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Herbicide Control Strategies for Ventenata dubia in the Intermountain Pacific Northwest

Published online by Cambridge University Press:  20 January 2017

John M. Wallace  and
Timothy S. Prather
John M. Wallace*
Affiliation:
Plant, Soil, and Entomological Department, University of Idaho, Moscow, ID 83844
Timothy S. Prather
Affiliation:
Plant, Soil, and Entomological Department, University of Idaho, Moscow, ID 83844
*
Corresponding author's E-mail: jmw309@psu.edu
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Abstract

Ventenata dubia is an exotic annual grass that has become increasingly invasive in various perennial grass systems throughout the Intermountain Pacific Northwest. Currently, little information is available to landowners about herbicide control options. In our first field study, we evaluated V. dubia control efficacy and perennial grass tolerance of herbicides applied pre-emergence (PRE) at two locations and as an early postemergence (EPOST) application at four different conservation reserve grasslands, with each grassland dominated by different perennial grass species. Treatments included flufenacet plus metribuzin (303 + 76 g ai ha−1 [0.27 + 0.07 lb ai ac−1]), propoxycarbazone-sodium (49 g ai ha−1 [0.04 lb ai ac−1]), rimsulfuron (53 g ai ha−1 [0.05 lb ai ac−1]), sulfosulfuron (53 g ai ha−1 [0.05 lb ai ac−1]), and imazapic (105 g ai ha−1 [0.09 lb ai ac−1]). Rimsulfuron and flufenacet plus metribuzin applied PRE provided > 90% control 10 mo after treatment (MAT). Rimsulfuron and sulfosulfuron applied EPOST provided > 90% control 9 MAT. Herbicide injury to bluebunch and intermediate wheatgrass was negligible across treatments. Imazapic and sulfosulfuron applied EPOST resulted in significant injury to smooth brome and timothy. In our second study, we addressed the following question: Will fall herbicide plus fertilizer treatments improve V. dubia control compared with herbicide treatments alone? We imposed fall herbicide treatments in main plots and fertilizer treatments (fall N, fall P, fall K, fall PK, spring N, NPK) in split plots at three study locations. Herbicide treatments resulted in high levels of V. dubia control. Differences in V. dubia abundance among fertilizer treatments were negligible 9 MAT. Within herbicide control plots, spring N and NPK treatments resulted in significant increases in perennial grass cover and decreases in V. dubia cover (9 MAT). This result indicates that spring N applications timed to the onset of perennial grass growth could be utilized as a component of an integrated management strategy for V. dubia in invaded perennial grass systems.

Keywords

Flufenacetimazapicmetribuzinpropoxycarbazone-sodiumrimsulfuron, sulfosulfuronventenata, Ventenata dubia (Leers) Coss. VENDUbluebunch wheatgrass, Pseudoroegneria spicata (Pursh) Á. Love PSESPintermediate wheatgrass, Thinopyrum intermedium Host THIINsmooth brome, Bromus inermis Leyss. BROINtimothy, Phleum pratense L. PHLPRFertilizationintegrated weed managementinvasive plants
Type
Research
Information
Invasive Plant Science and Management , Volume 9 , Issue 2 , June 2016 , pp. 128 - 137
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address: Plant Science Department, Pennsylvania State University, University Park, PA 16802

