RichToyBox wrote:
A few years ago the horticulturist from the National Aquatic Gardens in DC
said that Roundup could be used to control lotus in a mud bottom pond. I
was always leery of this around ponds for fear of what it might do to the
fish. The link to the MSDS shows that it is nearly non-toxic, and the
overspray from the spraying would be diluted quickly.
http://www.mindfully.org/Pesticide/M...SDS25jan01.htm
An article about Ireland's control of reeds along canals and waterways, link
below, states that Roundup is one of only two herbicides used.
http://www.cfb.ie/research/aquatic_p...al_control.htm
It would appear that Roundup would be one method of taking care of your
cattail problem.

Only if you have no children, don't expect children to be in or near the
pond, or don't plan to have children in the next ten years. A recent
study linking pesticides and herbicides (including Roundup), links
exposure to a myriad of disorders including autism, attention deficit
disorders, birth defects, etc. (released by "Garry, VF, Harkins ME,
Erickson LL., Long-Simpson LK., Holland SE and BL Burroughs. Birth
Defects, Season of Conception, and Sex of Children Born to Pesticide
Applicators Living in the Red River Valley of Minnesota, USA. Env Health
Perspect Supplement Vol. 110(3) 441-449 June 2002")
See:
http://ehpnet1.niehs.nih.gov/docs/20.../abstract.html

--
zookeeper