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Re:weed control and herbicides
- To: aquatic-plants at actwin_com
- Subject: Re:weed control and herbicides
- From: Bill Wichers <billw at waveform_net>
- Date: Wed, 21 May 2003 15:09:02 -0400
Time for some stupid questions....
Being totally ignorant about algae and unwanted plants in natural waterways,
I'm asking myself what is causing the problem in the first place. Is it
fertilizers and other contaminants that we are dumping into the waters or
letting leach into water ways that are the cause of these problems? Is it
native plants/algae being introduced into eco systems where they would
otherwise not occur naturally? I'm sure it's not a natural occurance right?
Is it too expensive or too late to do anything about fixing the source of
the problem rather than resort to temporary solutions which some sound
nearly as bad as the problem itself?
Probably a combination of runoff AND non-native species, but it depends on
the local. In Michigan we have problems with milfoil, which is a non-native
aquatic plant that looks a little bit like Cabomba. It was introduced on
traveling (as in between waterways) small boats. We have zebra mussels too
that are causing all kinds of problems, and they were brought here on the
hulls and in the holds of long-distance commercial shipping.
In some cases the problem is that there are so many native plants that they
interfere with surface craft and then you get groups that want to treat the
water or trim or dredge. I know from experience with a local lake that the
chemical treatments, while more effective at making the "lake look like a
swimming pool" (these are not knowlegeable people in a lot of these
groups), but the fish population declined. In the years when "mechanical
deweeding" was tried (basically an underwater hedge trimmer that prunes the
plants down several feet), the fish were much healthier but the people
could see plants where they wanted to swim and didn't like that.
UNIX Systems Administrator