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insecticide resistance

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Catalogue: GRDC Media
Mr McMaster says growers should practice good broadleaf weed control in and around crop areas as SLW has a very wide host range and can rapidly develop resistance to insecticides. ".. Queensland Department of Primary Industries and Fisheries (QDPI&F) entomologists have visited the area and also report cotton fields around St George are at or reaching high densities of SLW. QDPI&F graduate entomologist Zara Ludgate says the whitefly present in the.. Greenhouse whitefly (GHW) and East Australian native whitefly have been common in the past but are easy to control compared with SLW. "It is thought that increased host plant availability from a wet winter/spring, warm conditions and a decline in natural enemies due to the use of broad spectrum insecticides has contributed to the high SLW numbers," Ms Ludgate said...
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Catalogue: GRDC Media
Mr McMaster says growers should practice good broadleaf weed control in and around crop areas as SLW has a very wide host range and can rapidly develop resistance to insecticides. ".. Queensland Department of Primary Industries and Fisheries (QDPI&F) entomologists have visited the area and also report cotton fields around St George are at or reaching high densities of SLW. QDPI&F graduate entomologist Zara Ludgate says the whitefly present in the.. Greenhouse whitefly (GHW) and East Australian native whitefly have been common in the past but are easy to control compared with SLW. "It is thought that increased host plant availability from a wet winter/spring, warm conditions and a decline in natural enemies due to the use of broad spectrum insecticides has contributed to the high SLW numbers," Ms Ludgate said...
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Catalogue: GRDC Media
A new testing service is being offered to grain growers and advisers to determine the presence of insecticide resistance in green peach aphid (GPA) populations... The service is being made available through cesar with the support of the Grains Research and Development Corporation (GRDC) to assist growers in choosing the most effective product for controlling GPA... Anthony van Rooyen, of cesar, says resistance in GPA has escalated as a result of heavy reliance on insecticides...
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Catalogue: GRDC Media
A new testing service is being offered to grain growers and advisers to determine the presence of insecticide resistance in green peach aphid (GPA) populations... The service is being made available through cesar with the support of the Grains Research and Development Corporation (GRDC) to assist growers in choosing the most effective product for controlling GPA... Anthony van Rooyen, of cesar, says resistance in GPA has escalated as a result of heavy reliance on insecticides...
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Catalogue: GRDC Final Reports
Three accessions of Medicago truncatula were identified showing different degrees of resistance to Therioaphis trifolii through three resistance modalities... The objectives of the project were to identify the genetic basis and to decipher the defence mechanisms of resistance to T. trifolii in M. truncatula ... The results of the research will provide valuable resources to determine the molecular basis of plant recognition and signalling in response to aphid feeding, and will also be important in identifying key factors involved in aphid virulence and host resistance...
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Catalogue: Ground Cover
Recent GRDC-funded research has uncovered widespread resistance among green peach aphid populations to pirimicarb, synthetic pyrethroids and organophosphates in Victoria, South Australia, New South Wales, Queensland and Western Australia... Department of Agriculture and Food, WA (DAFWA), PestFax coordinator Peter Mangano says grain growers have experienced significant issues with resistance in green peach aphid this season... Dr Umina says: "If we discover that individual aphids have resistance to organophosphates, synthetic pyrethroids and carbamates, it will mean the likely reproduction of fully resistant offspring, as green peach aphids can reproduce asexually to produce clones of themselves...
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Catalogue: GRDC Final Reports
All aphids were moderately to highly resistant to organophosphate (OP) insecticides, while approximately half of aphids tested were at least partially resistant to pyrethroids... Preliminary data has shown that a 20 metre (m) border spray on the crop edge is sufficient to prevent most aphids released adjacent to a wheat crop from successfully colonising the crop... The 2001 and 2002 populations have been evaluated for insecticide resistance against two insecticides: dimethoate # (OP) and alpha-cypermethrin # (SP)...
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Catalogue: GRDC Factsheets
Green peach aphid has developed resistance to more insecticides than any other insect species... neonicotinoids are also quite commonly applied to a variety of Australian vegetable crops and are becoming widespread in grains crops as a seed dressing... The most recent survey funded through the gRdC, conducted in 2013, has found widespread and high levels of resistance to carbamates (pirimicarb) and synthetic pyrethroids (alpha-cypemethrin) across Australia...
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Catalogue: GRDC Factsheets
Green peach aphid has developed resistance to more insecticides than any other insect species... neonicotinoids are also quite commonly applied to a variety of Australian vegetable crops and are becoming widespread in grains crops as a seed dressing... The most recent survey funded through the gRdC, conducted in 2013, has found widespread and high levels of resistance to carbamates (pirimicarb) and synthetic pyrethroids (alpha-cypemethrin) across Australia...
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Catalogue: GRDC Media
Beet western yellows virus, spread by green peach aphids, has severely damaged canola crops in parts of the southern region.. "The experts agree that growers should give serious consideration as to whether spraying to control GPA while winter conditions persist in the southern cropping region is warranted," Dr Taylor said... Studies funded by the GRDC have found that the extent of insecticide resistance in GPA across Australia has escalated as a result of heavy reliance on insecticides to manage aphid populations, placing strong selection pressure on the insect to develop resistance and leaving growers with limited future control options...
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