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Roger Batt asks Bryan Dallolio how a plant like Spotted Knapweed would get into this area and what could have started the spread of it. Bryan replies that in this setting here by the river, it's very difficult to say. The weed could have been brought in by wildlife or human disturbance. They have been here at least a year because you can see the senescent (dead) vegetation. Roger states that it is really disturbing to see such a terrible noxious weed threaten such a vital area such as this Boise River area. But he notes, it is not uncommon to see noxious weeds spread in pristine areas of Idaho and this is just one example.
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