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sealed silo

Catalogue: GRDC YouTube channel
And not helping them in their attempt to ensure grain quality has been the lack of an Australian standard for sealed silos... In early 2010 a manufacturing standard was specified it is a voluntary standard leaving it up to growers to make sure when they buy "air tight" that's what they get... Technology to reduce spray drift GCTV: Drift Reducing Technology..
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Catalogue: GRDC Media
Grain storage specialist Peter Botta says those considering buying a new silo should know about the standard... Mr Botta says the reasons for ensuring grain storage silos are gas tight are manifold... Once you pressurise the silo, Mr Botta says you should time the half-life...
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Catalogue: GRDC Updates
The work was initiated because of the ease with which grain insects became resistant to protectants and also because high levels of resistance to phosphine had been reported from India and Bangladesh... , some level of resistance had already been detected in insects from Australia... The method used has been to collect samples of insects from farms, central storages and grain merchant premises...
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Catalogue: Ground Cover
Used in Australia for the last 45 years, phosphine is low-cost and, when used properly, leaves no residues and kills insects effectively... Unfortunately there is widespread improper use, with many growers using phosphine in unsealed silos... Using phosphine in unsealed storages exposes large numbers of insects to closes tbat kill susceptible insects but allow resistant insects to survive and multiply...
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Catalogue: Ground Cover
Used in Australia for the last 45 years, phosphine is low-cost and, when used properly, leaves no residues and kills insects effectively... Unfortunately there is widespread improper use, with many growers using phosphine in unsealed silos... Using phosphine in unsealed storages exposes large numbers of insects to closes tbat kill susceptible insects but allow resistant insects to survive and multiply...
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Catalogue: GRDC Final Reports
In one trial, for example, head-space temperatures measured during the day were as high as 61 C. Gases expand as they are heated so the possible effects of diurnal heating and cooling of the head-space on phosphine leakage from the silo and phosphine distribution within the grain mass need investigation... Silos containing grain were pressure tested to give an indication of gas-tightness measured as the pressure halving time (P1/2)... In the project, phosphine concentrations were measured during storage mainly along the vertical mid-axis of the silo, but sometimes at other locations...
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Catalogue: GRDC Factsheets
Pressure testing a silo ensures it can hold gas concentrations sufficient to kill all insects at all life stages... If the silo has a slide plate outlet that has been tested empty, retest when full to make sure the pressure of the grain doesn't compromise the seal... Common places for leaks are: bottom outlet, aeration inlet seal, damaged lids (caused by the auger when lining it up to fill the silo), stretched springs on latches, between the bottom cone or base and the silo wall joint, the roof and wall joint and where the lid ring joins the roof...
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Catalogue: Ground Cover
Sealed silos hold fumigation key.. The questions then are whether these concentrations of gas can be achieved in on-farm grain storage silos, and what standard of seal is needed for silos to hold the gas concentration for the required number of days to achieve an effective kill against all stages of the insect pest life cycle - the adult, eggs, larvae and pupae... Farm silo fumigation trials conducted between 2002 and 2005 in Queensland, NSW and WA had already provided vital data concerning the behaviour of phosphine gas in silos and demonstrated how to achieve an effective fumigation result (GRDC-funded DAQ00010, project leader Greg Daglish of the Queensland Department of Primary Industries and Fisheries, Indooroopilly)...
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Catalogue: GRDC Media
Mr Botta says the reasons for ensuring grain storage silos are gas tight are manifold... "Growers should also pressure test the silo once it is filled with grain... Once you pressurise the silo, Mr Botta says you should time the half-life...
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Catalogue: GRDC Factsheets
Pressure testing a silo ensures it can hold gas concentrations sufficient to kill all insects at all life stages... If the silo has a slide plate outlet that has been tested empty, retest when full to make sure the pressure of the grain doesn't compromise the seal... Common places for leaks are: bottom outlet, aeration inlet seal, damaged lids (caused by the auger when lining it up to fill the silo), stretched springs on latches, between the bottom cone or base and the silo wall joint, the roof and wall joint and where the lid ring joins the roof...
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