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Preplant Weed Control in a Ridge-Till Soybean (Glycine max) and Grain Sorghum (Sorghum bicolor) Rotation

Published online by Cambridge University Press:  12 June 2017

David L. Regehr  and
Keith A. Janssen
David L. Regehr
Affiliation:
Dep. Agron., Kans. State Univ., Manhattan, KS 66506-5501
Keith A. Janssen
Affiliation:
Dep. Agron., Kans. State Univ., Manhattan, KS 66506-5501
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Abstract

Research in Kansas from 1983 to 1986 evaluated early preplant (30 to 45 days) and late preplant (10 to 14 days) herbicide treatments for weed control before ridge-till planting in a soybean and sorghum rotation. Control of fall panicum and common lambsquarters at planting time averaged at least 95% for all early preplant and 92% for late preplant treatments. Where no preplant treatment was used, heavy weed growth in spring delayed soil dry-down, which resulted in poor ridge-till planting conditions and reduced plant stands, and ultimately reduced sorghum grain yields by 24% and soybean yields by 12%. Horsenettle population declined significantly, and honeyvine milkweed population increased. Smooth groundcherry populations fluctuated from year to year with no overall change.

Keywords

Common lambsquarters, Chenopodium album L. ♯3 CHEALfall panicum, Panicum dichotomiflorum Michx. ♯ PANDIhoneyvine milkweed, Ampelamus albidus (Nutt)Britt. ♯ AMPALhorsenettle, Solanum carolinense L. ♯ SOLCAsmooth groundcherry, Solarium subglabrata Mackenz. & Bush ♯ PHYSUsorghum, Sorghum bicolor (L.)Moenchsoybean, Glycine max (L.)Merr.Conservation tillagecrop rotationssustainable agricultureatrazinecyanazineglyphosatemetolachlormetribuzinpendimethalin2,4-DAMPALCHEALPANDIPHYSUSOLCA
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 621 - 626
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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