What is the Milfoil Weevil? Is it Found in Mutual Ohio


The eurasian water milfoil weevil (Euhrychiopsis lecontei) is known as an eco-friendly plants predator of some kinds of milfoil and has actually been take a look at very carefully by research scientists as a natural control for water milfoil over of 2 entire years. Mostly due to the fact that weevils are generally discovered in Mutual, Ohio USA ponds having eurasian watermilfoil concerns, the chances are great that they presently populate your fish pond. Yet, as a result of the reality watermilfoil will grow so promptly, natural populaces of weevils simply can not normally handle it. Consequently one means is to simply raise the natural milfoil weevil populace to sustainable quantities adequate to efficiently manage the eurasian water milfoil over the lasting.

Exactly what is biocontrol? All-natural control, or biocontrol, is considered the procedure related to breeding and after that letting go of all-natural enemies (predators and also bloodsuckers) of numerous other organisms which are viewed as parasites (hosts). An efficient biocontrol agent is rather targeted to one or possibly a few hosts which’s why, these all natural control representatives tend to be flawlessly safe to people as well as do not trigger harm to the actual environment. They merely enhance the all-natural balance of mother nature. Continuously remember, however, that biocontrol does not completely eliminate these undesirable bugs; it keeps them at reduced degrees where they typically aren’t thought to be a nuisance.
Just how specifically does the milfoil weevil impact eurasian water milfoil in Mutual?

Organic control bacteria in fact decrease their host plants. Not just does the weevil trust the vegetation for nourishment, however furthermore completing all of its living stages. Comparable to a butterfly, the weevil’s life-span stages have an egg cell, larvae, pupa, then fully grown stage. When adults, they’ll eat the eurasian water milfoil, but additionally look for lively watermilfoil pointers (described as the meristem) to lay eggs. When the eggs hatch out to larvae, the larvae tunnel down with the whole stem producing ports in the stem walls while it goes throughout and also burrows the stem tissue. This sort of indoor destruction inhibits all the supply of nutrients throughout the plant along with the origins, where energy is maintained for next years’ development. Moreover, holes within the stem developed by the larvae make it possible for gas to escape as well as make the plant to shed buoyancy in the water. When the stem is struck by the weevil and then dies, it begins to fall over and also bear down close-by stems, drawing them better from the lake surface. This opens the plant cover and also permits wanted indigenous plant life to compete better, and also at some point change the eurasian water milfoil beds.

In many cases, 3 to 4 additional generations of milfoil weevil’s need to continue and also increase as well as expand throughout the body of water in a period. Ultimately, as the watermilfoil lowers within the treated body of water, the beetle number continuously decreases to a self-sufficient level.

Exactly what outcomes can be expected while using the eurasian watermilfoil weevil? On the whole, the purpose is to construct a longer term people of the milfoil weevil’s which will persistently regulate the eurasian water milfoil for years ahead. Combating massive milfoil troubles can be challenging with out a details weevil-stocking approaches to optimize success. This includes stocking somewhat multitudes of weevils in lots of places over 2-3 years on average, relying on the scale of infestation. We also know that stocking added weevils in the very first year increases the price connected with lake-wide control.


Preferred control taking advantage of the weevil typically takes in between 2 or 3 years on average. Control includes:

  • Massive decrease in water milfoil density, and also in many cases decrease of nearly all eurasian watermilfoil beds;
  • Maintenance of the making it through plants listed below the water’s surface at non-nuisance arrays;
  • Help to increase of native vegetation types and also re-establishment of a varied native plant neighborhood within locations once covered with milfoil.

A lot of aquatic weed management treatments are available by considering our companion website revealed to the right.