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Experimental Summaries - Plant Research

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Full-Text Articles in Weed Science

1976 Phosphorus And Sulphur Sources Trials, M D. Bolland Jan 1976

1976 Phosphorus And Sulphur Sources Trials, M D. Bolland

Experimental Summaries - Plant Research

PHOSPHORUS SOURCES TRIALS (A) Pasture trials i) High rainfall areas a) Sand: 76BU1 - New land P sources trial, T. O'Byrne, Yalingup. 76BU4 - Old land P sources trial, T. Coombes, Busselton. 76EX37 - Young land P sources trial, F. Fels, Esperance. b) Gravel: 76MT10 - New land P sources trial, Mt. Barker Research Station. 76MT9 - Old land P sources trial, Mt. Barker Research Station. ii) Medium rainfall areas: a) Sand 75N07A -New land P sources trial, D. Gillespie, East Chittering. b) Gravel: 75N07B - New land P sources trial, D. Gillespie, East Chittering. iii) Low rainfall areas a) …

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1976 Phosphorus And Sulphur Group, J. W. Bowden, R J. Lunt, K F. Longbottom, W E. Hawkins Jan 1976

1976 Phosphorus And Sulphur Group, J. W. Bowden, R J. Lunt, K F. Longbottom, W E. Hawkins

Experimental Summaries - Plant Research

Stocking x Super. rate trials - 66M30, 62MB9, 68BR7. Crossed plot trials - residual value. P x K on Pasture - 74TS4, 74M06, 75GE6. N x P on· Wheat - 75M09. P x Species - 75LG4, 75JE5. Maintenance P x S trials - Wheat Belt Research Station - 65A1; C5, N5, 69WH15. High Rainfall Areas - 68B1, 69E6, 69AL2. Farmers residual value - 66N07, 66ME3,67N011, 66NA3, 66LG1, 68LG1, 66M06, 67M01, 67GE2, 67N05, 67N04, 66N09. Miscellaneous Cropping Trials - Super x Spacing - 76ME26, 76ES8, 9 and 10. Super Study rate and spacing - 76NA7, 76N05, 76JE8. Continuous cropping - 75LG26, …

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1976 Summary Of Results - Sowing Systems - Fallow Re-Assessment, D Tennant Jan 1976

1976 Summary Of Results - Sowing Systems - Fallow Re-Assessment, D Tennant

Experimental Summaries - Plant Research

Sowing Systems - Effect on Mineralisation of Soil Nitrogen: Locations: T. Kettle, Kendenup - 76AL32 (Clipper barley), J.& R. Erickson, Bolgart - 76MOJ2 (Gamenya wheat), M. Brown, Yillminning - 76NA41-A (Gamenya wheat), R. Koch, Boddington - 76NA41-B (Gamenya wheat), Esperance Research Station - 76E33 (Gamenya wheat). Sowing systems. Herbicide application. Results: A. 76NA41-B, B. 76AL32, c. 76MO32, D. 76NA41-A, E. 76E33. Fallow Re-assessment - 72M29.

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1976 Cereal Disease Survey - Mycosphaerella Graminum Spore Trap Studies - S. Nodorum Yield, A G. Brown Jan 1976

1976 Cereal Disease Survey - Mycosphaerella Graminum Spore Trap Studies - S. Nodorum Yield, A G. Brown

Experimental Summaries - Plant Research

1. A.G.P. Brown and T.N. Khan - Cereal disease survey. Samples were again collected from C.V.T.s by District Office staff and sent to South Perth for evaluation. A single sampling was made in 1976 at 120 days after sowing. No samples were received from Geraldton or Three Springs trials (presumably these failed to drought). Only one sample was received from Moora, none from Merredin and only one from Jerramungup. All samples from Narrogin were lost at South Perth. A number of samples were collected well after 120 days old and were senescent. 1. E. Moora. 2. Badgingarra R.S. 3. West …

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1976 Experimental Summary, D. Gillespie Jan 1976

