Phragmites-Mapping-Treatment

Phragmites introduction: 2018

Phragmites has been treated on Clark Lake for many years. The Clark Lake Advancement Association (CLAA) treats the shore and contiguous land as part of our routine programs.

Traditionally, Phragmites Fest, (our main treatment day) has occurred on the second Saturday in September. We provide training, supplies, herbicide, water and refreshments. There is the opportunity to join members from all areas of the lake and some families even have multiple generations involved. The project goal is to both strengthen our sense of community and commitment to the lake by combining a social activity with the work of treatment.

Phragmites distribution around the lake means travel and set up time can impair our efficiency. This means we usually have to do some pre-Fest treatments of smaller and more disparate areas. An area in the northeast section presents the need for special access. One very dense site will also necessitate extra preparation in the winter or spring. Therefore, additional volunteer opportunities still exist even if you cannot attend the larger Fest event.

Treatment should be done when the herbicide will be translocated from the leaves and stalk  into the roots.  Therefore treatment should occur from the end of August to the middle of September.

A DNR permit is required for treatment near the shore and wetlands. The permit requires the GPS location and estimated area of each treatment site.  Since the permit processing can take a few weeks, the survey and mapping are done later in July.

A certified herbicide applicator must be named in the permit and also be present during the treatment. The Door County Invasive Species Team (DCIST) has assisted us in locating or even providing us with a certified applicator. DCIST has also assisted with completing the permit, post treatment report, obtaining signage and supplying some equipment.

CLAA usually handles the plant survey, mapping, permits and treatments. During 2016-2018, the Ridges received a grant for both their own and adjoining properties. Since the Ridges have property on Clark Lake we were able to participate in that grant.  The Ridges provided the survey, mapping and permit. They also contracted with a private company to treat a large, nearly inaccessible boggy patch of phragmites in the north east section of Clark Lake. CLAA provided transportation for the survey team, coordination with the landowners and we also did the treatment for the remainder of the lake. The Ridges grant has now expired and CLAA will resume all of the responsibilities.

CLAA relies on volunteers for all of its activities. We do offer reimbursement for oil, gas and use of boats but our members usually volunteer these without additional cost to us. Our budget for phragmites is about $200.

We have been successful in eradicating most of the phragmites along the shore with remaining areas having only a handful of plants.  This year (2018) we did find a new, moderately dense, patch along the southeast shore that involves three properties. There is a very dense inland infestation on Clark Lake Court that involves a large area, but an equally dense area nearer the shore on the same property, identified in 2015, is now well controlled. The moderately dense patch in the marsh/ bog on the north east portion of the lake is now reduced to scattered sporadic plants.