. 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. -â¢â Shoal East -â â Shoal West -'*â Shoal West +100 -â¼â Center. 80 70 60 9 50 ^ 0) 80 Q- o 70 60 50 13-Jun 10-Jul RESULTS AND DISCUSSION The pretreatment visual inspection of the lake on June \l, 2002 revealed that the aquatic vegetation survey performed on September 27, 2001 (Figure 1) was accurate in its de- scription of the current situation. No cabomba was appar- ent in the boat launch
. 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. -â¢â Shoal East -â â Shoal West -'*â Shoal West +100 -â¼â Center. 80 70 60 9 50 ^ 0) 80 Q- o 70 60 50 13-Jun 10-Jul RESULTS AND DISCUSSION The pretreatment visual inspection of the lake on June \l, 2002 revealed that the aquatic vegetation survey performed on September 27, 2001 (Figure 1) was accurate in its de- scription of the current situation. No cabomba was appar- ent in the boat launch cove where treatment with Sonar SRP occurred in 2001. This area, however, did contain a sparse population of Eurasian milfoil, variable milfoil (Myriophyllum heterophyllum), robbins pondweed, large leaf pondweed (Potamogeton amplifolius), coontail {Ceratophyllum sp.), and elodea (Elodea canadensis). Lily pads {Nymphea sp., Nuphur sp.) and other emersed vegeta- tion were present along the shoreline. In other portions of the lake, particularly along the southeast shore, cabomba was present either as diffuse plants or occasional dense patches. Eurasian milfoil occurred mainly in the center shoal areas and at a few locations on the east side of the lake. A few small patches of Eurasian milfoil were present on the southern side of the swim area at the town beach. This was an area that had been treated with Navigate in spring 2001 and, thus, may indicate incomplete control. Sporadic Eur- asian milfoil could be found elsewhere. Water marigold was difficult to find, but this is not unusual because most of the growth of this plant occurs later in the season. The lake bottom between 3 and 9 feet deep was mainly covered with robbins pondweed. Large leaf pondweed was present in fre- quent dense patches in the northern parts of the lake and in the center shoal area. In other parts of the lake, less than 6 feet deep, large leaf pondweed occurred in sporadic patches. The June 13th Na
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