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phosphine

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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
Research trials at the Murdoch University laboratory are using radioactively labelled phosphine ( 32 P) to study how grains absorb phosphine and the speed at which the residues disperse... Increasing levels of resistance in insects is resulting in higher levels of phosphine being used, and for longer periods, to ensure all insects are killed, particularly for grain that is exported... "It is extremely important that the Australian grain industry has information on the fate of phosphine in grains to prevent breaches of MRLs, which could jeopardise access to international markets."..
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Catalogue: Ground Cover
Network project builds strategies to prolong phosphine.. By Catherine Norwood A recent two-year review has identified several strategies for limiting the development of insect resistance to phosphine... Understanding the problems caused by incorrect use of chemicals to control grain storage insects, ensuring that new silo purchases meet the new Australian standard for gas-tight structures, cleaning harvesters and storage structures and, if you're a grain buyer, asking for chemical use history on grain consignments will go a long way to maintaining the use of phosphine for the whole industry."..
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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: Broadacre Field Crops DAFF QLD
The images in the gallery relate to resistance of insects to phosphine and protectant insecticides in stored grain... A map of Australia showing areas of strong resistance to phosphine.. A figure showing weevils in stored grain in unsealed silos, and the treatment by phosphine fumigation...
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Catalogue: Broadacre Field Crops DAFF QLD
The images in the gallery relate to resistance of insects to phosphine and protectant insecticides in stored grain... A map of Australia showing areas of strong resistance to phosphine.. A figure showing weevils in stored grain in unsealed silos, and the treatment by phosphine fumigation...
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Catalogue: Broadacre Field Crops DAFF QLD
The images in the gallery relate to resistance of insects to phosphine and protectant insecticides in stored grain... A map of Australia showing areas of strong resistance to phosphine.. A figure showing weevils in stored grain in unsealed silos, and the treatment by phosphine fumigation...
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Catalogue: GRDC Final Reports
An industry workshop was held to determine the demand for a national strategy for phosphine # resistance and to define a mechanism to establish such a strategy... The workshop demonstrated there is a demand for a national strategy for managing phosphine # resistance... There is an ongoing need for monitoring as well as the development of rapid and sensitive diagnostic tools...
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Catalogue: Broadacre Field Crops DAFF QLD
Grain storage entomologists are closely monitoring resistance of insects to the fumigant phosphine and are advising growers and grain handlers to review their control practices... The frequency of resistance of grain insects to phosphine fumigant has steadily increased in all species since the mid-1990s... Scientists lead a national resistance monitoring program which provides information on the presence of and trends in resistance to phosphine and assists grain handlers by providing information on managing resistance and control options...
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Catalogue: Broadacre Field Crops DAFF QLD
Grain storage entomologists are closely monitoring resistance of insects to the fumigant phosphine and are advising growers and grain handlers to review their control practices... The frequency of resistance of grain insects to phosphine fumigant has steadily increased in all species since the mid-1990s... Scientists lead a national resistance monitoring program which provides information on the presence of and trends in resistance to phosphine and assists grain handlers by providing information on managing resistance and control options...
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