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2. Eurasian water Milfoil CITY OF t. c BAssEN • t 1 �" 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 f` (612) 937-1900 ' MEMORANDUM TO: Jim Chaffee, Public Safety Director ' FROM: Scott Harr, Assistant Public Safety Director DATE: January 26 , 1989 SUBJ: Eurasian Water Milfoil This memo is to respond to your request for additional infor- mation on the topic of Eruasian Water Milfoil, which has again ' received media coverage. The consensus certainly is that this continues to be a potentially serious threat to our lakes in Chanhassen. I am attaching a copy of my August 1, 1988 memo to you regarding the topic. The information I obtained at that time from Mr. Howard Krosch, the Department of Natural Resources ' Aquatic ' Biologist in charge of lake monitoring and control, is exactly that set forth in the January 23 , 1989 Sailor articles on this weed. I took advantage of the newspaper article to contact Mr. Kevin Kretsch, President of Lake Restoration, Inc. , 620 Hamel Road, Hamel, MN 55340, 478-9421, who is very concerned about this ' problem and is a member of the task force seeking to deal with this problem. He echoed the information cited in the article, and that which I obtained from the DNR last year, re-emphasizing ' the following items as the best way of responding to this threat: 1 . To keep Eurasian Water Milfoil from entering our lakes by ' encouraging that plant fragments be cleaned off of boats and trailers before going into the water; 2 . Increase public awareness on the topic; 3 . If the weed is spotted, to immediately use a systemic herbicide. Mr . Kretsch agreed to provide any presentations that may be requested on this topic to the City Council. , i Mr. Jim Chaffee January 26 , 1989 Page 2 I have also again talked with Carver County Weed Inspector Ken , Johnson, 1016 Fox Run Road, Waconia, MN 55387 , 442-5307 . Mr. Johnson echoed Mr. Kretsch' s comments. Mr. Johnson agreed to pay particular attention to this problem during his inspections in Chanhassen. He stated that he would be the best first contact in the event of the weed being spotted in our City' s lakes . I have also talked with Steve Colvin, the Aquatic Biologist with the DNR, who was quoted in the Sailor articles . He agreed with the information that I have set forth, and recommended that I contact the Lake Minnetonka Conservation District Office, which I have done. Mr. Colvin did remind me that prior to any chemical control being undertaken, a permit is required from the DNR. In speaking with Mr. Gene Strommen of the Lake Minnetonka Conservation District ( 473-7033) , he agreed with the information that I had acquired. He offered us several hundred brochures that they had available on the topic, and authorized us to use these in any manner we wished, including copying them for distri- bution. I will place some of these at the front desk of City Hall, send some to the Lotus Lake Homeowner' s Association, and have the remainder available to use as opportunities present themselves , i .e. distribution along with crime prevention material; meetings at City Hall; or any other creative oppor- , tunities . As stated in my August 1, 1988 memo, I believe an immediate response to this threat would be to post signs at lake access points , requesting voluntary cooperation in cleaning off boats , trailers, and motor props. I believe this action would best be taken through our Park and Recreation Commission. I have already ' requested that Carver County Weed Inspector Ken Johnson maintain a look-out for this weed as well as being available should someone else locate it. I will also ask that Sailor and Villager Newspapers continue whatever efforts they can provide in pro- viding public education through their newspapers. Unfortunately, I have been unable to locate any public monies available to assist in such educational approaches as mailings, etc. I believe the resources exist to aid in any additional efforts we wish to make. Please feel free to contact me with any additional questions or concerns . Attachments: Copy of Sailor Newspaper Articles ' cc: Don Ashworth, City Manager Lori Sietsema, Park and Recreation Coordinator ' Ursula Dimler, Councilmember Cindy Gilman, Lotus Lake Homeowners Association, 6613 Horseshoe Curve, Chanhassen, MN 55317 1 II ' . CITY OF II ., ,,,. C . 