Consultant's Report - Minnesota State Legislature
Consultant's Report - Minnesota State Legislature Consultant's Report - Minnesota State Legislature
Table 2. Summary ofLCso values. Expt Chemical Pre-fert LCso Post-fert LCso 24-h LCso 48-h LCso 72-h LCso 1 Cutrine 0.001 0.013 (0.006 0.019) 0.008 (0.002 - 0.014) 0.009 0.012 CUS04 - - 0.008 - 0.007 2 3' Cutrine - - - - - CUS04 0.004 (0.002 - 0.005) 0.005 - - - Cutrine 0.002 - - - - CUS04 - - - - - Since there was no difference in the toxicity of Cutrine®-Ultra and Cu to postfertilization stage eggs, we conclude that Cutrine®-Ultra has a mode of toxicity upon gamete viability or the fertilization physiology other than that associated with Cu exposure. Literature TRVs for D. polymorpha are scarce, although Fisher et al. (1994) determined LCso values for six molluscides and concluded that larvae were more sensitive than adults to five of the compounds. The only Cu-related D. polymorpha information that these authors are aware ofis unpublished by McMahon and Tsou (1990) from a conference proceeding, indicating that 5 mg CulL 100 % mortality of D. polymOlpha veliger in 24 h in unknown water quality conditions. Based on results from the current study, such levels of mortality can be achieved at much lower concentrations ofCu in Lake Ossawinnamakee water. Results for LC99 data are summarized in Table 3. LC99 values are shown in bold type, and 95 % confidence limits in parentheses where the model allowed this estimation. All data are mg CulL. 15
Expt Chemical 1 2 3 Table 3. Summary ofLC99 values. Cutrine 0.081 Pre-fert Post-fert 24-h 48-h 72-h LC99 LC99 LC99 LC99 LC99 0.027 0.039 (0.018 - 0.189) (0.019 - 17.414) 0.038 0.047 CUS04 - - 0.0207 - 0.020 Cutrine - - - - - CUS04 0.016 (0.010 - 0.054) 0.014 - - - Cutrine 0.147 - - - - CUS04 - - - - - Estimates of LC99 from all experiments demonstrate that 24-h exposure with Cutrine®-Ultra can be expected to control the majority ofD. polymOlpha larvae at alllife stages in the range 0.027 - 0.147 mg CulL, using the water quality parameters for Lake Ossawinnamakee in June. 16
- Page 129: ./}' 03/16/2005 14:40 FAX 217585189
- Page 144 and 145: Zebra Mussel Feasibility Study-Main
- Page 146 and 147: Zebra Mussel Feasibility Study-Main
- Page 148 and 149: Zebra Mussel Feasibility Study-Main
- Page 150 and 151: Zebra Mussel Feasibility Study-Main
- Page 152 and 153: Zebra Mussel Feasibility Study-Main
- Page 154 and 155: Zebra Mussel Feasibility Study-Main
- Page 157: FINAL REPORT OF THE EFFECTS OF CUTR
- Page 160 and 161: Limitations in this data set hav.e
- Page 162 and 163: Appendix 1. Development of D. polym
- Page 165 and 166: Figure 2 demonstrates that hatching
- Page 167 and 168: Experimental designs were modified
- Page 169: Pre-fertilization andpost-fertiliza
- Page 174: Appendix 4: Effect of Exposure Time
- Page 178 and 179: Aquatic invertebrates in upper Peli
- Page 180 and 181: In contrast, fall sampling revealed
- Page 184 and 185: Lake Ossawinnamakee and Pelican Bro
- Page 186 and 187: VII-F. Meeting Summaries
- Page 188 and 189: Rich Rezanka would like us to refer
- Page 190 and 191: VII-G. List of Abbreviations Used
- Page 192: VII-H. Glossary of Terms
- Page 195 and 196: MINNESOTA DEPARTMENT OF NATURAL RES
- Page 197: Secchi disc MINNESOTA DEPARTMENT OF
Expt Chemical<br />
1<br />
2<br />
3<br />
Table 3. Summary ofLC99 values.<br />
Cutrine 0.081<br />
Pre-fert Post-fert 24-h 48-h 72-h<br />
LC99 LC99 LC99 LC99 LC99<br />
0.027 0.039<br />
(0.018 - 0.189) (0.019 - 17.414)<br />
0.038 0.047<br />
CUS04 - - 0.0207 - 0.020<br />
Cutrine - - - - -<br />
CUS04<br />
0.016<br />
(0.010 - 0.054)<br />
0.014 - - -<br />
Cutrine 0.147 - - - -<br />
CUS04 - - - - -<br />
Estimates of LC99 from all experiments demonstrate that 24-h exposure with<br />
Cutrine®-Ultra can be expected to control the majority ofD. polymOlpha larvae at alllife<br />
stages in the range 0.027 - 0.147 mg CulL, using the water quality parameters for Lake<br />
Ossawinnamakee in June.<br />
16
Change language