What is the Milfoil Weevil? Is it Found in Glenwood Minnesota


The eurasian water milfoil weevil (Euhrychiopsis lecontei) is referred to as an eco-friendly plant life predator of some sorts of milfoil as well as has been look at very carefully by research study scientists as a natural control for water milfoil in excess of 2 whole decades. Generally because weevils are generally found in Glenwood, Minnesota United States ponds having eurasian watermilfoil problems, the chances are very good that they currently occupy your fish pond. Yet, because of the reality watermilfoil will expand so promptly, all natural populaces of weevils merely can not usually manage it. Therefore one way is to just raise the natural milfoil weevil populace to lasting amounts adequate to successfully take care of the eurasian water milfoil over the long-lasting.

What exactly is biocontrol? Natural control, or biocontrol, is considered the procedure associated with reproduction then releasing natural adversaries (predators and bloodsuckers) of various other organisms which are considered as insects (hosts). A reliable biocontrol representative is quite targeted to one or possibly a very few hosts which’s why, these all natural control agents tend to be completely risk-free to people and do not trigger injury to the real environment. They just boost the natural equilibrium of nature. Continue to bear in mind, however, that biocontrol does not totally get rid of these undesirable insects; it keeps them at reduced levels where they aren’t believed to be an annoyance.
Exactly how specifically does the milfoil weevil impact eurasian water milfoil in Glenwood?

Organic control bacteria really lower their host plants. Not only does the weevil rely on the greenery for nutrients, yet furthermore completing all its living stages. Equivalent to a butterfly, the weevil’s life-span phases have an egg cell, larvae, pupa, and after that mature phase. When adults, they’ll eat the eurasian water milfoil, however additionally try to find vivid watermilfoil pointers (described as the meristem) to lay eggs. When the eggs hatch out to larvae, the larvae passage down with the whole stem producing ports in the stem walls while it goes in and out and also hollows out the stem cells. This sort of interior damage hinders all the supply of nutrients all through the plant along with the origins, where energy is retained for following years’ growth. Furthermore, holes within the stem produced 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 attacked by the weevil and after that dies, it starts to tip over and bear down close-by stems, pulling them further from the lake surface area. This opens the plant cover and allows wanted native plant to complete much better, and also at some point change the eurasian water milfoil beds.

Most of the times, 3 to 4 additional generations of milfoil weevil’s need to continue and increase as well as spread out throughout the body of water in a period. Ultimately, as the watermilfoil lowers within the dealt with body of water, the beetle number steadily declines to a self-sufficient degree.

Exactly what results can be anticipated while using the eurasian watermilfoil weevil? Overall, the goal is to build a longer term populace of the milfoil weevil’s which will constantly manage the eurasian water milfoil for several years ahead. Combating massive milfoil problems could be difficult with out a specific weevil-stocking methods to enhance success. This includes equipping rather great deals of weevils in numerous locations over 2-3 years typically, depending upon the scale of invasion. We likewise recognize that equipping additional weevils in the very first year increases the rate associated with lake-wide control.


Preferred control using the weevil normally takes in between 2 or 3 years typically. Control entails:

  • Significant reduction in water milfoil thickness, and also in many cases decrease of almost all eurasian watermilfoil beds;
  • Maintenance of the enduring plants listed below the water’s surface at non-nuisance varieties;
  • Aid to enhance of native plants types as well as re-establishment of a varied native plant area within locations as soon as covered with milfoil.

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