1 1,..1. ,,., - ' 14'7 t ' H A. 1:1131: . , 690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317 I �.a (612) 937-1900 MEMORANDUM ITO: Jim Chaffee, Public Safety Director FROM: Scott Harr, Assistant Public Safety Director S IDATE: August 1, 1988 IISUBJ: Eurasian Watermilfoil II Per your request, I have completed some research regarding Eurasian Watermilfoil. I have talked with Mr. Howard Krosch, an Aquatic Biologist who manages the Department of Natural Resources lake monitoring and control unit. He was able to provide some IIsuggestions on how we might respond to this potential problem. He explained to me that it is the transfer of the plant itself that will cause the plant to grow in a lake. Therefore, the best II preventative measure would be to request that people remove any plant fragments from their boats before launching. Eventually, the DNR will be placing signs to this effect at boat access II points on Lake Minnetonka. I did inquire as to whether DNR might assist us by installing such signs, and was advised that this could be an extremely lengthy project, as they have not even made Iup signs for Minnetonka yet. He did recommend that the City consider placing such signs at access points reading something to the effect of: "Help prevent I Eurasian Watermilfoil from getting into this lake. Remove plant fragments from propeller, boat bottom, and trailer. " He did feel that it would be particularly beneficial to require that boats , I motors, and trailers be washed off prior to launching, because actual plant fragments are what cause the problem, rather than something that cannot be seen or could be easily washed off , II these weeds generally get themselves attached to the prop or the rollers on the trailers, etc. If it is decided that such signs would be beneficial, I would recommend that Lori Sietsema pursue this by having such signs made and placed at boat access points . Mr. Krosch was extremely helpful, and I am sure would be happy to provide additional IIinformation if necessary (Phone: 296-0778) . cc: Jim Chaffee, Public Safety Director II Lori Sietsema, Park and Recreation Coordinator Cindy Gilman, Lotus Lake Homeowners Assn, 6613 Horseshoe Cu. Don Ashworth, City Manager II 1 lid r' ' s .. 1 :' J r '• ' MINNESOTA SUBURBAN NEWSPAPERS ' � � V � � w'�V �I� pf � �n��ry 2�, 1���.,- 1, 0 �H�N 4SSgr � � � o,r � �, T vb, I ,':1.-0-N4-0,'w Task force to manage spread of Eurasian water mil-foil Weed poses threat to lake It's lurking - Weed could By Parker Hodges These mats of weeds can be spread to identified by the plant's tip, beneath t h e Beginning with the dumping which sprouts tiny, yellow Chanhassen of a home aquarium into flowers, and the stem,'which is waves: . ., �.•t Chesapeake Bay in the early reddish in color. 1 -,• ;, By Christopher Burns 1940s, Eurasian water milfoil The mats are made up of the ; ` t { has spread to 37 states, two plant's "leaves," which grow Chanhassen's` proximity to Canadian provinces and now from the stem and branches in r-Lake Minnetonka makes the Lake Minnetonka. groups of four. Each leaf is ' �� }' - city's lakes potential targets for First brought to this country made up of 14 to 16"leaflets." :,.• � a Eurasian water milfoil•as a plant for home aquariums, Eurasian water milfoil can be 1 ...,h, ■, >,, ,, .I ..,,`+- •,•. t '� ' invasion. • Eurasian water milfoil is now identified from it's native - _ ' '00 .i' '� v,' `"�^ Steve • Colviri, an aquatic threatening the recreational cousin, Northern water milfoil, _ -,—_. - ---• biologist with the Minnesota value of Lake Minnetonka. by the number of leaflets. • -‘,...46.4,;,;-.0. -‘,...46.4,;,;-.0 . Department of Natural The weed's main threat stems Northern water milfoil has 7 •- . .- Resources (DNR), said the from its potent reproductive to 8 leaflets on its leaves. "'�"'— ,'.e -•-- ., - • - R -, �.f weed could easily spread from capabilities and the Another difference is that a ; ,• � _ Lake Minnetonka to Chanhassen characteristics of it's growth. majority of the biomass of Eura- 1`•` ' waters. The weed roots in the "literal sian water milfoil is at the sur- 3 r - ; "There are ; many nearby area" of the lake, from the face while native plants tend to _ lakes that have a potential for shoreline to 15 feet, and grows evenly spread its biomass along . +••" . ; _ ..-. -IIE • infestation,"he said. toward the surface at a rate of the entire plant, according to -' • -- -- Colvin said the DNR does not•up to two inches a day. Kevin Kretsch,of Lake Restora- -t'-'',„ ;,-.).3•--,..71.:...:,.` � f., ,..4' _ .;;, ;�'' - 1 have formal guidelines for iden- A single plant can have multi- tion Inc., a private weed .ct"t •=•�! ' ='•"'►' •~J: , �'!`;! `_: tifying which lakes are at risk- Ple branches,each rising toward management company based in ` - 3— ._ • `� "'`�'y' '-: He said the degree of recrea- � g g Pa Y - ... .. the surface. Hamel. _- _,M .. –; , . .,,;.4-er ;4 tional use of Lake Minnetonka•Once the growth reaches one Eurasian water milfoil's •r t,�:',7.-- •• •' , _ . and the interchange of boaters to two feet below the lake stir- reproductive potency derives =' • - -��_' � �' " r'R�" :.. • :: from Minnetonka to other lakes face, the plant blooms, forming from the need for only one group imperils all recreational waters• tangled , groups of brown The front page of the LMCD's brochure that o ' ' ,•.in the region. �ats..i — --� TILT: a 6�'f Maw v�milf� as —� EN ••••= 111111 IIII 6A—Chanhassen Salim—Week of Jan.23,19.89 Weed from page IA - "Regardless of distance from `!' Lake Minnetonka, there's "I'm sure it's probably Ialways some potential risk there(in Chanhassen.) A".1.-" _ because of the high recreation .y.