1976 Experimental Summary, D. Gillespie

Experimental Summaries - Plant Research

1. Cultivar Evaluation in High Rainfall Areas a) Midland B/Seaton Park/Yarloop/Larisa - 72MT29 b) Trikkala evaluation trial - 76MT3 2. Pasture deterioration - high rainfall areas. Variety Daliak. Dinninup. Woogenellup. Yarloop. Mt. Barker. Nangeela. Midland B. Toodyay C. Guildford D. Jarrahdale B. Trikkala. Larisa. a) Phytotron experiments. Dinn. x (Daliak x Tood. C) (av. of 6 crosses) Dinn. x (Mid. B x Nangeela) (av. of 3 crosses Daliak x (Mid. B x Nangeela) (av. of 4 crosses) b) Field experiments - 76MA8, 76DE3. 3. Lucerne productivity and persistence - 74E3-Sheep, 74E4-Cattle, 74E3-Sheep, 74E4-Cattle, 75AL30-Cattle. 4. Effects of saline irrigation water-on …

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1976 Control Of Silverleaf Nightshade, P A. Rutherford Jan 1976

1976 Control Of Silverleaf Nightshade, P A. Rutherford

Experimental Summaries - Plant Research

75Na6 - Rates of Tordon 50-D x times. of application on Silverleaf Nightshade (Solanum elaeagnifolium). 76Na11 - Rates of three herbicides on Silverleaf Nightshade. 76Na12 - Herbicide screening trial on Silverleaf Nightshade. 76Ka5 - Rates of Wetting agent with Tordon 50-D for Silverleaf Nightshade control. 76/Ka6 - Rates of Tordon 50-D x volume of water on Silverleaf Nightshade.

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1976 Pasture Species Investigations - Wheatbelt, N. R. Mckeown Jan 1976

1976 Pasture Species Investigations - Wheatbelt, N. R. Mckeown

Experimental Summaries - Plant Research

Trials in Progress. Only four grazing trials were continued in 1976. The pasture species and management trial at Moora (68M023) required a disproportionate amount of available work time. About 6 man-months were spent in completing the fencing, repairing and modifying the water system and increasing the working efficiency of the experiment. Sheep were reintroduced to the trial early in June. This report summarizes the results from the trials under the following headings:- Seasonal Conditions; Grazing Trials;, Legume Grazing Management Trial, West Moora - 68M023; Comparison of Production from Cyprus Medic and Volunteer Pasture - 71LG17; Tornafield Medic, Serradella and Subterranean …

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1975 Weed Control Investigations In High Rainfall Areas, J M. Allen Jan 1976

1975 Weed Control Investigations In High Rainfall Areas, J M. Allen

Experimental Summaries - Plant Research

1. Docks. 2. Capeweed. Dock control - Dicamba in pastures - 73AL38, 73AR9, 73BU9. Fiddle dock control glyphosate evaluation - 74AL26, 74BU14, 74BY7, 74DE13, 74HA7. Dock control - pasture renovation - 75AL6, 75BU2, 75HA2.

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Ryegrass Control - Cultural And Chemical Systems, J. E. Holmes, G. A. Pearce Jan 1976

Ryegrass Control - Cultural And Chemical Systems, J. E. Holmes, G. A. Pearce

Experimental Summaries - Plant Research

RYEGRASS CONTROL - SPRAYTOP - SPRAY SEED + AUTUMN CULTIVATION 75M48 LOCALITY: Merredin Research Station. RYEGRASS CONTROL - SPRAYTOP - SPRAY SEED + AUTUMN- CULTIVATION 75WH67 LOCALITY: Wongan Hills RYEGRASS CONTROL - SPRAYTOP - SPRAYSEED + AUTUMN CULTIVATION 75N22 LOCALITY: Newdegate Research Station. RYEGRASS GERMINATION - EFFECT OF CULTIVATION 76Al0 LOCALITY: Avondale Research Station. RYEGRASS CONTROL - CULTURAL SYSTEMS 75A31 LOCALITY: Avondale Research Station. ANNUAL RYEGRASS CONTROL - CULTURAL SYSTEMS 75M49 LOCALITY: Merredin Research Station. RYEGRASS CONTROL - CULTURAL SYSTEMS 75E20 LOCALITY: Esperance Downs Research Station. RYEGRASS CONTROL - CULTURAL SYSTEMS 75SG16 lOCALITY: Salmon Gums Research Station. CONTROL OF RYEGBASS …

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1976 Pasture Species Investigations - High Rainfall Area, D A. Nicholas Jan 1976

1976 Pasture Species Investigations - High Rainfall Area, D A. Nicholas

Experimental Summaries - Plant Research

1. Clover cultivar grazing trial - North Bannister - 68NA1. 2. Perennial versus Annual grass grazing trial Manjimup Research Station - 72MN5. 3. Pasture types x stocking rate trial - Denmark - 72D1. 4. Clover cultivar evaluation trial - Denmark - 76D4. 5. Clover cultivar evaluation trial - Esperance - 76ES11.

