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Solaria Help Predict In-Crop Weed Densities

Published online by Cambridge University Press:  20 January 2017

Juan J. Eyherabide ,
Pablo A. Calviño ,
Frank Forcella ,
Gabriela Cendoya  and
Kazem Eradat Oskoui
Juan J. Eyherabide*
Affiliation:
Facultad de Ciencias Agrarias, Universidad de Mar del Plata, CC 276, 7620 Balcarce, Argentina
Pablo A. Calviño
Affiliation:
Facultad de Ciencias Agrarias, Universidad de Mar del Plata, CC 276, 7620 Balcarce, Argentina
Frank Forcella
Affiliation:
USDA-ARS North Central Soil Conservation Research Laboratory, Morris, MN 56267
Gabriela Cendoya
Affiliation:
Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, CC 276, 7620 Balcarce, Argentina
Kazem Eradat Oskoui
Affiliation:
West Central Environmental Consultants, Morris, MN 56267
*
Corresponding author's E-mail: eyherabide@telefax.com.ar
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Abstract

At locations in Argentina and the United States, solaria (miniature, portable, plastic greenhouses or a plastic sheet approximately 1 m2) were placed on field soils in autumn or late winter in an attempt to predict summer annual weed densities. Initial emergence of summer annual weeds covered by solaria commenced weeks before that of weeds in exposed seedbeds. Cumulative emergence of many species in solaria reached asymptotes before crops were sown. At asymptotic cumulative emergence, densities of dominant weeds in solaria (common lambsquarters, green foxtail, and large crabgrass) were correlated with weed densities occurring 4 wk after sowing, the typical time for making postemergence weed control decisions. These results indicate that solaria may supplement seedbank-sampling techniques for predicting weed densities in crops.

Keywords

Common lambsquarters, Chenopodium album L. #3 CHEALgreen foxtail, Setaria viridis (L.) Beauv. # SETVIlarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSADecision makingemergencepostemergence controlseedlingssolarizationCWD, in-crop weed densityOM, organic matterPPI, preplant incorporatedPRE, preemergenceSWD, weeds inside solariaTWDthreshold weed density
Type
Commentary
Information
Weed Technology , Volume 17 , Issue 1 , March 2003 , pp. 166 - 172
Copyright
Copyright © Weed Science Society of America 

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