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Redstem Filaree (Erodium cicutarium) Development and Productivity Under Noncompetitive Conditions

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw
Affiliation:
Research Center, Agriculture and Agri-Food Canada, P.O. Box 3000, Lethbridge, AB, Canada T1J 4B1
K. Neil Harker
Affiliation:
Research Center, Agriculture and Agri-Food Canada, 6000 C & E Trail, Lacombe, AB, Canada T0C IS0

Abstract

Redstem filaree is becoming widespread and abundant on the Canadian prairies. A field study was conducted to determine the growth, development, and seed yield response of redstem filaree when grown under noncropped conditions and planted at various dates throughout the growing season in Alberta. Redstem filaree emerged within 7 to 13 d of planting with an accumulated 57 to 134 growing degree days (GDD). Flowering occurred within 46 to 65 d (327 to 779 GDD) of planting. Plants that emerged in August or later did not flower in that season and survived as winter annuals. Spring-emerging redstem filaree plants matured within 79 to 100 d (729 to 1,193 GDD). Plants that emerged in May and June attained more biomass and produced threefold more seeds than plants that emerged in July or later. Redstem filaree seed production ranged from 2,400 to 9,900 seeds/plant depending on emergence date and environmental conditions. Information from this study will assist in developing integrated management strategies for this increasingly important weed.

Type
Research
Copyright
Copyright © 1998 by the Weed Science Society of America 

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