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Articles 61 - 90 of 176
Full-Text Articles in Physical Sciences and Mathematics
Control Of Cereal Crop Diseases By Manipulation Of Pasture Composition., W Macleod
Control Of Cereal Crop Diseases By Manipulation Of Pasture Composition., W Macleod
Experimental Summaries - Plant Research
Rotation for wheat comparing pure clover ley with a pasture ley, 79E15.
Pasture renovation techniques and crop production in a 1:2 rotation, 81E35.
Pasture manipulation – effects on take all, 85E32.
Timing of spray topping and herbicides, 86MT64, 86E55.
Effect of herbicide application on take all inoculum, 87MD12.
The effects of pre and post sowing herbicides on wheat root diseases.
Herbicide disease interaction in recommended varieties, 87E29, 87MT51.
Lupin Seeding Rates, Pea Seeding Rates, And Weed Control., K. French, A. Little
Lupin Seeding Rates, Pea Seeding Rates, And Weed Control., K. French, A. Little
Experimental Summaries - Plant Research
Lupin seeding rates, 87ME70. Lupin seeding rates on deep soils, 87ME71. Lupin seeding rates on shallow duplex or gravel soils, 87N27. Lupin seeding rates on deep soils, 87N28, 87A27. Lupin seeding rates on shallow duplex or gravel soils, 87KA54, 87TS32, 87NA88, 87M066, Lupin seeding rates on heavy soil, 87A26, 87TS33. Lupin seeding rate by seed size, 87ME92. Pea seeding rates, 87ME72, 87KA56. Broadleaf weed control in field peas, 87LG41. Grass control in peas, 87LG53
Disease And Insect Resistance; Murex Medic Evaluation; Legume Species Phasic Development, D J. Gillespie
Disease And Insect Resistance; Murex Medic Evaluation; Legume Species Phasic Development, D J. Gillespie
Experimental Summaries - Plant Research
A summary of the performance of the control varieties (four replications) is shown in Table 3. A summary of the root rot ratings for some varieties showing a range of root rot susceptibility to all four pathogens is given in Table 4. Plant weights were recorded for all varieties tested against the three pathogens in the Western Australian experiments. Results for 12 of the 60 varieties are shown in Table 5. Murex medic evaluation. 86MT56 (Mount Barker), Gravelly loam pH 5.2 (water). 86NA46 (Darken) Loamy sand pH 5.4 86M037 (Regans Ford) Fine red sand pH 5.8 All sites were established …
Manipulation Of The Soil Seed Reserves Of Bromus Diandrus And B. Rigidus By Enhancing The Breakdown In Seed Dormancy., A H. Cheam
Experimental Summaries - Plant Research
Location: South Perth Field Plots
Previous studies on the seed bank of Bromus diandrus indicated that shallow burial of newly shed seeds enhanced the breakdown in seed dormancy over the summer period. To bury the Bromus seeds one practical approach is to introduce sheep into the paddock.
This study is a repeat of the previous work but included B. rigidus, another species of Bromus, that is commonly ground growing in association with B. diandrus.
Location: South Perth Field Plots.
Matricaria/Globe Chamomile (Pentzia Globifera) Density And Seed Production, J. Dodd
Matricaria/Globe Chamomile (Pentzia Globifera) Density And Seed Production, J. Dodd
Experimental Summaries - Plant Research
Location: Muckinbudin.
Preliminary measurement of plant density and seed production were made in November 1987 at two infested properties near Muckinbudin.
Vermin fence herbicide trials (Established by J. R. Peirce 85ME63, 65, 68, 69, 70)
During assessment of the vermin fence herbicide trials in November 1987, certain plants in the sprayed plots were noted as being undamaged, even by the highest rates of herbicides used.
Radish Control In Lupins - Brodal., D J. Gilbey
Radish Control In Lupins - Brodal., D J. Gilbey
Experimental Summaries - Plant Research
To study the effect of Brodal on lupins and radish.
