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Cover Crops for Herbicide Replacement in No-tillage Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Joseph P. Yenish ,
A. Douglas Worsham  and
Alan C. York
Joseph P. Yenish
Affiliation:
Dep. Crop Sci., N.C. State Univ., Raleigh, NC 27695
A. Douglas Worsham
Affiliation:
Dep. Crop Sci., N.C. State Univ., Raleigh, NC 27695
Alan C. York
Affiliation:
Dep. Crop Sci., N.C. State Univ., Raleigh, NC 27695
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Abstract

Weed control by rye, crimson clover, subterranean clover, and hairy vetch cover crops was evaluated in no-tillage corn during 1992 and 1993 at two North Carolina locations. Weed biomass reduction was similar with rye, crimson clover, and subterranean clover treatments, ranging between 19 and 95% less biomass than a conventional tillage treatment without cover. Weed biomass reduction using hairy vetch or no cover in a notillage system was similar averaging between 0 and 49%, but less than other covers approximately 45 and 90 d after planting. Weed biomass was eliminated or nearly eliminated in all cover systems with PRE plus POST herbicide treatments. Weed species present varied greatly between years and locations, but were predominantly common lambsquarters, smooth pigweed, redroot pigweed, and broadleaf signalgrass. Corn grain yield was greatest using PRE herbicides or PRE plus POST herbicides, averaging between 16 to 100% greater than the nontreated control across all cover treatments depending on the year and location.

Keywords

Broadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash. # BRAPPcommon lambsquarters, Chenopodium album L. # CHEALredroot pigweed, Amaranthus retroflexus L. # AMAREsmooth pigweed, Amaranthus hybridus L. # AMACHcorn, Zea mays L. ‘Dekalb 689’crimson clover, Trifolium incarnation L. ‘Dixie Reseeding’hairy vetch, Vicia villosa Rothrye, Secale cereale L. ‘Wren's Abruzzi’subterranean clover, Trifolium subterraneum L. ‘Mount Barker.’Allelopathyconservation tillage
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 815 - 821
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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