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Any changes towards resistance development of the #fallarmyworm to #BtMaize could be better addressed and understood when detected early. What approaches are scientists using to monitor and detect possible resistance build up considering #fallarmyworm populations evolve differently?

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Vinod Kukanur
Vinod Kukanur (@vinodkukanur)
2 months ago

Several methods are used for monitoring #resistance to Bt crops. Such as #F2 screen, F1 screen, sentinel plots, DNA marker method, discriminating dose assay, dose-response assay etc., Among these most widely used method is F2 screen due to its high accuracy in detecting rare and any trivial form of resistance. F2 screen is so sensitive that it can detect resistance even when other methods fail to detect resistance. Several reports have been published that detected rare resistance using F2 screen in #Fall armyworm (for more information refer to this article https://doi.org/10.1016/j.cropro.2014.06.019)

Richard Goodman
Richard Goodman (@rgoodman2unl-edu)
2 months ago

At some level action plans are needed and some flexibility. I am not an IRM person, but in working with Joe Huesing and speaking with others, some flexible options are needed that are practical for the region/governments impacted. some countries in Africa should be adopting some biotech varieties for combating FAW. Cry1Ab or Cry1Ac may have efficacy against the moths in some African countries. Some Bt crops are restricted due to legal constraints. I suggest that you do not need 5 year or 3 year or even 2 year safety studies on events approved in some other countries now, like… Read more »