> �\ -;� use.Unless boaters are careful, You have to believe it's r �,, they could threaten other been introduced," " \ / "�u,; ' .,,,_ F , ""• lakes,"he said. —- .' ' ��.,. Minnetonka is the first lake in —Carver County weed inspector _ ,r=- p ,�,. Minnesota to be infested with Ken Johnson I Eurasian water milfoil, which H ' al ' d�- ,� has spread from the East Coast i` ' •v I:„ '- ' �, " � w`v during the past 40 years. (See uses,"Colvin said. _i , - ti,.,i>-✓, .K accompanying story.) Colvin said the DNR'sr_�i - P1P-- '��' �� �� ' '-•�� 'y Ken Johnson, Carver County strategy for combating Eura- \ �� _- ! " f t� ' weed inspector,said he has not sian water milfoil is two-fold: � u t i. /? / ' * ' first,use all DNR employees in ( `' — `'•nom '+ 4.}Vs'yet come into contact with Eura- =.._� 1- ,-, ,N..6 i Sian water milfoil but suspects it the field to identify where it is c`�,,� s f__ = ; has already ;taken root in occurring; second, educate the \\ t'° 'Y l`� ! r >(�t i� Chanhassen - public. ti*::: `�'� , t` ��"I'm sure it's probably there. `The best thing our agency' You have to believe it's been in- can do is try and inform the 1 . . troduced,"Johnson said public of the plant and the pro- y °� / r Johnson said he couldn't say blems it poses and ways of +�y whether or not the weed has disposing of the plant.The real I �Yf 1•. ��- �. already infested city waters key is public information. �-� Without voluntary help from the ` _=A because he hasn't been looking for it.Johnson said the annual public,we can't stop infiltration. i R +A', weed inspection he makes in The public has the biggest role Chanhassen and other Carver to play." County communities is geared Colvin said the public can help Eurasian water milfoil can be identified by the tiny,yellow flowers at its tip and by the reddish color of its I toward finding and controlling by: stem. i the plants on the state noxious *•Removing all plants off boats weed Eurasian —from weed reproduces mainly Threat: Wee_ d takes over lake ,, Eurasian water milfoil is not �from stem fragments. It only �'-��- on the list.With the exception of takes one four-leaf segment to A harvesting operation,which_ ding to LMCD figures. start a new hart. F page IA purple on the noxious all wof eed the P plants -a the noxious weed list •they have the DNR if weed at other the Lake Minnetonka Conserva- In addition the decrease in are non-aquatic. they have seen the weed at other of leaves to form a new plant. lion District (LMCD) current recreational use of the lake Johnson said getting Eurasian lakes. That reproductive capability fundraising effort, would slow would harm local people using eth causes water milfoil on the noxious #•Removing the weed from their the plant to form in large the spread by shearing off the that depend on peop weed list would give weed in- lake frontage by hand.This can colonies, which contributes to top five feet of the weed,accor- lak fo �tiorn. dollars," spectors more authority to deal be done in a small area without the large,thick mats on the sur- ding to Sardinis. a permit,but for large problems That would stop the spread in Strommen said. ' ; =t with the plant. He said purple face of the water. loosestrife's inclusion to the list, or for chemical treatment the These large mats are the root Minnetonka and to other lakes The need for only a small seg- along with state money to corn- DNR should be contacted for of the problems caused by the via boat props.. menu for the weed to reproduce I permit information. P However,since the weed can poses the danger of having,it bat it,has helped to identify and P weed. s read to other lakes. develop treatment strategies for •Forming a neighborhood The mats can become so thick grow as fast as two inches a day, P the aquatic weed. group to coordinate control ef- that they crowd out other weeds the harvesting must be repeated .."It can get lost on a dark spot _ ,t' Without the weed on the list, forts. Contact the Lake Min- by blocking the sunlight a short time later to insure the on a traitor or a boat, and as netonka Conservation District Y long as it stays wet it can Johnson said county inspectors nece�tary for plant growth,ac- containment of the weed. I don't have any authority to in- or the DNR for more cording to Terry Sardinnis, Once removed from the lake, reproduce,"Sardinia said. 5 "Bight to remove the weed. information. aquatic biologist for the the weed is excellent mulch anti d has posted signs boat Lake size has little bearing oh g Army r "Right now,it would be a volun- Corps of Engineers. material, according to taro thing,"Johnson said. how fast Eurasian water milfoil By crowding out the other Strommen. owners to check and remove Colvin said there are no ii- can take over a lake. ' plants the weed also crowds out In addition to causing recrea- weeds from their boats and mediate plans o get list is "It spread through Min- the production of zootplankton, tional problems, the weed can trailers before leaving the lake. water milfoil on the noxious netonka last summer so quick I the main food source for lake also cost lake area residents But the