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strong resistance

Catalogue: GRDC Media
The application of commonly recommended management principles has eradicated a strain of grain storage insects with strong phosphine resistance, located on a Western Australian farm... It is believed to be the first time that elimination of on-farm grain storage insects with strong phosphine resistance has been scientifically documented and confirmed in Australia and possibly the world... Mr Newman said the case of strong resistance was one of only a handful which had developed in WA within the last five years...
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Catalogue: Ground Cover
Rusty grain beetle tests storage defences.. Overall, the picture of genetic resistance that has surfaced from the program - run through the Queensland Department of Agriculture, Fisheries and Forestry (DAFF), the New South Wales Department of Primary Industries (DPI) and the Department of Agriculture and Food, Western Australia (DAFWA) - is a sobering one... Overall, strong phosphine resistance is still relatively rare in Australia's stored grain pests...
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Catalogue: Ground Cover
Rusty grain beetle tests storage defences.. Overall, the picture of genetic resistance that has surfaced from the program - run through the Queensland Department of Agriculture, Fisheries and Forestry (DAFF), the New South Wales Department of Primary Industries (DPI) and the Department of Agriculture and Food, Western Australia (DAFWA) - is a sobering one... Overall, strong phosphine resistance is still relatively rare in Australia's stored grain pests...
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Catalogue: Ground Cover
From minor pest to high-risk species, strong resistance to phosphine has propelled the rusty grain beetle to the top of the stored grain research priorities.. Researcher Dr Manoj Nayak says that under the current label rates, phosphine applied at 720 parts per million, at 25 C, will kill all other species of strongly resistant stored-grain insects within eight days... Dr Daglish says the newly developed lures were used to trap beetles in a trial in Queensland, and the insects were then raised in optimal conditions to test their longevity...
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Catalogue: Ground Cover
From minor pest to high-risk species, strong resistance to phosphine has propelled the rusty grain beetle to the top of the stored grain research priorities.. Researcher Dr Manoj Nayak says that under the current label rates, phosphine applied at 720 parts per million, at 25 C, will kill all other species of strongly resistant stored-grain insects within eight days... Dr Daglish says the newly developed lures were used to trap beetles in a trial in Queensland, and the insects were then raised in optimal conditions to test their longevity...
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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: GRDC Final Reports
In the current project, control protocols were developed for a Chinese rice weevil strain which is more resistant to phosphine than any Australian strains... Results from fumigation at different concentrations of phosphine confirmed the presence of a very high level of resistance in Chinese rice weevils... Results confirmed the presence of a very high level of resistance in this Chinese strain, even after five years without exposure to phosphine...
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Catalogue: GRDC Final Reports
Australia is well placed to meet this demand through its extensive use of fumigation, sealed storages and flow-through systems, both on-farm and in the central handling system... One of the key economic outcomes of this research is to prolong the life of phosphine on which Western Australia is so reliant avoiding the enormous extra cost of alternative technologies... There was a previous report on the finding of high resistance in a sample collected in a vacuum cleaner bag from Oman and Tribolium castaneum from southern China in polished rice...
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Catalogue: GRDC Final Reports
The expected outcomes of this project were detailed in the project specification document: "Early warning of the emergence of new resistance and spread of known resistance... Once resistance was detected and we had confirmed that its potential impact on the grain industry would be significant we initiated an extensive program to establish fumigation protocols to combat it... Our survey has shown that resistance is common in L. bostrychophila and occurs in the other two species (Table 6)...
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Catalogue: GRDC YouTube channel
For more than 40 years Phosphine has been a safe and reliable means of controlling grain storage insects... 210.62: Chris Newman: 213.189: at the situation on this particular farm, Michelle had 216.86: already indicated that it was starting to look very interesting and so I first went 222.829: up to the farm and assessed the situation, discovered what the 228.11: fumigation practice was; looked at the silos; looked 230.75: at the hygiene around the farm and decided that it was possible that we could do an eradication 237.15: of the insects on the farm... And so I put an environmental trap under the 282.43: silos which was essentially a large rubbish bin full of 285.19: grain and sieved the insects out of that on a regular basis and submitted them to the 290.47: labs for Michelle to test and found that there was 294.05: no strong resistance left in the insects that were flying 297.62: into the farm...
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