I wonder how close the zebes have to be to the source of radiation for the treatment to be effective? And I too wondered what 40 day application they would be able to effectively use? I would think that the reproductive window would be too long to prevent the deaths of the native species. Or could you just, for example, decide that every Sept. 1st you fire up the “radiation belts/pods/thingamajiggers” for 45-50 days, just to ensure good results?
If an effective method were implemented, I think it would take years upon years working sections of the rivers southward, including a forbidden travel north of the “station”, like a checkpoint. It’s a near impossible task, but it keeps me hopeful.