weed is so prolific and . weed list. He said the list is was surprised," Colvin said' fish thus stunting fish growth. money aggressive that it already may primarily for those plants that "The real key has more to lake In terms of recreation, the According to figures released have rooted in several of the pose a threat to agriculture.Col- with the amount of area of a lake mats can stall boat motors, by the LMCD, unchecked lakes around Lake Minnetonka, vin said purple weed list because is on vegetation can grow in, rather make the lake unsuitable for growth of the weed has the according to Strommen. the noxious weed list because it than the size of the lake basin." swimming and take over prime potential to shave$75 million off "I wouldn't be surprised if it is also poses a seri ous threat to Colvin said early detection is fishing areas. of the$1 billion market value of in the lakes around Minnetonka wildlife. critical. "The sooner we find it, The literal area of the lake, Lakeshore real estate. already,given the level of boat Eurasian water milfoil does the better the chances are of which the plant favors is the That translates into a loss of$2 traffic in and out of Lake Min- million in tax revenue, actor- pose some threat to fish habitat. eradication. The public could most pope lar area for, these netonka,"he said. But it's most serious threat has help us a lot in keeping it from recreational activities. to do with impairing recreation spreading." I . needs 550 000 by Feb. 15 to begin harvest program LMCD n $ Y I ding to Steve Colvin,an aquatic "We also have a harvesting spread of the weed,Jessen said. By parker Hodges lakes.netonka and to surrounding biologist for the ecological ser- operation,"said Kevin Kretsch But long-term solutions will vices section of the DNR. of Lake Restoration Inc.. "But not solve the short term need of Eurasian water milfoil, a Panelists es the meeting in- current lake users. .- µeed threatening the recrea- eluded representatives of the "The best way to prevent it is we prefer chemical treatment With the weed needing only a tional use of Lake Minnetonka, five task force agencies: the to stop it from getting into a because of the results delivered one-inch the seweedt e a new a was the subject of a pair of infor- LMCD, the Department of lake. If it is found, but not to the customer." plant,the spread will grow a manorial meetings held earlier Natural Resources (DNR), the established,treatment with her- mo�than 400 of the worked ed at plans a harvesting continue this month in Minnetonka and Army Corps of Engineers, the bicides on small areas can stop m Lake Minnetonka the last unless next west ng Mound. - Freshwater Foundation, and the spread. "Who knows mert the lake The weed's potential threat Lake Restoration Inc.,a private "But once it is established,as summer. has prompted the Lake Min- weed-eradication company bas- it is in Lake Minnetonka, it is Chemical treatments and would look like without a harvesting program,"it asked ed in Hamel. virtually impossible to harvesting are a good short- Terry harvesting aquatic asked (LMCD) Conservation a District am term way to control the spread, (LMCD)raise spearhead a cam- The task force is charged with eradicate,"Colvin said. Y biologist for the resources mien to raise money for equip- developing a management plan ven Chemical effective in hang pro- have to.long-term be mod through branch of the planning depart- weed.menu to control the spread of the to ment of the Army Caps of weed. the spread of the weed.The first spread. Colvin said, but the biological means — such as Engineers. The goal of the drive is to step,according to.Gene Strom- DNR is reluctant to allow developing a natural plant that Currently d estimated by - privately raise$550,(x)0 by Feb. men, executive director of the widespread use of chemicals in counteracts the weed atter- th Corps of it is the ,.ten ;<rn hiry the harvesters fighting the weed. . ,__. _,,._ ding to Marty Jessen,president inn t, Ma,t.e ,sse a., of the weed has f Engineers 5r0 to 1,the . , • Milfoil meetings will be telecast s • The continuing public interest in the problems and solutions for controling the Eurasian Water Milfoil infestation in Lake Minnetonka can be seen on region- -- t al cable TV,Saturday,Feb.4. The Southwest Suburban Cable Com- mission videotaped the public meeting held Jan. 7, where precentors from the U.S.Army Corps of Engineers,Minneso- ta Department of Natural Resources, Freshwater Foundation, Lake Restora- tion,Inc.and the Lake Minnetonka Con- servation District reviewed the accom- plishments to date and plans to control the weed. The Lake map showing shoreline af- fected by the weed brought a noticeable gasp from those attending. The recon- naissance work to locate the weed done by the DNR and Army Corps in the sum- , mer and fall of 1988 will continue this season for more accurate analysis. The telecast will beat 5:30 p.m.on Feb. 4 on regional channel 6.Those interested , in assisting in the fundraising effort may , , obtain an informative brochure