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Ecology and Interference of Proso Millet (Panicum miliaceum) in Semi-Arid Corn

Published online by Cambridge University Press:  20 January 2017

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

Producers in the semi-arid Great Plains are starting to grow corn in sequence with winter wheat and proso millet. However, volunteer proso millet (hereafter referred to as proso) is difficult to control in corn with conventional practices. This study characterized growth and interference of proso in corn to aid producers in developing control strategies. Proso seedlings began emerging May 18 with 78% of seasonal emergence occurring by June 22; initial proso emergence occurred within 2 wk of corn emergence in all years. Seed production was related to time of emergence; proso seedlings emerging in mid-May produced approximately 2,800 seeds per plant, whereas seedlings emerging 4 wk later produced 88% fewer seeds. Controlling proso in late June prevented loss of corn grain yield caused by competition. When corn was planted in early May, the height difference between corn and proso was sufficient to allow postemergence-directed applications of graminicides for proso control. Corn yield was highest when planted in early May.

Keywords

Proso millet, Panicum milaceum L. # PAMILcorn, Zea mays L. ‘Pioneer hybrid 3732’wheat, Triticum aestivum LCritical period of interferenceemergence periodtransgenic cornPAMILGDD, growing degree days
Type
Research
Information
Weed Technology , Volume 14 , Issue 1 , March 2000 , pp. 45 - 50
Copyright
Copyright © Weed Science Society of America 

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