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Knox County Soil and Water Conservation District

Stats on Invasive Plants in Knox County

The Natural Resource Specialist has been performing invasive species surveys for landowners since the end of 2016. Here are statistics from 29 of those surveys around the county.

Figure 1 shows the most prevalent and problematic species found during those surveys. Amur Honeysuckle was most commonly found as the most problematic species on 52% of the properties, followed by Wintercreeper with 21%, and third being Multiflora Rose with 10%.

Figure 1

Figure 2 shows the second most prevalent and problematic species found during those surveys. Amur Honeysuckle and Wintercreeper were tied as the second most problematic species on 24% of the properties, followed by Multiflora Rose with 14%.

Figure 2

Figure 3 shows the third most prevalent and problematic species found during the surveys. Burning Bush was the third most problematic species on 21% of the properties, followed by Japanese Honeysuckle and Wintercreeper tied with 17%.

Figure 3

Figure 4 shows the total count of all of the times a species was found as one of the top three most prevalent and problematic species during the surveys. This mirrors Fig. 1 with Amur Honeysuckle was most commonly found as one of the top three species on 23 of the 29 properties, followed by Wintercreeper with 18, and third being Multiflora Rose with 8.

Figure 4

Figure 5 shows how often an invasive species is found during surveys, regardless of local abundance on the site. Amur Honeysuckle is the most commonly found with being present on 27 of the 29 surveys, Wintercreeper and Japanese Honeysuckle follow with 22, then Multiflora Rose with 20, and Beefsteak Plant in fifth with 16.

Figure 5

Here is some of the demographic information on the surveys.

Demographics 
Number of Properties29
Smallest Property (ac.)0.292
Largest Property (ac.)173.7
Average Property Size (ac.)26.96559
Median Property Size (ac.)4.5

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