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GRDC Factsheets

GRDC Factsheets. These are produced from GRDC funded research.

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Key poinTs A single gene mutation in populations of the powdery mildew pathogen has caused disease control failure by some triazole fungicides... P H O T O : K i T H S i r i J A y A S e n A Use integrated disease management to reduce disease pressure and reliance on fungicides... Apply effective fungicides as soon as the disease becomes apparent; early control is essential to maximise fungicide efficacy...
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Growers in high rainfall zones should be proactive and develop a Barley Yellow Dwarf Virus (BYDV) management plan which includes crop monitoring, green bridge management, foliar pesticide sprays and pre-sowing seed treatment... Trial results have found that the oat and rose grain aphid are found on wheat and barley and the corn aphid favours barley and is rarely found on wheat... Even where there have been large yield losses due to BYDV, trial results have not shown any difference in protein content between sprayed and untreated plots...
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TAKe THe TeST fOr HerBiCide reSiSTAnCe.. Syngenta offers a riSQ (resistance in-Season Quick) test for resistance to AXiAL , TOPiK and Select (Group A), Crusader (Group B) and glyphosate (Group M) herbicides in ryegrass and wild oats... Weed Seed Wizard can investigate the impact of a wide range of management strategies (such as grazing, harvest seed control, increased crop competition, rotation change and various seed set controls such as crop topping and hay making) on the seed and weed numbers of annual ryegrass, wild radish, wild oats, barley grass and brome grass...
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Managing weeds with the seeds - it starts.. Rotating herbicide mode of action groups and reducing reliance on herbicide control by the use of physical and biological control techniques will help slow the development of herbicide resistance... Crop-topping This the most common method of in-crop weed control resulting in the prevention of weed seed-set...
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if a product has 'curative' properties, often the best result will be achieved by ensuring sprays not only reach the plant parts requiring protection (such as new growth), but also the source of the infection (which may be on lower parts of the plant)... Ways of maintaining spray quality include: using nozzles that produce the same spray quality throughout their pressure range; using systems that maintain droplet size, such as pulse width modulation (for example, the aim command system); and using controller functions such as the minimum hold or lower limit to prevent excessive pressure dr...
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tolerate grazing and can recover to produce a grain or hay crop; provide forage to fill the winter feed gap in the livestock cycle; and facilitate grazing as a canopy management tool... Dual-purpose crops are increasingly being used in the high rainfall zones (HRZs) of south-eastern Australia to provide additional winter forage, and there is growing interest in sowing dual-purpose varieties in the drier regions of southern and western Australia... a late application of nitrogen can help to optimise grain yields...
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Safety is a three-step process - identify hazards, assess risk and address the hazard... Most lids still require a climb to the top of the silo to inspect rubber seals and latch the lid before the silo will meet a half-life pressure test, required for effective fumigation... Safe and sound on the ground: Ground-operated lids reduce the number of times a silo has to be climbed, but most situations require a climb to secure the lid for effective fumigation...
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The checklist will help you get an appreciation of your current level of understanding of farm business management and identify areas you may want to focus on... There are references to recent GRDC Farm Business Management Fact Sheets to provide you with suggestions and guidance on improving your farm business management skills... 1. Strategy - setting direction and overseeing your business...
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Applying P at depth (15 to 20cm deep on 50cm bands) can improve yields over a number of cropping seasons (if other nutrients are not limiting)... Limited P is now constraining yields in parts of the northern grains region, particularly in the vertosols (black and grey cracking clays)... The test needs to be done only every four to six years, and is most important in the subsoil layers...
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NortherN, SoutherN aNd WeSterN regioNS BeTTer ferTiLiSer deCiSiOnS fOr CrOP nuTriTiOn Inefficient or incorrect use of fertiliser can be a substantial, but somewhat hidden, cost in the cropping operation... KEY poiNtS fertilisers are a major cost of growing a crop... An initial soil test that includes both N and organic matter can provide a better understanding of potential N needs throughout the season...

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