References

Literature Cited

Arora, A (2009) Effect of soil moisture on persistence of sulfosulfuron under laboratory conditions. Pestic Res J 21: 140–142 Google Scholar
Barkworth, ME, Capels, KM, Long, S (1993) Ventenata . Pages 683–684 in Flora of North America Editorial Committee, eds. Flora of North America North of Mexico. Volume 24: Magnoliophyta: Commelinidae (in part): Poaceae, part 1. New York and Oxford: Oxford University Press. 944 pGoogle Scholar
Black, AE, Strand, E, Wright, RG, Scott, JM, Morgan, P, Watson, C (1998) Land use history at multiple scales: implications for conservation planning. Landsc Urban Plann 43: 49–63 Google Scholar
DiTomaso, JM (1995) Approaches for improving crop competitiveness through manipulation of fertilization strategies. Weed Sci 43: 491–497 Google Scholar
Fountain, B (2011) Producing timothy hay and managing for the impacts for Ventana . Pages 107–108 in Proceedings of the Western Society of Weed Science. Volume 64. Las Cruces, NM: Western Society of Weed Science Google Scholar
Ingwell, L, Bosque-Perez, NA (2014) Invasive weed Ventenata dubia is a host of Barley yellow dwarf virus with implications for an endangered grassland habitat. Weed Res 55: 62–70 Google Scholar
James, JJ (2008) Leaf nitrogen productivity as a mechanism driving the success of invasive annual grasses under low and high nitrogen supply. J Arid Environ 72: 1775–1784 Google Scholar
Kyser, KB, DiTomaso, JM, Doran, MP, Orloff, SB, Wilson, RG, Lancaster, DL, Lile, DF, Porath, ML (2007) Control of medusahead (Taeniatherum caput-medusae) and other annual grasses with imazapic. Weed Technol 21: 66–75 Google Scholar
Mackey, A (2014) Developing a Decision Support Tool for Ventenata (Ventenata dubia) Integrated Pest Management in the Inland Northwest. MS thesis. Moscow, ID: University of Idaho. 33 pGoogle Scholar
Mahler, RL (2005) Northern Idaho Fertilizer Guide: Grass Pastures. Moscow, ID: University of Idaho College of Agricultural and Life Sciences Extension Bull. CIS 853 Google Scholar
Mangold, J, Parkinson, H, Duncan, C, Rice, P, Davis, E, Menalled, F (2013) Downy brome (Bromus tectorum) control with imazapic on Montana grasslands. Invasive Plant Sci Manag 6: 554–558 Google Scholar
Monaco, TA, Creech, JE (2004) Sulfosulfuron effects on growth and photosynthesis of 15 range grasses. J Range Manag 57: 490–496 Google Scholar
Monaco, TA, Osmond, TM, Dewey, SA (2005) Medusahead control with fall- and spring-applied herbicides on northern Utah foothills. Weed Technol 19: 623–627 Google Scholar
Nyamai, PA, Prather, TS, Wallace, JM (2011) Evaluating restoration methods across a range of plant communities dominated by invasive annual grasses to native perennial grasses. Invasive Plant Sci Manag 4: 306–316 Google Scholar
R Core Team (2013) R: A Language and Environment for Statistical Computing. Vienna, Austria: R Foundation for Statistical Computing. http://www.R-project.org/. Accessed January 1, 2016Google Scholar
Rinella, MJ, Bellows, SE, Roth, AD (2014) Aminopyralid constrains seed production of the invasive annual grasses medusahead and ventenata. Rangeland Ecol Manag 67: 406–411 Google Scholar
Sbatella, GM, Wilson, RG, Enloe, SF, Hicks, C (2011) Propoxycarbazone-sodium and imazapic effects on downy brome (Bromus tectorum) and newly seeded perennial grasses. Invasive Plant Sci Manag 4: 78–86 Google Scholar
Scheinhost, P, Stannard, M, Prather, TS (2009) Ventenata: Ventenata dubia (Leers) Coss. USDA Natural Resource Conservation Service Plant Guide. Pullman, WA: Pullman Plant Materials Center. 3 pGoogle Scholar
Sheley, RL, Carpinelli, MF, Reever-Morghan, KJ (2007) Effects of imazapic on target and nontarget vegetation during revegetation. Weed Technol 21: 1071–1081 Google Scholar
Wallace, JM, Pavek, PL, Prather, TS (2015) Ecological characteristics of Ventenata dubia in the Intermountain Pacific Northwest. Invasive Plant Sci Manag 8: 57–71 Google Scholar