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Summary Of Trial Results - 1974, N R. Mckeown Feb 1975

Summary Of Trial Results - 1974, N R. Mckeown

Experimental Summaries - Plant Research

Observations and measurements were made on 10 grazing trials and 11 small-plot legume species trials in 1974. Three of the grazing trials were under crop, two of them concluding low oestrogen species trials which had been grazed since 1969, and one of them, 68M023, West Moora, as an interval between pasture phases. The small-plot trials dated from 1970 or later and on most of them half of each plot could be grazed by sheep and half was protected. These trials have continued to supply useful information on the suitabiliy of cultivars to soil and climate and will be the subject …

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1975 Preliminary Reports - Take-All Survey - Wheat And Barley Crops, G C. Macnish Jan 1975

1975 Preliminary Reports - Take-All Survey - Wheat And Barley Crops, G C. Macnish

Experimental Summaries - Plant Research

Introduction - Surveys to determine the incidence of take-all in wheat and barley crops have been carried out for the past three seasons. Unavoidable delays in the completion of a growth room has meant that finalization of results for take-all assessments have been delayed. 75A26, 75A27, 75A28 Part I and II, 75A29, 75E18, 75M42, 75M43, 75M44, 75M45, 75N21, 75SG14, 75SG15, 75SG17, 75WH63, 75WH64.

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1975 Phosphorus And Sulphur Sources Trials, M D. Bolland Jan 1975

1975 Phosphorus And Sulphur Sources Trials, M D. Bolland

Experimental Summaries - Plant Research

1. Sulphur sources trials (a) Newdegate Gypsum Trials: Yarloop - 75YA3, Bridgetown - 75BR10, Busselton - 75BU6, Alexandria Bridge - 75BU7. (b) Gyplap - FeS04 Trial: McAlinden - 75BY4. 2. Phosphorus source trials: E. Chittering - 75NO7A E. Chittering - 75NO7B

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1975 Fallow Re-Assessment And Soil Physical Data Accumulation, D Tennant Jan 1975

1975 Fallow Re-Assessment And Soil Physical Data Accumulation, D Tennant

Experimental Summaries - Plant Research

This report summarises progress and data available for the following investigations. 1. Fallow Re-assessment - 72M29. 2. Soil Physical Data Accumulation. (a) Evaluation of methods of bulk density measurement. (b) Water holding capacities and mechanical analyses of wheatbelt soils. (c) Water holding capacities of metropolitan sands. TABLE 3 Water holding capacities (1/10 - 15 Atmosphere water contents) of metropolitan sands (mm of water). Bulk density of 1.6 assumed. 1. Medina Research Station. 2. Morley White Sand. 3. Karrakatta Sand. 4. Bassendean Sand. 5. South Perth Lawn. 6. South Perth Scrub. 7. Underwood Avenue Research Station. 8. Floreat Park Sand. 9. …

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1975 Control Of Silverleaf Nightshade And Saffron Thistle, P A. Rutherford Jan 1975

1975 Control Of Silverleaf Nightshade And Saffron Thistle, P A. Rutherford

Experimental Summaries - Plant Research

75NA6 - Rates of Tordon 50-D x times of application on Silverleaf Nightshade (Solanum elaeagnifolium) 75Na7 - Herbicide screening trial on Silverleaf Nightshade. 75Es25 Saffron thistle control in wheat. 75Es26 Saffron thistle control in pastures. 75Es25 Property - G. Graham, Circle Valley. 75Es26 Property - G. Graham, Circle Valley.

