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

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

Abstract

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.

Apocynum androsaemifolium es una maleza problemática en campos de arándano silvestre. En 2008 y 2009, se realizaron estudios de campo para evaluar la eficacia de diferentes herbicidas y técnicas de aplicación sobre A. androsaemifolium y la tolerancia del arándano. Los resultados indicaron que la aplicación general durante el verano de nicosulfuron a 25 g ai ha−1 con una mezcla de surfactante con hidrocarburos de petróleo 0.5% v/v, suprimió (>60%) A. androsaemifolium en tres de los cuatro sitios experimentales. Aplicaciones localizadas de glyphosate a 5 g ae L−1 agua brindaron un control más efectivo y duradero que la deshierba manual. La aplicación con azadón químico de glyphosate a 154 g ae L−1 agua o de triclopyr a 29 g ae L−1 agua sobre tejido aéreo fueron también métodos efectivos de control cuando A. androsaemifolium tuvo una distribución localizada. Aunque un daño al cultivo de bajo a moderado puede acompañar a estas técnicas de aplicación, esto puede ser tolerable para productores que apliquen estas opciones con el objetivo de limitar pérdidas en rendimiento a largo plazo causadas por A. androsaemifolium.

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Corresponding author

Corresponding author's E-mail: nboyd@nsac.ca

References

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

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

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