and pledge material by calling the LMCD at. 473-7033. ; 1 I I I I I I - I I I LMCD seeks city donations to milfoil plan Shorewood LMCD representative sought from all 14 LMCD communities. Robert Rascop appeared before that Adirectmailinghasgoneouttoowners city's council seeking a contribution of Lakeshore property, said Rascop,and equal to Shore wood's annual LMCD several foundations have been aid contacted fees for the district's Eurasian water mil- eeut the be ojec. Ras the purchase of foil eradication program. ,�, Rascop said the contributions, about equipment to begin harvesting of the $9,000 in Shore.vood's case, are being weed this spring. II I I I I I IlY ,4011,11. I ,ur.,n`.,'_"T ` LAKE RESTORATION, INC. . a�c.0:ra�ecr n Professional Lake Weed Control I I 7 i •lii V ? 575—",..-:s---j Y_ ‘''5 ":5"-e?' ..._ I //.•-0'-f-ca. ; (7r _� I i; �-- �e/� I I .,:e....... ..:____.... - , I rr,4 i I .u,oanea: i I Kevin R. Kretsch 3 PRESIDENT Op K.R.0 LAKE RESTORATION,INC. 1 620 Hamel Road Hamel,MN 55340 (812)478-9421 1 1 1 620 Hamel Road Hamel, Minnesota 55340 (612) 478-9421 1 ' EUJ2S12H How does it grow and spread? IEurasian water milfoil Is a perennial herb,water• growing on the bottom of lakes and streams ' Mdfoii from a fibrous root system. During the spring and summer months, rapid growth from the root crown area produces reddish shoots that may reach the surface and flower in water from I the shoreline out to a depth of about 10 to 15 feet. Dense populations may occur on a variety of bottom types, including silt, sand and even gravels and broken rock, making most Minnesota 1 What is the problem? lakes susceptible to nuisance growth of this plant. Most aquatic plants are an important part of the 1 ecology of our lakes and streams. They provide Waves and human disturbances such as boats, food and habitat for many organisms. They also boating equipment and water skiing produce help to stabilize the bottom and aerate the plant fragments which are spread rapidly by water. But when weeds-are too abundant, they water currents, making the plant difficult to I can upset the natural ecology and interfere with contain. New plants grow when the fragments t. This form roots. Though it roots best in protected our aesthetic and recreational enjoyment usually happens when the weeds are over- areas, the weed can also thrive In river channels. fertilized by nutrients provided naturally or by Weed fragments can hitchhike on boats, trailers, human activities in the watershed. weed harvesting equipment and other vehicles and be transported from one lake to another. Sometimes, however, weed problems result from Thorough cleaning of all aquatic equipment is ' the introduction of an "outsider," a plant for the best way to help control the spread of which there are no established natural controls. Eurasian water milfoil. Eurasian water milfoil is such a plant. First observed in North America in the early 1940s, I Eurasian water milfoil has spread rapidly across the continent. In Minnesota, it was officially identified in Lake Minnetonka in 1987 and Its I spread to other Minnesota lakes has already begun. 4, Eurasian water milfoil i v ,; ��i f. ,, f = causes many problems: If, ��,. -_ • Swimming, boating, water skiing and fishing ,/� � ` �� ■tip__ are all adversely affected by dense growths. /./ 6�� ��� \ \ N. • Existing colonies of more desirable plants are �l- i� Invaded and replaced. 1,1,....-...x.;\ • Plant fragments which wash up on shore make beach areas unappealing. �__�� • Luxuriant growth can affect flood control, 3 irrigation, drainage, water treatment facilities I —� `� = / ` , _ and fish spawning areas. X1�o I i,� ■� /� �j/ '_' • Eurasian water milfoil is costly, particularly in 1 v (14 `��_��` '� areas reliant on recreation and tourism. `\Vp y \`'` �-- • Mats of vegetation formed by the weed are t / '_ ideal breeding areas for mosquitoes. What can ince -Jiduals do? 1 Lakeshore residents should attempt to clear �,• weed fragments from their beaches before roots develop. Fragments must be removed I ,f •- from the water and disposed of away from the �� _ lake area. The weeds can be composted and ��� ���^ used as mulch. I Treatment for aquatic weeds in areas more than 2500 feet square requires a permit from the I How can Eurasian water Minnesota Department of Natural Resources. Businesses that operate mechanical weed milfoil be controlled? harvesters or apply aquatic herbicides must be licensed by the state of Minnesota. Use only I Eurasian water milfoil is'difficult to identify herbicides that have been approved for use in because it closely resembles native water milfoils, lakes and always follow package directions • However, early detection is important because exactly. Intensive control directed at small colonies Remove and properly dispose of all plants and I during initial stages of growth may reduce both plant fragments from boats, anchors, propellers problems and treatment costs. Eurasian water and trailers after removing them from the water. milfoil is virtually impossible to eradicate once it I is established in a lake or stream, but it can be Though localized control may be achieved by controlled.A number of management techniques are available. Which method is most appropriate pulling weeds or using bottom barrier materials, in a particular situation depends on factors such more serious problems require a community I as the characteristics of the water body, the approach, such as a lake association, watershed human and economic resources available and the district, neighborhood group or local total management plan for the lake and its government. watershed. Aquatic weed management I methods include: Public information / t-;h'?