Quote:
Originally Posted by jpcajun
We have a marsh and cattails have been a big problem over the past 13 years. We spray every year and have tried different chemical formulations throughout the years with different active ingredients. I have found some glyphosate formulations work pretty darn good.... Rodeo, Aquamaster and Touchdown work well. I have tried imazamox with an aquatic surfactant and got nice results as well... I think we used Clearcast. Used Habitat as well and got nice results but it doesn't do well on duckweed and watermeal. What we find works is an initial application of Habitat and then manage with glyphosate and 2,4-D and we have been managing our marsh like this for 3 years...going on 4 and it looks nice.
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But you aren't trying to kill duckweed though right?

Glyphosate is one of the 'safer' chemicals to use as long as what brand you are using is wetland approved. It will topkill many of those plants but not likely to kill the extensive rhizomes of plants like cattails and sawgrass. It may be a pain to apply every year, but other more desirable plants can grow in the voided area. And its relatively inexpensive as there are many generics to choose from so may make it more cost effective. Imazapyr is great in certain applications, but its nondiscriminant in what it kills and keeps on killing. Imazapyr is often what you see used when an area is clearcut and along rights-of way when its prime growing season and everything is green except those areas