Invasive Species

Every LMA member bears direct responsibility in helping prevent invasive plants from impacting the Lake Mokoma environment. Remember to clean your boats and if you think you may have seen either of the following plants on your property or in the lake, please contact the Lake and Dam Committee or the LMA Managers so appropriate action can be taken.

Japanese Knotweed

Numerous growths of knotweed have been recently identified in the vicinity of Lake Mokoma: near the intersection of Lake Road and Sand Run Road, the west end of the dam, Mokoma Avenue, Fountain Avenue, and the southwest end of the lake on South Railroad Bed Lane, as well as the southwest section of Fountain Avenue. Left unchecked, it will continue to spread and could eventually dominate the shoreline of the lake. The severity of its spread can be seen in the Muncy Creek watershed as it lines the shoreline from Sullivan County to Hughesville and beyond. Here is a link that provides information to help you identify the plant:

Cabomba Caroliniana (Fanwort)

Recently, Lake Mokoma experienced wide-spread infestation of this invasive aquatic plant that cost the Association $30,000 to eliminate. This highly invasive plant will spread throughout the lake and effectively choke out all other beneficial aquatic vegetation which could impact the fish population and recreational boating in the lake, as well as the general health of the lake by altering its nutrient and pH levels. It was likely introduced to Lake Mokoma by a member or guest’s boat/trailer that was utilized in a body of water infested with the invasive plant, then placed in Lake Mokoma prior to proper cleaning. Following is a link to pertinent information:  docId=1738823&DocName=Carolina%20fanwort.pdf

Hemlock Woolly Adelgid

No tree species is more iconic of our area than the Hemlock.  Unfortunately, this tiny insect, the wooly adelgid, has been decimating hemlock populations throughout its range. The insect has been seen on trees in our area.  Luckily, some of these populations are fluctuating and in some cases have disappeared from the tree. The insect’s life cycle makes it a difficult one to control. However, there are measures that homeowners can take for emergent or minor infestations, especially on smaller trees. For more information:

Spotted Lanternfly

This relatively new threat is spreading quickly throughout Pennsylvania. It is an opportunistic pest that attacks a variety of plants which makes it a potentially impactful insect. If you see one, you are encouraged to kill it by squashing or by submersing it in alcohol or hand-sanitizer. It does not bite or sting but can fly for short distances. Penn State is recording sightings (see the link below) and mapping its spread. Additionally, the PA Dept. of Agriculture has placed nearly the entire southern part of the state under quarantine (this included Lycoming County) whereby residents are asked to be diligent before they travel. 


For more information:

To report a sighting:


A quarantine checklist for residents:


Shrub Honeysuckle (several species)

This nuisance shrub emerges early in the season, and by growing quickly and densely, out-competes native shrubs such as blueberry. The berries are eaten by wildlife, but have little nutrition compared to native shrubs. It is well-established around Mokoma and can be seen on roadsides, trails, and marinas. Despite its ubiquity, it is controllable by mechanical means. Homeowners should consider cutting them as close to ground level as possible in mid-summer as the berries appear, as this repeated strategy has proven effective in areas around the lake. For more information: