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Longspine Sandbur (Cenchrus longispinus) Ecology and Interference in Irrigated Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Randy L. Anderson
Randy L. Anderson*
Affiliation:
Central Great Plains Research Unit, Akron, CO 80720
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Abstract

Longspine sandbur is a troublesome weed infesting corn in the Great Plains. However, herbicides are now available to control this species. This study characterized longspine sandbur ecology in irrigated corn to aid producers in integrating herbicides into their production systems. Longspine sandbur began emerging May 25, and by June 15, 84% of the seasonal emergence had occurred. Plant development was related to cumulative growing degree days. Seeds were viable early in longspine sandbur's development, with 20% of seeds viable by heading. Producers can minimize seed production of longspine sandbur in field borders by mowing plants at the boot stage. Bur production per plant was related to time of emergence, with seedlings emerging in late May producing 1,120 burs per plant. Seedlings emerging 4 wk later produced 84% fewer burs. Controlling longspine sandbur before 4 wk of interference prevented loss of corn grain yield.

Keywords

Longspine sandbur, Cenchrus longispinus (Hack.) Fern. # CCHPAcorn, Zea mays L. ‘Pioneer Brand 3732.'Bur productiongrowing degree day accumulationherbicidesplant developmentCCHPAGDD, growing degree dayN, nitrogen; POST, postemergence
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 667 - 671
Copyright
Copyright © 1997 by the Weed Science Society of America 

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