Weed Science Commons^™

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

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 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.

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

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.

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

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

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.

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

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

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 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.

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 …

Post Emergence Weed Control In Lupins., R. Madin, J. Buckley

Experimental Summaries - Plant Research

As a general assessment in can be said that Tigrex is a safe and efficient herbicide for control of radish in wheat. Brodal alone was generally unsatisfactory for radish control. While Diuron + Brodal was safe and efficient, Ally and Brodal should not be used together. Diuron + MCPA gave poorer control than one would normally expect.
87WH67

Control Of Prickly Saltwort (Salsola Kali) In Pasture., G. Fleay, R. Ramm

Experimental Summaries - Plant Research

Trial 87LG65

Glean post-em @ 10 and 15 g/ha gave good control.

A later trial gave good control with Garlon 4800 or 2,4-D amine when sheep grazed the weed after treatment. Considerable pasture damage would be done with all chemicals during the growing season.

Radish Control In Lupins - "Topping Up" With Simazine, D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of post-emergence applied Simazine on wild radish and lupins.
87GE83, 87TS36, 87MO53, 87NO90

Isoproturon Evaluation - Timing Of Application On Efficacy And Crop Damage., R. Madin, J. Buckley

Experimental Summaries - Plant Research

The trial was effectively a tolerance trial. Best overall weed control was achieved with Glean and the higher rates of Isoproturon which in turn gave best control as a pre-plant, incorporated treatment.
87A23, 87WH54

Radish Control In Lupins - Comparison Of Options, D J. Gilbey

Experimental Summaries - Plant Research

To study the effect of several herbicide options on wild radish and lupins.
87GE82, 87TS34, 87MO54, 87NO87.

Peas - Mcpa Crop Tolerance Time Of Application, D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of time of spraying MCPA on peas.
87A36

Peas - New Herbicides., D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of several new herbicides on peas and weeds.
87A35

Radish Control In Lupins - Probe, D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of Probe on lupins and wild radish.
87MO55.

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.

Peas - Mcpa Amine Vs Na Salt, D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of MCPA amine and Na salt on peas and weeds.
87A39

Peas - Broadleaf Weed Control, D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of several herbicides on peas and weeds.
87C70, 87KA81.

Faba Beans, Chick Peas, Lentils And Vetch - Herbicide Efficacy., D. J. Gilbey, G. H. Walton, J. Warren

Experimental Summaries - Plant Research

To study the effect of several herbicides on weeds, Faba bean, vetch, lentils and chick peas.
87KA82.

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.

Post Emergence Weed Control In Lupins., D. J. Gilbey

Experimental Summaries - Plant Research

To study the effect of post emergence herbicides on lupins and weeds.
87WH56, 87WH65.

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.

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.

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 …