mosaic virus
Effect of CMV isolate
Effect of pod position
Effect of dry conditions on establishment
Effect of cultivar on seed transmission rates
Effect of reflective mulch
Survey of commercial seed stocks.
Virus disease of pastures
Bean yellow mosaic virus and cucumber and alfalfa mosaic viruses
Symptoms
Distribution
Seed-borne infection
Persistence
Recommendations for control
Lupin phyllody disorder
Barley yellow dwarf virus
Publications
Trends In Wheat Protein/Yield Relationships, G B. Crosbie, Harry Fisher, Bryan Whan
Trends In Wheat Protein/Yield Relationships, G B. Crosbie, Harry Fisher, Bryan Whan
Journal of the Department of Agriculture, Western Australia, Series 4
The major concern of wheat breeders in WesternAustralia has been to increase grain yield while maintaining quality at an acceptable level. There has been no concious effort to select for protein content. It is of interrest, therefore, to compare the relationship between yield and protein of varieties which have been prominent in Western Australia at various times, to see what effects yield increases have had on protein content and the extent of any variation which might exist.