What chemicals are approved for use in Michigan ponds and lakes and what plants will they kill?
USE ONLY CHEMICALS SPECIFICALLY LABELED FOR AQUATIC USE! Algicides and herbicides approved for aquatic use and the plants they control are listed in Appendix 1. This listing should be used for preliminary planning only since chemical approvals for aquatic use may change. Up-to-date information should be obtained annually from your county MSU-Extension office or the DEQ during the permit application process. 5) How much algicide or herbicide should I add? Dosage rates are listed on the label. FOLLOW LABEL DIRECTIONS CAREFULLY! General application rate recommendations cannot be made since chemicals may be sold with different levels of active ingredient or with different active forms. DO NOT OVER-TREAT! Over-treatment will increase the probability of killing fish and other aquatic organisms either directly or indirectly as a result of rapid plant die-off and subsequent oxygen depletion due to decomposition. Some herbicides may not produce the desired effects if applied at concentrations a
