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Population Dynamics of Crenate Broomrape (Orobanche crenata) in Faba Bean (Vicia faba)

Published online by Cambridge University Press:  12 June 2017

Francisca Lopez-Granados  and
Luis Garcia-Torres
Francisca Lopez-Granados
Affiliation:
CSIC Inst. of Sustainable Agric., Aptdo. 240-14080, Cordoba, Spain
Luis Garcia-Torres
Affiliation:
CSIC Inst. of Sustainable Agric., Aptdo. 240-14080, Cordoba, Spain
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Abstract

Progression of crenate broomrape population density (PD, number of emerged plants m-2) in faba bean was studied over 8 yr in Spain. Spatial dispersion and effect of climatic conditions on parasite population growth rate (PGR) also were studied. With repeated cropping of faba bean, infestations of crenate broomrape increased from an initial PD of 0.15 to an average of 26, with a maximum of about 40 to 45. The average population growth rate (PGR, ratio between the PD of any 2 consecutive years) was approximately 3. However, this figure varied widely among localities and years, from 0.8 to 7.7. A highly significant relationship (P = 0.01) was found between PGR and rainfall and soil temperatures during December to February, months of crop vegetative growth. Dispersion of crenate broomrape infestations mainly followed direction of crop rows, most likely due to the effect of tillage and harvesting operations, which were the same direction as sowing.

Keywords

Orobanche crenata Forsk. # ORACRVicia faba L. ‘Alameda’Parasitic weedsevolutionseed dispersionORACR
Type
Weed Biology and Ecology
Information
Weed Science , Volume 41 , Issue 4 , December 1993 , pp. 563 - 567
Copyright
Copyright © 1994 by the Weed Science Society of America 

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