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Vip3A resistance already raised in Australia

A study from the Australian research organisation, the CSIRO, has found that resistance to the Bt Vip3A toxin, in Syngenta’s MIR162 and COT102 events, already exists in some target insect populations prior to the release of genetically modified crops expressing the insecticidal protein in Australia. The researchers found that almost 3% of native cotton bollworms ( Helicoverpa armigera) and just under 1% of Australian bollworms ( H punctigera) carried resistance alleles to Vip3A. These frequencies are above mutation rates normally encountered, the researchers note.

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