. Control of cabomba, Eurasian milfoil and water lily in Lake Quonnipaug with herbicides and hydroraking, 2002. Nymphaeaceae; Eurasian watermilfoil; Noxious weeds; Aquatic herbicides; Cabomba caroliniana. Control of Cabomba Eurasian Milfoil and Water Lily in Lake Quonnipaug with Herbicides and Hydroraking 2002 Figure 9. Transparency in Lake Quonnipaug, 2002. E '^ â"#⢠Center. Mesotrophic I I I I 13-Jun 18-Jun 21-Jun 26-Jun Date 0 2 h 4 6 8 10 12 14 Q. a> â a u u CO 3-Jul 10-Jul Total phosphorus (P) concentrations in the lake water are considered a key indicator of the state of eutroph
. Control of cabomba, Eurasian milfoil and water lily in Lake Quonnipaug with herbicides and hydroraking, 2002. Nymphaeaceae; Eurasian watermilfoil; Noxious weeds; Aquatic herbicides; Cabomba caroliniana. Control of Cabomba Eurasian Milfoil and Water Lily in Lake Quonnipaug with Herbicides and Hydroraking 2002 Figure 9. Transparency in Lake Quonnipaug, 2002. E '^ â"#⢠Center. Mesotrophic I I I I 13-Jun 18-Jun 21-Jun 26-Jun Date 0 2 h 4 6 8 10 12 14 Q. a> â a u u CO 3-Jul 10-Jul Total phosphorus (P) concentrations in the lake water are considered a key indicator of the state of eutrophication. Frink and Norvell (1983) reported that lakes with P levels below 15 ppb can be considered oligotrophic, lakes with P between 15 and 30 ppb are mesotrophic and lakes with P over 30 ppb are eutrophic. P concentrations during this study (Figure 9) generally ranged between 5 and 20 ppb and would classify Lake Quonnipaug as oligo/mesotrophic. This is similar to concentrations found in previous studies (Canavan and Siver, 1995; Frink and Norvell, 1983). Sediment in the boat launch treatment site contained %/wt organic matter, %/wt sand ( - mm), silt ( - mm) and %/wt clay (< mm). Variability between sites, expressed as standard devia- tion, was for organic matter, for sand, for silt and for clay. The high organic content of the sediment is thought to have played a role in binding and later releas- ing the fluridone (Sonar SRP) applied in 2001. This may explain the slower than expected control of the cabomba (Bugbee and White, 2001). The aquatic plant survey performed on July 30, 31 (Figure 11) revealed good residual control of cabomba in 2001 at the boat launch treatment site. Cabomba harvesting on July 29 and 31, removed a total of 110 plants from the site. Most plants appeared to be recently rooted fragments that had floated in from other parts of the lake. An area of concen- trated cabomba occurred at the m
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