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Cultural Strategies Reduce Weed Densities in Summer Annual Crops

Published online by Cambridge University Press:  12 June 2017

Randy L. Anderson
Randy L. Anderson*
Affiliation:
Central Great Plains Research Station, Akron, CO 80720. E-mail: [email protected]
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Abstract

Producers in the central Great Plains are seeking alternative strategies to manage weeds because of herbicide resistance, narrow profit margins, and a lack of registered herbicides in some crops. Thus, we evaluated the impact of cultural systems in winter wheat and tillage on weed dynamics in corn, sunflower, and proso millet planted the year following wheat harvest. Weed seedling densities were 25 to 30% lower in a no-till system compared with minimum-till with a sweep plow. With no-till, cultural systems that produced more crop residue reduced weed densities an additional 15 to 30%, compared with the conventional system. Cultural system effect was eliminated in dry years and by tillage. Weed biomass was 10-fold less in proso millet than in corn. Crop residue management, critical for successful cropping in semiarid regions, also will help weed management by reducing weed density in summer annual crops, especially in no-till systems.

Keywords

Corn, Zea mays L.proso millet, Panicum miliaceum L.sunflower, Helianthus animus L.winter wheat, Triticum aestivum L., ‘TAM 107,’ ‘Lamar.’Crop residuepreventive strategiessystems approachtillage
Type
Research
Information
Weed Technology , Volume 13 , Issue 2 , June 1999 , pp. 314 - 319
Copyright
Copyright © 1999 by the Weed Science Society of America 

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