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Patterns of Weed Emergence in Tropical Soil

Published online by Cambridge University Press:  12 June 2017

Robert L. Zimdahl ,
Keith Moody ,
Rosario T. Lubigan  and
Eduardo M. Castin
Robert L. Zimdahl
Affiliation:
Weed Res. Lab., Dep. Plant Pathol. and Weed Sci., Colorado State Univ., Ft. Collins, CO 80523
Keith Moody
Affiliation:
Dep. Agron., Int. Rice Res. Inst., Los Banos, Laguna, Philippines
Rosario T. Lubigan
Affiliation:
Dep. Agron., Int. Rice Res. Inst., Los Banos, Laguna, Philippines
Eduardo M. Castin
Affiliation:
Dep. Agron., Int. Rice Res. Inst., Los Banos, Laguna, Philippines
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Abstract

Patterns of weed emergence in upland and lowland soils were observed for several months after tillage by counting all emerged species. Forty to 50% of weed emergence occurred within 6 weeks of tillage on both sites. Significant emergence occurred within 3 weeks on both sites, but very little emergence occurred within 1 week in lowland soil. The data confirm the strong influence of soil tillage on weed emergence. They also suggest an influence of radiant energy on weed emergence. Peaks of weed emergence 6 or more weeks after tillage often occurred coincident with or soon after peaks of radiant energy.

Keywords

Lowland soilupland soilCyperus difformisFimbristylis miliaceaOryza sativaPortulaca oleraceaRottboellia cochinchinensisCYPDIFIMMIPOROLROOEX
Type
Weed Biology and Ecology
Information
Weed Science , Volume 36 , Issue 5 , September 1988 , pp. 603 - 608
Copyright
Copyright © 1988 by the Weed Science Society of America 

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