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Effects of Repeat Annual Applications of Dichlobenil on Weed Populations and Yield Components of Cranberry

Published online by Cambridge University Press:  20 January 2017

Hilary A. Sandler*
Affiliation:
University of Massachusetts–Amherst Cranberry Station, P.O. Box 569, East Wareham, MA 02538
Joanne Mason
Affiliation:
University of Massachusetts–Amherst Cranberry Station, P.O. Box 569, East Wareham, MA 02538
Wesley R. Autio
Affiliation:
Plant and Soil Sciences, University of Massachusetts–Amherst, Amherst, MA 01002
Thomas A. Bewick
Affiliation:
National Program Leader–Horticulture, Cooperative State Research, Education, and Extension Service, United States Department of Agriculture, Washington, DC 20250
*
Corresponding author's E-mail: [email protected]

Abstract

To address grower concerns that repeated use of dichlobenil could negatively affect cranberry productivity, field studies were conducted at two commercial farms in either high weed density (HW) or low weed density (LW) areas. Data from 4 yr of repeat annual applications of 0, 1.8, and 4.5 kg ai/ha dichlobenil indicated minimal negative impact on cranberry vines. Herbicide application did not affect upright productivity, leaf biomass production, percent fruit set, or other yield parameters adversely; in addition, no improvement in these parameters was noted. Although the interaction of herbicide application with weed density on cranberry root length varied with sampling date, no consistent trend (adverse or positive) was seen. The presence of weeds, rather than herbicide application, was the important determinant of yield. Vines in LW areas produced more marketable fruit and had higher percentage of fruit set than vines growing in HW areas. Repeat annual applications of dichlobenil on commercial cranberry beds may be considered as part of a viable integrated weed management program with no adverse effect on crop growth or yield.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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Footnotes

∗ This research is a part of a dissertation submitted by the senior author in fulfilling doctoral degree requirements at the University of Massachusetts–Amherst.

References

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