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Management of Spreading Pricklypear (Opuntia humifusa) with Fluroxypyr and Aminopyralid

Published online by Cambridge University Press:  20 January 2017

Jason Ferrell ,
Brent Sellers  and
Ramon Leon
Jason Ferrell*
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL 32611
Brent Sellers
Affiliation:
Range Cattle REC, University of Florida, Ona, FL 33865
Ramon Leon
Affiliation:
West Florida REC, Jay, FL32565
*
Corresponding author's Email: [email protected].
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Abstract

Experiments were conducted throughout central Florida from 2010 to 2014 to determine the effectiveness of fluroxypyr or aminopyralid for control of spreading pricklypear. Aminopyralid + 2,4-D (0.09 + 0.75 kg ae ha−1) was not effective and provided only 15% control by 18 mo after application (MAT). However, fluroxypyr at 0.55 kg ae ha−1 or sequential applications of 0.27 kg ha−1 provided greater than 82% control at 18 MAT. Reducing fluroxypyr rates to 0.32 kg ha−1 reduced control to 40 and 71% for spring versus fall applications, respectively. However, the addition of aminopyralid + 2,4-D to fluroxypyr at 0.32 kg ha−1 improved pricklypear control to 92%, regardless of application timing.

Se realizaron experimentos a lo largo de Florida Central desde 2010 a 2014 para determinar la efectividad de fluroxypyr o aminopyralid para el control de Opuntia humifusa. Aminopyralid + 2,4-D (0.09 + 0.75 kg ae ha−1) no fue efectivo y brindó solamente 15% de control a 18 meses después del tratamiento (MAT). Sin embargo, fluroxypyr a 0.55 kg ae ha−1 o en aplicaciones secuenciales de 0.27 kg ha−1 brindó un control superior a 82% a 18 MAT. El reducir las dosis de fluroxypyr a 0.32 kg ha−1 disminuyó el control a 40 y 71% para aplicaciones en la primavera y el otoño, respectivamente. Sin embargo, el agregar aminopyralid + 2,4-D a fluroxypyr a 0.32 kg ha−1 mejoró el control de O. humifusa a 92% sin importar el momento de aplicación.

Keywords

Aminopyralid2,4-Dfluroxypyrspreading pricklypear, Opuntia humifusa Raf. OPUHUCactuspastureperennial weed
Type
Research Article
Information
Weed Technology , Volume 28 , Issue 4 , December 2014 , pp. 734 - 738
Copyright
Copyright © Weed Science Society of America 

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