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resistant strain

Catalogue: Ground Cover
The Chinese, according to QDPI entoentomologist Manoj Nayak, have been using phosphine intensively for much longer than we have in Australia, and they have grain storage insect pests that show greater levels of phosphine resistance than any Australian grain storage pest... The work specifically compared resistance levels detected in the rice weevil, Sitophilus oryzae , and two psocid pests, Liposcelis entomophila and L. decolor , from Australia with respective resistant strains from China... The work showed that the time to population extinction of the Chinese strain of S. oryzae was four days and two days at phosphine concentrations of 200 and 700 ppm, compared with the resistant Australian strain ( see table )...
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Catalogue: Ground Cover
The Chinese, according to QDPI entoentomologist Manoj Nayak, have been using phosphine intensively for much longer than we have in Australia, and they have grain storage insect pests that show greater levels of phosphine resistance than any Australian grain storage pest... The work specifically compared resistance levels detected in the rice weevil, Sitophilus oryzae , and two psocid pests, Liposcelis entomophila and L. decolor , from Australia with respective resistant strains from China... The work showed that the time to population extinction of the Chinese strain of S. oryzae was four days and two days at phosphine concentrations of 200 and 700 ppm, compared with the resistant Australian strain ( see table )...
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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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