87GE84, 87TS35, 87MO52, 87NO91, 86MO33.
Brome Grass Control In Wheat, G. S. Gill, R. L. Thomas
Brome Grass Control In Wheat, G. S. Gill, R. L. Thomas
Experimental Summaries - Plant Research
Brome grass control in wheat
87GE29, 87WH9
Competition between wheat and mixtures of brome grass and doublegees.
87GE30
Wild Oat Control With Hoegrass With And Without Oil, R. Madin, J. Buckley
Wild Oat Control With Hoegrass With And Without Oil, R. Madin, J. Buckley
Experimental Summaries - Plant Research
Trial 87NO08
All treatments except Combine + Oil yielded significantly better than the control. Control of wild oats with Grasp was superior to many other treatments and this was reflected in the yield.
Trial 87N009
All treatments yielded significantly better than the control however there was no difference between herbicides, rates of use or additives. The exception being 0.75 L Hoegrass +WA which yielded significantly less than Grasp + oil.
Barley Grass X Nitrogen Interaction., G. S. Gill, R. L. Thomas
Barley Grass X Nitrogen Interaction., G. S. Gill, R. L. Thomas
Experimental Summaries - Plant Research
Barley grass x nitrogen interaction.
87WH12, 87N4.
Barley grass control in wheat.
87N3, 87A3.
Competition between wheat and mixtures of barley grass and doublegees.
87A5.
Crop Establishment, R. Madin, J. Buckley
Crop Establishment, R. Madin, J. Buckley
Experimental Summaries - Plant Research
Trial effect of timing of Roundup CT and Spray.Seed application and cultivation on crop establishment and growth.
87WH53, 87NO85
The general tendency was for yield to decrease as the time to seeding after Spray.Seed application increased.
For trial 87NO85 the site was a 'problem', heavy textured soil where crop emergence problems following glyphosate had been experienced in previous years.
Crop establishment - time of seeding following herbicide application.
87A37
Use of a knockdown herbicide greatly increased yield when compared to the unsprayed treatments. Further work is required to resolve contrasting results.
Tolerance Of Ceral Varieties To Grasp, R. Madin, J. Buckley
Tolerance Of Ceral Varieties To Grasp, R. Madin, J. Buckley
Experimental Summaries - Plant Research
The site remained mostly weed free throughout the season apart from some invasion by crassula spp. between plots. Some site variation was reflected in yield variation between replicates. The effects of Grasp on all varieties of wheat and Schooner barley were evident soon after spraying.
87A34 (2)
Tolerance Of Cereal Varieties To Hoegrass + Oil, R. Madin, J. Buckley
Tolerance Of Cereal Varieties To Hoegrass + Oil, R. Madin, J. Buckley
Experimental Summaries - Plant Research
Almost invariably, Hoegrass applied to wheat and barley varieties reduced crop vigour assessed ten weeks after spraying.
87A34(1)
Rates Of Ally And Glean For Cape Tulip Control., R. Madin, J. Buckley
Rates Of Ally And Glean For Cape Tulip Control., R. Madin, J. Buckley
Experimental Summaries - Plant Research
Evaluation in 1987 indicated that Ally and Glean at all rates gave 100% control of Cape Tulip at York with minimal pasture affect on species other than clover.
87NO110, 87NO110(1), 87NO110(2), 87NO110(3)
Evaluation Of Additives With Bracken Herbicides Applied To Boomsprayer., R. Madin, J. Buckley
Evaluation Of Additives With Bracken Herbicides Applied To Boomsprayer., R. Madin, J. Buckley
Experimental Summaries - Plant Research
Treatments were applied in December 1987. Height of the Bracken made application by boom difficult due to inability to adequately raise the boom to give clearance. Some brushing of the Bracken with the boom was unavoidable. Assessment of the trial will be made in March 1988.
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
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.
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.
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.
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 …