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dc.contributor.authorThum, Ryan A.
dc.contributor.authorParks, Syndell
dc.contributor.authorMcNair, James N.
dc.contributor.authorTyning, Pam
dc.contributor.authorHausler, Paul
dc.contributor.authorChadderton, Lindsay
dc.contributor.authorTucker, Andrew
dc.contributor.authorMonfils, Anna
dc.date.accessioned2019-01-25T16:18:02Z
dc.date.available2019-01-25T16:18:02Z
dc.date.issued2017-07
dc.identifier.citationThum, Ryan A., Syndell Parks, James N. McNair, Pam Tyning, Paul Hausler, Lindsay Chadderton, Andrew Tucker, and Anna Monfils. "Survival and vegetative regrowth of Eurasian and hybrid watermilfoil following operational treatment with auxinic herbicides in Gun Lake, Michigan ." Journal of Aquatic Plant Management 55 (July 2017): 103-107.en_US
dc.identifier.issn0146-6623
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/15159
dc.description.abstractEurasian watermilfoil (Myriophyllum spicatum L.; EWM) is an invasive aquatic plant that is widespread in inland lakes of the northern tier of the United States. It is commonly managed to alleviate negative economic and environmental impacts, including the formation of dense stands of submerged vegetation that extend from the lake bed to the surface, impairing recreational uses; affecting water movement, nutrient cycling, and sedimentation; reducing property values; and potentially altering habitats used by native species (Smith and Barko 1990, Zhang and Boyle 2010). Management costs of invasive aquatic plants in the United States can exceed $100 million annually (Rockwell 2003, Pimentel et al. 2005). In Michigan, where the present study was conducted, roughly $24 million are spent annually on herbicidal control of aquatic invasive plants, much of which is focused on EWM (MDEQ 2013). The auxinic herbicides 2,4-D and triclopyr have been used extensively to selectively control EWM (e.g., Getsinger et al. 1982, 1997, Parsons et al. 2001, Wersal et al. 2010). However, herbicide treatments do not typically eradicate EWM from lakes. Even when control efforts result in undetectable levels of EWM for months to years, reestablishment of EWM commonly occurs (Netherland 2014). The source(s) of regrowth following auxinic herbicide treatments are unclear. It is possible that regrowth occurs via reestablishment from untreated area(s) of the lake or from other lakes. Similarly, it is possible that regrowth occurs via recruitment from a viable seedbank, as EWM can flower profusely and produce viable seeds (Hartleb et al. 1993, Xiao et al. 2010, LaRue et al. 2013a). Alternatively, regrowth may occur from treated plants that are not completely killed, such as sprouting from root crowns or axillary meristems on surviving shoots. Distinguishing among sources of regrowth when assessing herbicide treatment efficacy could be important for informing decisions about management strategies and/or site-specific tactics. For example, if regrowth occurs from seed, management strategies should include tactics to reduce seed production and/or exhaust the seed bank to improve long-term control. If regrowth occurs via fragment recolonization from untreated areas, different spatial management strategies may be required. And, if regrowth arises from incomplete kill of treated plants, then different herbicides and/or application patterns may be required. However, in our experience, monitoring of the source(s) of regrowth is not routinely included in herbicide evaluations of EWM. In this case study, we monitored quadrats established in treated areas of Gun Lake, Michigan, following treatment by auxinic herbicides. Our goal was to document the source(s) of regrowth throughout the remainder of the summer season following herbicide treatment, and into the following spring before the next management cycle began.en_US
dc.description.sponsorshipMichigan Department of Natural Resources Invasive Species Grant Program (IS14-2009)en_US
dc.language.isoenen_US
dc.rightsCC BY, This license lets you distribute, remix, tweak, and build upon this work, even commercially, as long as you credit the original creator for this work. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/legalcodeen_US
dc.titleSurvival and vegetative regrowth of Eurasian and hybrid watermilfoil following operational treatment with auxinic herbicides in Gun Lake, Michiganen_US
dc.typeArticleen_US
mus.citation.extentfirstpage103en_US
mus.citation.extentlastpage107en_US
mus.citation.journaltitleJournal of Aquatic Plant Managementen_US
mus.citation.volume55en_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentPlant Sciences & Plant Pathology.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage3en_US


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CC BY, This license lets you distribute, remix, tweak, and build upon this work, even commercially, as long as you credit the original creator for this work. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.
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