_ Harvesting , _ • I Bottom barrier applications :Air Granular herbicides �/ Root removal ( I• Lake drawdown (: 1 //- ! `,i 'I iii- i:2.- /.4 viditd.A.,..e.L---;:- ...::: r I • i • /1- ?� I ...`.>,";-/- \ / poilpz, -� ,/_ / ,-, , A '. . 0.i / I ts •4i C ll J I F `•i ` \ i /.%;/ '.!7. Where can more -�� information \ \ - be obtained? For further Information on lake protection and 1 Freshwater management, contact the Freshwater Foundation, 2500 Shadywood Road, Box 90, Foundation Navarre, MN 55392 (612/471-8407). I . /1 /' Some Nuisance Aquatic Macrophytes r • I 11 • � • 1,.viS;i I 4L6�1 i1�' Ai{ im,• ,��r a i ` --.-...v. _ r ;•fi. '.,N f/ _\; _ f; 'A1A► 1W' e 14. \f� I M ai / ��(•,jb.l' rl_ c N' \\ -1 6\eLoxr.;,-, -A■_ or,VIII ,; /(le _1r,f;041, (-AV wgr C . 4 s */ y- • /, -_ IL .3.0,1}‘ -;.--- • ---7-. f t I ....44 - / .... ;,,,,., :_.. , . ,, !� /,�/``�''� ifi - ;�, • •A:'-, ‘\\ ik-41,..r.(1:00-- i'ifn k`\ ' ,,/.. ...--'-' -`-`-'2.: fa) , �I ' � ,:•lib, _. �' i r q ,,. \-' \ :a 11 `1 N' sthilltnalinhildiolli Myriophyitum spicatum L Eurasian watermilfoil. A, Habit—x 0.5; B, Whorl of leaves—x 2; C.part of flower spike, with pistillate flowers below and staminate flowers above—x 4; D, immature fruits—x 4; E, mature fruit—x 4. 1 From: Reed, C. F. and R. 0. Hughes. 1970. Selected Weeds of the United IIStates. USDA Agricultural Handbook No. 366. Washington, D.C. II 1. EURASIAN WATER MILFOIL. DESCRIPTION, HISTORY 1 AND EFFECTS Eurasian watermilfoil foil has gained notoriety for causing nuisance conditions in many North American lakes. Native to Eurasia, this plant was introduced into North America in the 1940's as an aquarium plant. Since then it has spread to 37 states and two Canadian provinces. Eurasian watermilfoil grows quickly, up to 2 inches per day, and because most of the plant growth occurs near the water surface it can form dense, impenetrable surface mats. This plant can also quickly infest a lake. The main method of reproduction is by fragmentation. Plant fragments can be transported by surface currents, aquatic birds, boats and the like to other areas of a lake or to different waterbodies. There the fragments regenerate to form new plants. Eurasian watermilfoil can out-compete many native aquatic plants and become the dominant species within a few years of its introduction into a lake. Because it grows readily and forms dense surface mats, it can seriously impair I recreational lake activities like boating, fishing, water skiing and swimming, and is also considered an eyesore. The best way to control Eurasian watermilfoil is by Y preventing it from getting into lakes. The best way to accomplish this is by removing plant fragments from boats, outboard motors, trailers, live wells and anchors before leaving an infested lake. If Eurasian watermilfoil is found in a lake but is not yet firmly established, it may be possible to eradicate the plant by treating the small infested area with a systemic herbicide that will kill the entire plant, including the root system. Once established, Eurasian watermilfoil is nearly impossible to eradicate. One option is to confine the plant to the current infestation area, and attempt to limit its spread to other areas of the lake. If, however, plant distribution has become widespread throughout the lake, the best management strategy is to control plant growth in public use areas, by mechanical harvesting or herbicide treatment programs, to enable continued recreational lake use. ' Steve Colvin, Aquatic Biologist Department of Natural Resources 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11111 11111. „,. 11111 — LAKE MINNE•TONKA • r ' • "111!!:4,1 : ,, Ailliiiiijitill. b . Q .t� k C?' OCCURRENCE 1988 • illir OF EURASIAN MATER MILFO-L, BASED ON OBSERVATIONS BY LAKE :tESTORATION AND BRAD STANNnRD OF MINNETONKA SEAWEED EATER:, MINNESOTA DNR SITE • INSPE=TIONS, AND A CORPS OF 0 ENC.IN"ERS/DNR PLANT SURVEY. c • RECEI%/ . OCT 27 1988 LM.C.D. • PROFESSIONAL EMERGENT WEED CONTROL - I Cattails I ,� , r I'r; ''I iett p Y'*.,.•""x'.›,*-:,"'Ir4 v,jUI; *1':PI , -1,-.;,.; t ,A,..„_,. }S '-.� . . {`-:1.- t I*1+t} 1 y'7f� ,p■ F._xvil ., - ..), . y4,}19.- _1 ' 1i' 4,, .}i �� °, - t o.!"� vT`�',}� � a., �▪} Sf Y-.Ct r ? » • ; ?-rt `i L'?,.yai ..RC.�.;r�V .' '.,R,� 4•14� * ; , 4`r,,-i` _ 't• ",14. t,Pr'.1.- y,, s5.li .,,Ss.'•r ala i .; F.,.i;* :y..%,:-.,,,,,f• st t S J, ` _1- F A,'. °` `.•I: S;�{• ,4 is.