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| Public Domain Films And Royalty Free Stock Footage |
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Public Domain Archive Film Stock Footage Library |
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| Available in NTSC formats: (24 hr. turn-around) |
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| Available in PAL formats: (72 hr. turn-around) |
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| DVD-R Time-Code Preview Disc (NTSC): (24 hr. turn-around) |
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| keywords: knapweed, noxious weed, monitoring methods, biological controls |
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Synopsis: Knapweed has run rampant over a large portion of the Western United States, scientists show monitoring and control methods... (read more) |
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Information: 2000 18 min COL |
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Biological control in the form of insects that specifically attack knapweed is an important part of controlling this noxious weed. This video describes monitoring methods for both root feeding and seed head feeding insects that have been released for biological control of knapweed. The viewer will learn how to monitor for these insects using easy and effective techniques. Using a consistent monitoring approach allows us to determine if the insect is established, is spreading from the original point of release, and is having an impact on the knapweed.
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