[APWG] FW: Myriophyllum aquaticum

[Parsons, Jenifer (ECY)]

Re: Does anyone have any firsthand experience and/or recommendations as
to control of M. aquaticum?

 

We've spent the last 10 years looking at control programs for
Parrotfeather. Can't say I've found the perfect solution. Most
herbicides (foliar or in-water)  do a  decent  job of knocking down the
above-water  foliage, but regrowth in the year of treatment or the year
following is normal. Our most consistent treatment has been imazapyr @ 6
pt/ac  followed by glyphosate for any regrowth that season (may required
>1 retreatment).  By repeating this sequence for several years we been
able to eliminate it from most waterways. However, it takes a time and
consistent treatment follow-up.   

 

Kim Patten

Extension Specialist, Professor

Washington State University Long Beach Research and Unit

2907 Pioneer Road

Long Beach WA 98631

Office Phone & FAX  360-642-2031

Mobile Phone 360-355-7864

email pattenk at wsu.edu 

 

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