Contractor reports two Sonar applications, eyes drone spraying and permit changes for Barnes Lake

Contractor Scott summarized the Barnes Lake treatments and next steps for the Barnes Lake Steering Committee. Scott said his crew applied two Sonar treatments this year (Sonar is the trade name for floridone) and that the product was used as a systemic, whole-lake treatment. "I'm currently working on that still," Scott said when asked about delivering a written report, and he committed to providing one in time for the committee's January meeting.

Why it matters: Sonar (floridone) is a systemic herbicide used here infrequently because of cost and its broad effect across the water column; Scott and members said the product can require a sustained concentration (members discussed keeping the concentration above roughly "4 or 5 parts per million" for about 30 days to be effective) and is usually reserved for major treatment cycles (Scott noted the systemic…