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1974 Field Experiments On Legume Seed Inoculation, D. L. Chatel Jan 1975

1974 Field Experiments On Legume Seed Inoculation, D. L. Chatel

Experimental Summaries - Plant Research

The response of sweet lupins to inoculation in Western Australia Before proceeding with details of the six lupin inoculation experiments conducted in 1974 the following comments are presented as a brief summary of the work so far done on lupin inoculation. Thirty nine inoculation experiments with sweet lupins (mainly Lupinus angustifolius var. Uniwhite, Uniharvest and Unicrop have been conducted in South-Western Australia since 1970. They have been drill-sown under farmer conditions and they have been aimed at finding where it is necessary to inoculate and the best method of inoculating seed. Of the 39 trials, 36 gave better nodulation following …

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1975 Nitrogenous Fertilisers For Cereals - Trials With Wheat, Oats And Barley, M. G. Mason Jan 1975

1975 Nitrogenous Fertilisers For Cereals - Trials With Wheat, Oats And Barley, M. G. Mason

Experimental Summaries - Plant Research

Rates of nitrogen on wheat - soil test - Fifty-one sites were selected and soil sampled during February- March. All these proposed trials consisted of four replications and these reps were soil sampled separately. In each rep. 20 samples were taken to 10cm depth with pogo stick samplers. In addition, from three holes at random across each trial bulk samples were obtained from the 0-15, 15-30 and 30-45 cm soil intervals These soil samples were air dried (if not already dry) and sieved to remove > 2 mm fraction (gravel). Portions of these < 2mm fractions from the 0-10cm samples were sent to the Government Chemical Laboratories and to C.S.B.P. & Farmers Ltd. At C.S.B.P. analyses were carried out to determine P and K content and the C.S.B.P. soil nitrogen test was also carried out on them. This measures nitrate content before and after incubation with moist soil at 32c for seven days. A measurement was also made after 14 days. At Government Chemical Laboratories analyses were to be carried for Organic carbon and for a number of nitrogen fractions, including Total Nitrogen, MH4 + NO3 Nitrogen and several incubation techniques. These were also to be determined on the profile samples, which were also to be subject to the following analyses: a) Mechanical Analysis b) pH (in water) c) Cation Exchange Capacity d) Moisture Holding Capacity All of these trials were planted except for one at Jerramungup, where the marker pegs were ploughed out by the farmer. Vegetative cuts were then taken during the August - September period on 46 of the remaining 50 sites. Three of the other four sites were abandoned because of severe waterlogging (Neridup), extreme weediness (Nugadong) or due to poor plant survival (possibly due to webworm) combined with weeds (Mallalying). The trial at Wannamal was sown to oats, by the farmer. The nitrogen treatments were still applied and the trial was retained but not sampled for dry matter production. These samples were to be analysed for nitrogen content. Dry matter production and grain yields are set out in the following tables. 61M11, 75A1. 75A2, 75A3, 75AL1, 75AL2, 75BA2, 75BA3, 75BR1, 75BR2, 75C1, 75C2, 75C3, 75E2, 75E3, 75ES1, 75ES2, 75ES4, 75GE1, 75GE2, 75GE3, 75JE1, 5JE2, 75KA1, 75KA2, 75LG1, 75LG2, 75LG3, 75M2, 75M3,75M4, 75ME1, 75ME2, 75ME3, 75MO1, 75MO2, 75MO4, 75MT2, 75MT3, 75N1, 75N2, 75N3, 75NA1, 75NA3. 75NA4, 75NO2, 75NO3, 75SG1, 75SG2, 75TS2, 75TS3, 75TS4, 75WH4, 75WH5, 75WH6, 75WH7.

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Summary Of Trial Results - 1975, N. R. Mckeown Jan 1975

Summary Of Trial Results - 1975, N. R. Mckeown

Experimental Summaries - Plant Research

1. From September 1971 to late August 1974 there was a mean reduction of legume content in the medic pastures from 40 per cent to 22.0 per cent but the reduction at 7.4 sh/ha was to 31 per cent. The drop in woolly clover content on the volunteer pastures was closely similar. 2. In 1972, at 7.4 sheep/ha a difference in body weight of 7-9 kg rapidly developed in favour of sheep grazing barrel medic compared with sheep on volunteer pasture. This difference was maintained consistently throughout the trial. At lower stocking rates the differences were smaller and less consistent. …

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Evaluation Of The Systemic Nematicide Phenamiphos To Control The Nematode Anguina Sp In Toxic Ryegrass Pasture, B A. Stynes Jan 1975

Evaluation Of The Systemic Nematicide Phenamiphos To Control The Nematode Anguina Sp In Toxic Ryegrass Pasture, B A. Stynes

