Physical methods for weed control in potatoes

J.A. Ivany

Objectives:
To determine the potential of using different mechanical weed control (within row rototiller; flame weeder; and finger weeder) techniques and banded herbicide application to achieve weed control in potatoes.


Status Report:
A three-year trial demonstrated that mechanical weed control in combination with herbicide application could reduce overall herbicide usage in potatoes. Flame weeding achieved greatest control of quackgrass and broadleaved weeds and generally had highest marketable and total potato yield. Flame weeding at potato emergence or at 10 to 15cm plant height showed no difference in level of weed control. However, flaming before potato emergence and 2 weeks later will reduce potato yield.


Impact:
Consumer concerns over herbicide use in potato production has increased interest in alternative strategies for weed control. Mechanical weed control measures such as within row tillage, flame weeding, and finger weeding may complement herbicide applications thereby reducing overall herbicide usage.


Research Establishment:
Crops and Livestock Research CentreAgriculture and Agri-Food Canada, 440 University Ave, Charlottetown, PEI, C1A 4N6


Funding Sources:
Agriculture and Agri-Food Canada

Corresponding Author: IvanyJ@agr.gc.ca


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