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« Reservoir Hydrology Discussion | Main | Finally! »

June 18, 2007

Comments

ramman715

does anyone know the reasons why the D.N.R. is killing off all aquatic vegetation ( weeds ) in the strip pits at minnehaha F.W.A. i can't get a straight answer.

Big Indiana Bass

Hello Ramman715 and welcome to the site. I went back and reviewed all the L.A.R.E. grants that have been issued over the past decade (LARE grants are frequently used to fund weed treatment projects on public lakes) and there were none listed for Minnehaha. This would suggest that if there are weed treatments going on, they are probably locally driven and funded.

Usually there are just a few common reasons why they would treat for weeds. One is if the weeds were heavy enough to obstruct and restrict public access and usage. Another would be if the weeds present are considered invasive such as Eurasian milfoil, the most commonly treated weed. The other that comes to mind would be if the weeds were overabundant to the point of hindering fish populations. Usually anything in the 15-30% coverage range is considered acceptable. If more than 30% of a lake is covered with weeds, predators may start having difficulty preying on smaller fish such as bluegills. Subsequently, the bass growth would be slowed and their condition would suffer. Also, the bluegill would tend to have high recruitment and you'd end up with lots of little stunted bluegill.

One last thing to consider would be the possibility that with the extreme drought and hot weather this year, it would not be too unusual to have the weeds die off late summer. I've seen this happen frequently at Monroe over the years.

I'll keep looking around a bit and see if I can find anything else out. If you know more or want to tell me who you've spoken to so far, I'll follow up a bit.

ramman715

thanks for your responds and answer to my concern, never thought about it, in the way you presented the information. its been a long time since the last time i actually inquire about weed sparying at the pits. at mohawk for example the last time there was weeds present was at least 7-8 years ago. yes, i am new to this site, found it a few weeks back, sure glad i did. i been fishing bass at these pits since 1996,and thats how long i been fishing for bass using artifical lures. thanks again

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