Experimental Summaries - Plant Research

Field trials done in 1974 showed that phenamiphos could be used to control Anguina sp. and suggested that low rates may be effective with critical timing of applications. These possibilities were investigated in 1975. Locality - Katanning - F. Quartermaine and c. Butterworth. Gnowangerup - J. Griffith. Tables 1 and 2 show the absolute levels of nematodes in ryegrass seed and the density of nematodes per unit area of pasture after treatment with phenamiphos. All rates of nematicide reduced the level and density of nematodes; the highest rate being slightly more effective. The spray schedule including sprays in July and …

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Summary Of 1974 Weed Control In Lupin Evaluations, J. G. Allen Jan 1975

Summary Of 1974 Weed Control In Lupin Evaluations, J. G. Allen

Experimental Summaries - Plant Research

Lupin Trials 1974 1. Herbicides x Depth of Seeding - There is no evidence of a herbicide x depth of seeding interaction in lupin plant numbers, at either Broomehill or Eradu. The lupin plants on the shallow sown plots were reported to be more effected by herbicides than on the deeper sown plots at Eradu. It is suggested that shallow seeding may be a factor in predisposing lupin crops to simazine damage particularly on sandy soils, however it has not been possible to demonstrate such on effect. 2. Herbicides x Time of Seeding - At two sites (Myrup, Namban) there …

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1975 Soil Fertility - Grain Lupins - Long Term Rotation Trials, Ian Rowland Jan 1975

1975 Soil Fertility - Grain Lupins - Long Term Rotation Trials, Ian Rowland

Experimental Summaries - Plant Research

Soil Fertility - Grain Lupins 75A4, 75BA6, 75E4, 75GE9, 75JE9, 75MT6, 75N028, 75WH9. Long Term. Rotation Trials W56H, 66M29, 67Cl3, 67N4, 68E5, 68SG5, 69GE20, 73SG16. Soil Fertility - Grain Lupins Use of the stage 4 lupin variety trials to assess the effect of a year of sweet grain lupins on a following cereal crop was continued. The 1974 variety trials contained a number of lupin varieties randomised with two standard wheat varieties. Also at two times of planting. Eight trials were selected: 74GE26 at Morawa, 74BA7 at Badgingarra, 74WH8 at Wongan Hills, 74N08 at Bolgart, 74A8 at Beverley, 74MT8 at …

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1975 Wild Oat Genotype X Environment Interaction, J Patterson Jan 1975

1975 Wild Oat Genotype X Environment Interaction, J Patterson

Experimental Summaries - Plant Research

To investigate the interrelationships between wild oat (Avena sativa; fatua form) genotypes, herbicide treatment and time of application. Method: Split plot glasshouse (Forrestfield) experiment Reps (3) - plus three internal reps. Genotypes (5) - selected from north to south of southwest Western Australia Herbicides (4) - Avenge, S29761, Neoban, Water (Control) Times (6) - Average of 1 to 6 leaf stage Main plots were times and herbicides. Results: The following parameters were measured. .Growth stage at each time of application (number of leaves) .Height at each time of application .Date of full head emergence .Dry weight at full head emergence …

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1975 Trials On Doublegee, D J. Gilbey Jan 1975

1975 Trials On Doublegee, D J. Gilbey

Experimental Summaries - Plant Research

75A16, 75A17, 75C13, 75MO36, 75MO37, 75WH21, 75WH22. Biological control of doublegee.

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1975 Weed Trials - Annual Ryegrass, Spray Top, Broadleaved Weeds In Cereals, Wild Oats, G. A. Pearce Jan 1975

1975 Weed Trials - Annual Ryegrass, Spray Top, Broadleaved Weeds In Cereals, Wild Oats, G. A. Pearce

Experimental Summaries - Plant Research

Ryegrass in cereals - 75A24, 75E16, 75G16, 75LG5, 75N19, 75NO32. Spray top annual ryegrass trial - Locality - Wongan Hills, Merredin Research Station Avondale Research Station, Newdegate Research Station. Background - Killing of immature seed by killing seedhead with paraquat is a method of reducing seed production in annual ryegrass. Method Various rates of 'Spray top' were applied to an even stand of ryegrass. Seed counts were made in December 1975 and will be made in March 1976. Plant counts after emergence will be made as well. Counts were partitioned into seed in head and seed shed. Herbicide control of …

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1975 Lupin Diseases, P M. Wood Jan 1975