-{ t� ,.. �TT ?.� ;5 fGr c�„ar ' �:= ,��.s1',` §.ti s�h�.l. ' ;t a,W tt ' 'va' iqq�,aY �:. � � 1-tl F sT, - -, , -.•'.n, }ti s, k:.;�});∎,:'":�.:'-::„ ''\ „ �,,i ci =ISlA. .l� 4,1 ` .s?7�It 1 A'0 E .i .'t i - s{c Ita i +�.. '- s i ,2 � t.54 } ,T•4 T• " r) 41... �r A i,? �� s` y�3 tr t� f��s v�`., ask� �. y q,t ^, .ris �'� ,1 _�7 �� �:5�� 's', f F �, � r I �n: `4C'�2 '\.�����_W�!! ,� �a� _(�3vt1t �v t� i Ati l 'J' rNyF t'�#r'la, -ty t t *-`'. ;G s 4 ��,' -w SI .kt t S - t i S t s y . `�y`l'., S "k- _ 1 V i° t •vY;a..▪ �+ a j a r. l I l� a r. z 4 t I t , a { I.+ s'' FI 1:, t .`IZ i t L ttt v .A,'Ai t'� t,.� t - ,It ir `, ' l Ii✓ tl f,,,.., , .., ,�,i ,, t' Y., ., ,.. H l �\� �( 1 �v i �c �i 1,�(`, F. jj .- =ms `{ Ft Af ■t� • I fC d l -�."._� - �d3 _.• ,\� ��� I�,,._ st:4,t.i7:f; 4 4 I Lilypads ..., ,- _ - _,acr' A < t-, f . ".7 I. r.a � 3 - . 1 ..4 4 r +' '4\' v - ♦i s r-# s'_ •--._= a } ,i, s „ z —, ,_ ,..•:.... „...............„,i \. .. L. r „' Lj .__ray '��'',�^�,T �,;,a�.. .-,- ,-�"``�>_�.".���"'-` '•'-`rt. • ,? .....'-.:' A: , r�1 f- a �t --'1,"° 2 mat . ` -s '' - a '" ' 4 ' x €c _ti • ;f• �c � me e S i-°- 1 ar E �,[ a q: Reeds and other Emergent Weeds BENEFITS RESULTS I • Increase the value of your lakeshore property An August treatment will provide long term results.Approxi- • Enjoy the aesthetic beauty of your lake mately three weeks after treatment,the emergent weeds will turn color and start to decompose. Very little new growth I • Swim, fish, and boat without the nuisance of emergent should occur in the treatment area the following summer. weeds Depending upon how fast emergent weeds spread from un- treated areas,three or more years of control could result. PROGRAM One treatment is made in August after the emergent weeds LIMITED GUARANTEE have reached full maturity.An aquatic herbicide approved for If you are not satisfied with the results of the emergent weed use by the Minnesota Department of Natural Resources is treatment,contact Lake Restoration the following summer to used in the treatment. receive one retreatment in August at no extra charge. CALL LAKE RESTORATION FOR A FREE ESTIMATE OR SIMPLY RETURN THE ENCLOSED ORDER FORM IN THE ENVELOPE PROVIDED. I LAKE RESTORATION,INC. • 620 HAMEL ROAD • HAMEL,MINNESOTA 55340 • (612)478-9421 District Offices 00-riCro4, 473-7033 Its lurking 0 t' LAKE MINNETONKA Ar164° beneath the CONSERVATION DISTRICT waves. . . I . .•. . • • "Save 77se Lake" . • • EUGENE R.STROMMEN 402 EAST LAKE 4 Executive Director WAYZATA,MINN.55391 0 :v Net , ' • - . _ y, .„ t4... • - ',•4 • Wr dije• • •-• '?1Ca-. •• • r- *Mt. _•■111/:•• ' " • 1.:"Vr•-•••■••%01.R.: •1'. k4•11.5,4W.:11L ..."`e%'-e-9.11k:4'; . • iityS7V4y. • ;...4154V J:17- :121.• 41V- e : -17 1.•:4::"•• - • " • „.. 7•1.! • V •-•47;.'"•411er':4•"'"w!•: : -4r4r4v-- . ow*. • ..,:apte;•• • • Help • . oftEurasiamWater Milfoll, Af= . • 6, • , . 410,. -- i.eurn iu taenrtry - - — Control the growth of Eurasian Water Milfoil. established • Long,leafy stems with 1 Eurasian Water Milfoil. many branches. sia • Because this weed grows quickly,and iii Feathery leaves in 4's on the stem. �' regrows from small fragments,control after infestation is difficult. But there are some ���,� ;�; things you can do. ;`" 4.J i_ 7 Remove the weed from your lake >j// tq;. /;.r, �� i<< / i / i t,� ��/; 1 ` ,1/�.' frontage by hand.You may do this on a ,. r .. ,,,J ' I / r,. ; small area without permit, but for large _�1 �� problems or for chemical treatment 1 •�� �/ l.�l % ; , �iy/�•r� contact the DNR office listed below for �( / �,,t �i ( permit information. NIT) t awl /� `�/��� _. ' ;' 1 �t� �► % �` 9- �;� a� ■ Form a neighborhood group to I1 ^ it--Y4 \ ;r /∎� /�/_ g 9 P it--j ,.�� .„- /,_ /� l coordinate control efforts. Call the \, / /, Lake �t Minnetonka Conservation District office --%-\\ ,_ ,,, .y, — our combined efforts are needed to 1 ,�( �� / 1i_ -(=�� \' �p �� control growth and stop the spread of •_�� �, � �i� -4- �\ l (i' Prevent the spread of Eurasian Water Milfoil. 1 '��'C0' ` �\ • Give us a call. We're here to help Eurasian Water Milfoil. p you -‘k--41i ,,! with identification of weeds, information t ..�; ./ ��--� • Remove all weeds from your boat, on control methods and listings of \\,----- t ( / - motor, and trailer before you leave the approved professional weed control * �t lake. Dis ose of the weeds well away services. / t3 from the lake, This plant reproduces Lake Minnetonka Conservation District-LMCD \ ;:_ j\a tr, . Nu,� r-c- mainly from stem fragments. Only one 4- 612/473-7033 -- ` /•,1\ , '. yIC `� leaf segment is all it takes to start a new 402 E.Lake St.,WayzaTo,MN 55391 //\ ` plant. Freshwater Foundation , 2500 S adywood Rd..Box 90,Navarre,MN 55392 // �, wet well MN Department of Natural Resources-DNR,Water Resources _..