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Management of Spreading Dogbane (Apocynum androsaemifolium) in Wild Blueberry Fields

  • Lin Wu (a1) and Nathan S. Boyd (a1)

Spreading dogbane is a troublesome weed of wild blueberry fields. Field studies were conducted in 2008 and 2009 to evaluate efficacy of different herbicides and application techniques on spreading dogbane as well as blueberry tolerance. Results indicated that summer-broadcast nicosulfuron at 25 g ai ha−1 with 0.5% v/v blend of surfactant with petroleum hydrocarbons suppressed (> 60%) spreading dogbane at three of four sites. Spot sprays with dicamba at 1 kg ae ha−1 effectively controlled (> 80%) spreading dogbane with minimal (19 to 23%) blueberry damage at three of four sites. Glyphosate spot sprays at 5 g ae L−1 water provided more effective and longer control than hand pulling. Wiping with glyphosate at 154 g ae L−1 water or wiping triclopyr at 29 g ae L−1 water onto the shoots is also an effective control method for localized patches of spreading dogbane. Although low to moderate crop damage may accompany these techniques, it may still be tolerable for growers to apply these options to limit long-term yield loss caused by spreading dogbane.

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A. DiTommaso , D. R. Clements , S. J. Darbyshire , and J. T. Dauer 2009. The biology of Canadian weeds. 143. Apocynum cannabinum L. Can. J. Plant Sci. 89 :977992.

K.I.N. Jensen and D. E. Yarborough 2004. An overview of weed management in the wild lowbush blueberry—past and present. Small Fruits Rev. 3 :229255.

K. J. Kennedy , N. S. Boyd , and V. O. Nams 2010. Hexazinone and fertilizer impacts on sheep sorrel (rumex acetosella) in wild blueberry. Weed Sci. 58 :317322.

L. Lapointe and L. Rochefort 2001. Weed survey of lowbush blueberry fields in Saguenay-Lac-Saint-Jean, Quebec, following eight years of herbicide application. Can. J. Plant Sci. 81 :471478.

C. L. Schuster , K. Al-Khatib , and J. A. Dille 2007. Mechanism of antagonism of mesotrione on sulfonylurea herbicides. Weed Sci. 55 :429434.

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Weed Technology
  • ISSN: 0890-037X
  • EISSN: 1550-2740
  • URL: /core/journals/weed-technology
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