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Catalogue: GRDC Media
Dates for SA Updates.. The Grains Research and Development Corporation (GRDC) has announced dates and locations for its 2014 grains research Updates for growers in South Australia... An important source of agronomic and industry information and resources for growers, the Updates will be held at Crystal Brook on February 27; Waikerie on August 13; Cummins on August 20; Minnipa on August 21; and Naracoorte on August 27...
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Catalogue: GRDC Updates
To prevent ascochyta infection, a first Bravo at 1.5 L/ha (chlorothalonil) spray was applied on 14 July and the following 3 applications were done at 3 week intervals... Pre-emergent metribuzin application at 210 g a.i/ha caused no significant yield reduction in all the three chickpea varieties (Table 2), confirming that 210 g a.i/ha metribuzin was safe to use as pre-emergent on these chickpea varieties... The Kabuli chickpea line IG 96220 registered no significant grain yield loss when metribuzin applied post-emergent at rates from 56 to 225 g/ha whilst the standard variety Moti suffered 35% grain yield loss at 225 g a.i/ha rate (Table 2)...
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Catalogue: GRDC Updates
The structure of roots is a consequence of their primary functions- growing through an abrasive medium (the soil), acting as plumbing to absorb and transport water to the shoot, and actively and selectively absorbing essential nutrients such as mineral N (nitrate and ammonium), inorganic P and K. the structure of leaves is designed to absorb radiation for photosynthesis, regulate evaporative losses of water, act as a sink for nutrients and water transported from the root system, and produce carbohydrates from photosynthesis... The root surface comprises a layer of epidermal ('skin') cells (some with extensions or 'root hairs') that absorb water through their cell walls and cell membranes and which have specific sites where nutrient forms such as nitrate, ammonium, phosphate and potassium are bound onto 'carrier' molecules and transported across the cell membrane into the interior of the cell... Any so-called microbial activators or mineral-solubilising microorganisms are operating in a hostile environment full of competitors...
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Catalogue: GRDC Updates
After 7 days, snails were retrieved and assessed for mortality... The pre- and post-treatment numbers of live and dead snails were estimated by collecting all snails in four 0.25 sq... It should be noted that this trial was assessed after only 7 days, so these results do not take into account potential differences in the persistence of different bait products beyond this period...
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Catalogue: GRDC Updates
Experiments in both dryland and irrigated experiments show very flat responses in terms of the addition of nitrogen and its resulting impact on biomass (see Table 1)... The experiment also illustrates the capacity of the narrow row spacing to produce significantly higher numbers of both tillers and spikes, when early season conditions in terms of soil moisture and nitrogen are available (see Table 3).. We conducted experiments in the 2010 season looking at ways of being able to manipulate the plants capability to produce tillers and grain bearing spikes using the agronomic tools of nitrogen, water, planting date and row spacing...
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Catalogue: GRDC Updates
Background Wheat streak mosaic virus (WSMV) is a sap-borne viral disease transmitted by the wheat curl mite (WCM)... Seed-borne transmission does not appear to be a factor in the spread of WSMV within two of these paddocks... Seed transmission is potentially an important factor in introducing WSMV into new locations but its importance in initiating an epidemic of WSMV remains unclear...
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