re: Giant Sylvinia - Is ther a way to control this stuff?

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I also suggest weevles. They wont have immediate impact, but they will kill it all over a long time frame. This stuff is terrible, almost ruined our property in bayou black.

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I think I heard the weevle won't work as a long term solution on larger bodies because they die off in the cold weather. The spray will kill it but unless you are constantly spraying ($$$$$$$$), it will be hard to kill it off completely.