A number of fields in southwestern Minnesota have reported unexplained failure (poor performance) of recent insecticide treatments and will require additional applications to control existing populations.
If a field needs to be treated more than once in the same year, remember the
A number of fields in southwestern Minnesota have reported unexplained failure (poor performance) of recent insecticide treatments and will require additional applications to control existing populations.
If a field needs to be treated more than once in the same year, remember the potential for development of insecticide resistance (U of MN fact sheet on insecticide resistance). Do not reapply the same insecticide mode of action (insecticide group).
For example, if a field was treated with an organophosphate insecticide and needs to be treated again for aphids or some other pest, such as spider mites, avoid using organophosphates for the second application. Inst