�i,�p� 612/296-2835 = 500 Layfayette Rd.,Box 25,St.Paul,MN 55155-4001 ■ Each leaf is very feathery,with 14-16 -_�� - i pairs of leaflets. Its native cousin Northern hitch rollers e/ rollers s Water Milfoil has half as many leaflets. If motor/propellor in doubt,assume it's the bad one. 0. NEINNftO'Y • As the plant matures,it sends a flower • Avoid using fertilizers on lake frontage 49 stalk above the surface. Look for a lawns. Keep fertilizers off pavements that • ©\ • reddish stem with tiny,yellow flowers. may drain to the lake. no -___- __ ,. '1, =SAYE 1-_NE LAKE .` • Show your family and neighbors how to ■ This is a state-wide problem. If you think s`�"O�rEOn ��y�� identify Eurasian Water Milfoil. Examine you see Eurasian Water Milfoil at other your lakeshore and boating areas lakes,please call the Minnesota regularly during summer. Department of Natural Resources. Our beautiful lake has been invaded by aliens! No, not by little green men from outer space, but by a green aquatic plant. Eurasian Water Milfoil is a foreign mater weed that has grown explosively several Minnesota lakes. Youshould learn .r to recognize it and help prevent • spread. Most water plants are a vital part of a healthy lake: the foundation of the food chain that supports our game fishery. But problems sometimes result when a new plant is introduced to a lake. A plant for which there are no natural controls. Eurasian Water Milfoil is that kind of plant. To make make all weed growth entering matters worse, ° the lak wth more abundant. Eurasian Water Milfoil weed mats on the surface are unsightly and: Decrease swimming, oating,water opportunities skiing and fishing a Replace more desirable native plants ■ Mess up beaches with plant fragments a Lower property values a Foul boat props a Breed mosquitoes in floating weed mats We must control the spread of Eurasian Water Milfoil and limit nutrients entering the lake to maintain the beauty and recreational value of our Lake Minnetonka. Here's what you can do to help... • - -- _..,,--Li - . =.."..-- -77._,::1-':. _= Z•-•-••:. ' --=,-,7•-•--- 4-•- '7;Z::-'2-- * -.-5.-7'- - s ...:',;•-• ....n.,.f --,' 't:r -,_.72_..z..- , "7_,',... .s.y — Preserve the Value of .,... .--,.-,4.!.1.:1---....„- -_-,-.N ,,,. -..,,,,, - „......-:.-- --- --- _..,, :-.,---.7-- -,p-,-- ---.-.-- --z- -- , _- - ---_,. ..--.Y''''' ,t ' 'r-. "''.%'.. ' .- ---.7 - -11-A.'' ..:, , ••*-- - 4-- * -.--., -..-•,"-,...„.=--•''' - - vi.,•,. .,-----'r.---'e r r_,--`44's..:!--": ......-:‘,.•'"- ., ' , , -.- * --1. ----` ''' ore In aayM.More Professional r„..---:.f.'::::- .,. -"fee --I. ,_,t,,,..•.,.,-. ..---- - = - - -- .., _,,,,, , V:‘,-; '...-:"' ' .1.- ' '--- ,,Ntk -- 4...-7. 7;"* .,.■ -.*-NIP MeV. . ' _-- Your rLoafkessh sion al ... . '.1-; y_ - - 1f _ . -.7,...-/- :'-.-----;-;r ,,...z,...„,- .----- ,..--i■-•-r_4.C5__,.:v•''- - - . • BENEFITS RESULTS it • Prevent weed infestation and sediment Each treatment provides 5 weeks of weed control. buildup. The two treatments provide summer long control. OPTIONAL BENEFITS • Swim, fish, and boat with weedless ease. The following services are also available: • Enjoy beautiful Lakeshore. 1. Swimmers itch and shoreline algae control. 2. Cattail,reed and waterlily control. PROGRAM SAFETY Two treatments for submerged weeds are made with The herbicides are approved for lake weed control aquatic herbicides applied below water. Treatments by the Minnesota Department of Natural Resources. extend from shore out 100 feet. Aquatic herbicides when used properly are not 1. First treatment in June, harmful to fish. 2. Second treatment in July. SIGN UP TODAY Simply return the enclosed order form in the enve- lope provided. JOIN OVER TWO THOUSAND HOMEOWNERS ON 56 M � k 7 � �r4*r ey` tam`_ -4- •' � - � _°' i- r• `.-.,a "ar- "ta-T - _,.. •r',_.y� »s -i=' `' , ,'i s..''''A'''''•> " `' Tai ti,-.. ,. � i„` ' , ,k' ,. ° I.. - I - . '�' ,.7:,z'. jE. 7_ 4 x -it 4-,Y t ''��_ �: ? • .�4 - + '-:;;;;:;;; .....4:- "-` r"�. Yet5 • „■. ,, yr saucf <.V r - 14. ., =,,s c a e s.e x3,4 . f - a.s c a x' r + s ' l.P a -"om r r lx 6.'' +y,,,. c�"„— , . •i ' *7 . z 'mac:_ -,:',' -4„,.'-':;,z'7,--44:- s7...-.' '; -" .1' ,, *. t,..-_,'StF.d .< w � f ' t i 'x'` a .Y"4a+ x Fs s '� r '' ”' . k P . : .,+ n s U'F 11> . r. k , rs5 re ' `' ` * -, -�, aK -' N= ,;.=,'..--_- : " 'a_o+► :-..----,.!„:-..z--,.- +.wY+o- s e "» +e 77 '?�1' p;, s"' ,� - L „!"' -srn ,. •r" } ,#-V - ...,, ..,1'_ ^-4,,, ts.7 7,. ,- " / ,_ #s _- .a- x - ',., ::: i t '.. . .s. . ;V-mss';.''',..1r:7-:_=`' {-..z.1_ ,f.,--.4 v ."'" .r a s . 7 r y -?--,= �',..,tG r a F"`""a' . YD-' 'r ;+h�." , M ` n�#i'-s�uv : -';'• k �.` -..—'=`�"ti .4ws. r i-Z--, + v.Lr !' • .•+*��+ '- Y `yl•. Yti: w b`".sa..., _ r lv te'` " ENJOY YOUR LAKE. " b s ENJOY YOUR SUMMER. ..."4".'4' '":"-- "Summers on Lake Minnetonka are more enjoyable both �� " recreationally and aesthetically thanks to Lake Restoration." H; ^ ., " A. A. h c us, -qn�s�%- -• rs ;r:<,,: Crystal Buy,Luke Minnetonka ` t , .. "Lake Restoration has worked with us at Weaver Lake in Maple > ° Grove for the past two years in a weed control program,and the sA.. _.�� effects have been very successful." x its Mr,. Porter Hit;hv, r 1 _ ',5. Weaver Lake a r; - LAKE RESTORATION, INC. i. "`� Sign up 110711 620 Hamel Road b Hamel, Minnesota 55340 -..4 ; 6124789421 t • .. ��-- -r ,,,� - '