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Hemp Dogbane (Apocynum cannabinum) and Wild Blackberry (Rubus allegheniensis) Control in No-tillage Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Scott Glenn  and
Neil G. Anderson
Scott Glenn
Affiliation:
Agron. Dep., Univ. of Md., College Park, MD
Neil G. Anderson
Affiliation:
Agron. Dep., Univ. of Md., College Park, MD
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Abstract

Hemp dogbane and wild blackberry have become significant weed problems in no-tillage corn production in Maryland. Nicosulfuron (31 to 62 g ha−1) plus crop oil concentrate (COC) gave 67% or more hemp dogbane and wild blackberry control. There was no difference in hemp dogbane or wild blackberry control between 31 and 94 g ai ha−1 nicosulfuron. Tank mixtures of 2,4-D or dicamba with nicosulfuron gave 72 to 100% hemp dogbane and wild blackberry control. Hemp dogbane control following applications of 560 g ha−1 2,4-D was 97% in 1989 and 63% in 1990. Wild blackberry control with 2,4-D was 40% both years. Dicamba at 280 g ha−1 gave 70 and 55% control of hemp dogbane and 75 and 65% control of wild blackberry in 1989 and 1990, respectively. Triclopyr plus 2,4-D provided 72 to 98% hemp dogbane control and 92 to 98% wild blackberry control. However, triclopyr plus 2,4-D applied at 280 plus 560 g ha−1 injured corn, and corn yields were reduced compared with weedy controls in 1990.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidnicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamidetriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid2,4-D, (2,4-dichlorophenoxy)acetic acidhemp dogbane, Apocynum cannabinum L. # APCCAwild blackberry, Rubus allegheniensis, Porter # RUBALDicambanicosulfurontriclopyr2,4-DAPCCARUBAL
Type
Research
Information
Weed Technology , Volume 7 , Issue 1 , March 1993 , pp. 47 - 51
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

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