1975 Lupin Diseases, P M. Wood

Experimental Summaries - Plant Research

Sclerotinia stem rot, a fungal disease, is becoming increasingly important. This disease can attack the stem at any point from the stem base to the first laterals. Lodging can result if the canker is severe enough. Superficial cankers can disrupt sap flow resulting in poorly filled pods. The fungicide Benlate is used overseas to control Sclerotinia in bean plantings, Accordingly, a fungicide trial was planned to estimate yield losses resulting from Sclerotinia infection. A secondary aim was to examine any yield response which could be attributed to reported growth promoting properties of benomyl - 75MT33. Brown spot of lupins - …

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1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel Jan 1975

1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel

Experimental Summaries - Plant Research

(January 1976) LIST OF EXPERIMENTS 1. The effect of cobalt and seed inoculation on Unicrop lupins. GREEN RANGE 2. The effect of cobalt and seed inoculation on Unicrop lupins. BRAMLEY RESEARCH STATION 3. The effect of cobalt and seed inoculation on Unicrop lupins. McALINDEN 4. The effect; of cobalt and seed inoculation on Unicrop lupins. CHOWERUP 5. The effect of cobalt and seed inoculation on Unicrop lupins. ALANO OKA 6. The effect of cobalt and seed inoculation on Unicrop lupins. LANCELIN 7. The effect of inoculation on Uni crop lupins. KATANNING 8. The effect of inoculation on Uni crop lupins. …

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1975 Experimental Programme With Lupins, G H. Walton Jan 1975

1975 Experimental Programme With Lupins, G H. Walton

Experimental Summaries - Plant Research

74MO10 - Pasture establishment under a lupin orop (Wheat crqp 1975). 75AL3 - 6 Time x 3 Rates x 2 Varieties x 2 Herbicide Factorial. 75B3 - Lupin Agronomy in High Rainfall Area. 75BA4 - Early planting of Unicrop lupin. 75GE4 - Polyculture of Wheat and Lupin. 75GE5 - Rate of seeding Unicrop - low rainfall site. 75JE4 - Time of planting x rate of seeding lupins. 74MO10 - Pasture establishment under a lupin crop (Wheat crop 1975). 75MO6 - Time of planting x rate of seeding with L. albus cv WB2. 75MO7 - Pasture establishment under lupin crops. 75MO12 …

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Time And Rate, Comparative Fungicide, Fungicide Application Method Trial, Clover Scorch Economy Demonstrations, A Bokor Jan 1975

Time And Rate, Comparative Fungicide, Fungicide Application Method Trial, Clover Scorch Economy Demonstrations, A Bokor

Experimental Summaries - Plant Research

Time and Rate Trial 75AL33 Comparative Fungicide Trial 75AL34. Fungicide Application Method Trial 75D8. Clover Scorch Economy Demonstrations 75AL35.

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1975 Field Experiments And Cereal Disease Surveys, A. G. P. Brown Jan 1975

1975 Field Experiments And Cereal Disease Surveys, A. G. P. Brown

Experimental Summaries - Plant Research

1. Septoria disease of wheat - 75BA17. 2. Fungicide seed dressing on lupins 3. Cereal Disease survey - Table 7 - Zone l. Beverley R.S. B3 2. Badgingarra A2 3. Chapman Bl 4. Gibson A5 5. Merredin C3 6. Mt Barker A5 7. Newdegate B4 8. Salmon Gums C5 9. Wongan Hills B2 10. Woodgenellup A5 11. Chowerup A5 12. Neradup A5 13. W. Grass Patch B5 14. E. Salmon Gums C5 15. Mellewa Cl 16. Yuna Cl 17. N. Mingenew Bl 18. Mingenew Bl 19. Gairdner River A5 20. Jerramungup B5 21. Ravensthorpe B5 22. N. Kojonup A4 23. …

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1975 Weed Control In Lupin Investigations, J M. Allen Jan 1975

1975 Weed Control In Lupin Investigations, J M. Allen

Experimental Summaries - Plant Research

1. The results with pre emergence herbicides confirm previous recommendations of simazine 1.25 kg/ha on heavy soil and diuron 1.25 kg/ha on light soils with the following modification. a) Simazine rates need to be increased to 3 kg/ha on very early (April) sovm crops in southern areas. b) Simazine has not damaged lupins in southern areas and where ryegrass is a major problem on sandy soils (i.e. Esperance) it is likely to give better responses than diuron. 2. As suspected in previous years simazine can by way of effective weed control produce a marked lupin vegetative response without any increase …

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