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Response of Four Cranberry Varieties to Delayed Applications of Dichlobenil

Published online by Cambridge University Press:  20 January 2017

Hilary A. Sandler
Hilary A. Sandler*
Affiliation:
UMass Cranberry Station, P.O. Box 569, East Wareham, MA 02538
*
Corresponding author's E-mail: [email protected]
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Abstract

Field studies were conducted in 2009 and 2010 on established commercial cranberry farms in southeastern Massachusetts to evaluate cranberry vine injury and yield with two rates of dichlobenil (1.8 and 2.7 kg ai ha−1) applied at various growth stages starting in mid-May. Four varieties were evaluated: ‘Ben Lear', ‘Early Black', ‘Howes', and ‘Stevens'. Ben Lear vines exhibited leaf-stress symptoms in both years, and Howes and Stevens vines had leaf symptoms in 1 yr. Data indicated that applications made during periods of flower-part development and growth (jewel through bloom) had the highest injury ratings. Growth stage affected injury ratings by variety and dichlobenil rate in 1 out of 2 yr. In all cases, leaf symptoms abated by the end of the season. No effect on yield (wt of fruit per unit area) was detected for any treatment combination on any variety in either year. Data from the present study support pursuit of future studies and can guide management decisions for dodder control to a limited extent. Longer studies are needed to fully evaluate repeated, annual applications of dichlobenil dispensed during periods of rapid growth on cranberry vine development and yield. Further work is also needed to document the practical use of delayed applications of dichlobenil for dodder management.

Se realizaron experimentos de campo en 2009 y 2010 en plantaciones comerciales establecidas de arándano (Vaccinium macrocarpon) en el sureste de Massachusetts para evaluar el daño y el rendimiento en plantas de arándano con dos dosis de dichlobenil (1.8 y 2.7 kg ai ha−1) aplicadas en varios estados de desarrollo iniciando en la mitad de Mayo. Se evaluaron cuatro variedades: 'Ben Lear', 'Early Black', 'Howes' y 'Stevens'. Las plantas de Ben Lear mostraron síntomas de estrés en las hojas en ambos años, y Howes y Stevens tuvieron síntomas foliares solo en un año. Los datos indicaron que las aplicaciones hechas durante períodos de desarrollo y crecimiento de partes florales (joya a apertura de la flor) tuvieron los niveles más altos de daño. El estado de crecimiento afectó las evaluaciones de daño por variedad y dosis de dichlobenil en uno de los dos años. En todos los casos, los síntomas foliares desaparecieron al final de la temporada. No se detectó ningún efecto en el rendimiento (peso o frutas por unidad de área) debido a las combinaciones de tratamientos en ninguna de las variedades en ninguno de los años. Los datos del presente estudio apoyan la realización de futuros estudios y en cierto grado pueden guiar la toma de decisiones para el control de Cuscuta spp. Se necesitan estudios más largos para evaluar ampliamente el efecto de la aplicación anual repetida de dichlobenil durante períodos de rápido crecimiento sobre el desarrollo y rendimiento de la planta de arándano. También se necesita trabajo adicional para documentar el uso práctico de aplicaciones retrasadas de dichlobenil para el manejo de Cuscuta spp.

Keywords

Dodder, Cuscuta sppcranberry, Vaccinium macrocarpon AitDodder managementgrowth stagesphytotoxicitypreemergence
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 27 , Issue 1 , March 2013 , pp. 108 - 112
Copyright
Copyright © Weed Science Society of America 

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