Occurrence and distribution of potential milfoil control agents in Minnesota and select sites in Wisconsin. Modified from Newman and Maher (1995; Ent. News 106: 6-12). Unverified records added since 1994 are indicated with **, but these are not comprehensive surveys. M.s. obs. = year in which the occurrence of M. spicatum was first recorded (None = not known to be present). Myriophyllum spicatum is not known to occur in Gull Lake (M. sibiricum is abundant) and the nearest known M. spicatum population is approximately 30 km away. Location is given as Township, Range and Section of sampling sites. # = a minor infestation of M. spicatum was found and chemically treated in 1992 and no M. spicatum has been seen since. Organisms collected in Gull and Christmas Lakes were taken from M. sibiricum. *These identifications have not been verified by a taxonomic specialist. All other identifications have been verified. A.e. = Acentria ephemerella; C.m. = Cricotopus myriophylli ; E.l. = Euhrychiopsis lecontei .
LAKE NAME |
COUNTY |
STATE |
M.s. obs. |
LOCATION |
Herbivore |
| Auburn | Carver | MN | 1989 | T116N;R24W;S10 | E.l.,A.e. |
| Bierbrauer | St. Croix | WI | None | T31N;R17W;S4 | |
| Calhoun | Hennepin | MN | 1989 | T28N;R24W;S5 | E.l.** |
| Cedar | Hennepin | MN | 1990 | T29N;R24W;S29 | E.l. |
| Christmas | Hennepin | MN | 1992# | T117N;R23W;S35,36 | E.l. |
| Clearwater | Wright | MN | 1989 | T121N;R27W;S17 | |
| Devils | Sauk | WI | <1976 | T11N;R6E;S13 | E.l.,C.m. |
| Fish | Dane | WI | 1967 | T9N,R7E;S3 | E.l. |
| Green | Chisago | MN | 1990 | T33N;R21W;S13 | |
| Gull | Cass | MN | None | T134N;R30W;S24,25 | E.l. |
| Independence | Hennepin | MN | 1989 | T118N;R23,24W;S7,12 | |
| Lake of the Isles | Hennepin | MN | 1988 | T29N;R24W;S32,33 | E.l.** |
| Long | Hennepin | MN | 1992 | T118N;R23W;S34,35 | C.m., E.l.** |
| Mallalieu | St. Croix | WI | <1990 | T29N;R19W;S18,19 | C.m.*,A.e.* |
| Lake Minnetonka Sites: | |||||
Gideons Bay |
Hennepin | MN | 1987 | T117N;R23W;S27 | E.l. |
Grays Bay |
Hennepin | MN | 1987 | T117N;R22W;S8 | E.l.*,C.m. |
Halsted Bay |
Hennepin | MN | 1987 | T117N;R24W;S34 | |
St. Albans Bay |
Hennepin | MN | 1987 | T117N;R23W;S26 | E.l.** |
Shady Island |
Hennepin | MN | 1987 | T117N;R23W;S30 | E.l.**,C.m. |
Smiths Bay |
Hennepin | MN | 1987 | T117N;R23W;S10,11 | E.l.,C.m.*,A.e.** |
Veterans Bay |
Hennepin | MN | 1987 | T117N;R23W;S23 | E.l. |
| Minnewashta | Carver | MN | 1989 | T116N;R23W;S5 | E.l.,C.m.,A.e.* |
| Odewinjib (Squaw) | Clearwater | MN | none | T143N;R36W;S5 | E.l. |
| Onalaska (Mississippi R.) | La Crosse | WI | <1987 | T17N;R7W;S31 | |
| Otter Lake | Anoka/Ramsey | MN | 1989 | T30N;R22W;S3,35 | E.l.,A.e.** |
| Parker | Hennepin | MN | 1991 | T118N;R22W;S28 | |
| Sarah | Hennepin | MN | 1990 | T118N;R24W;S2 | A.e.* |
| Spring (Mississippi R.) | Buffalo | WI | <1989 | T20N;R12W;S17,20 | |
| Vadnais | Ramsey | MN | 1989 | T30N;R22W;S30 | E.l.* |
| Virginia | Carver | MN | 1988 | T116N;R23W;S6 | A.e. |
| Waverley | Wright | MN | 1991 | T119N;R26W;S32 | |
| Zumbra | Carver | MN | 1989 | T116N;R24W;S2 | C.m. |