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American Germander (Teucrium canadense) Control in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

D. L. Wyse  and
O. E. Strand
D. L. Wyse
Affiliation:
Dep. Agron. and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55101
O. E. Strand
Affiliation:
Dep. Agron. and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55101
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Abstract

Experiments were conducted to develop systems for control of American germander [Teucrium canadense L. var. virginicum (L.) Eat.] in corn (Zea mays L. ‘Trojan TXS 105A’). Soil-incorporated, preemergence, and postemergence herbicide treatments were evaluated in greenhouse studies. Soil incorporated applications of EPTC (S-ethyl dipropylthiocarbamate) + R-25788 (N,N-diallyl-2,2-dichloroacetamide), atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] and alachlor [2-chloro-2′,6′-diethyl-N-(methoxymethyl)acetanilide] effectively reduced its growth. Preemergence applications of alachlor and atrazine did not control American germander. Postemergence applications of the dimethylamine salt of 2,4-D [(2,4-dichlorophenoxy)acetic acid] the butoxyethanol ester of 2,4-D and dicamba (3,6-dichoro-o-anisic acid) gave 20 to 41% control. Atrazine + crop oil gave 76 to 84% control. Soil-incorporated treatments of atrazine or EPTC + R-25788 controlled American germander better than alchlor when the rhizomes were planted at depths of 2.5 and 10 cm in greenhouse studies. In field trials American germander was a severe competitor in corn, especially when soil moisture was limited, and had the capability of substantially reducing corn yields when not controlled. EPTC + R-25788 and atrazine applied alone or in combinations as preplant incorporated treatments increased yield significantly and controlled 85 to 99% of the American germander 72 weeks after planting. Atrazine + oil was the only effective postemergence treatment.

Keywords

HerbicidesatrazineEPTC + R-25788alachlor2,4-D
Type
Research Article
Information
Weed Science , Volume 27 , Issue 6 , November 1979 , pp. 615 - 618
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

Literature Cited

1. Buchholtz, K. P. 1963. Use of atrazine and other triazine herbicides in control of quackgrass in corn fields. Weeds 11:202–205.Google Scholar
2. Costa, C. and Appleby, A. P. 1976. Response of two yellow nutsedge varieties to three herbicides. Weed Sci. 24:54–58.Google Scholar
3. Fernald, M. L. 1950. Gray's Manual of Botany, 8th ed., American Book Co., New York. 1632 pp.Google Scholar
4. Holt, E. C., Long, J. A., and Allen, W. W. 1962. The toxicity of EPTC to nustedge. Weeds 10:103–105.Google Scholar
5. Keeley, P. E. and Thullen, R. J. 1974. Yellow nutsedge control with soil incorporated herbicides. Weed Sci. 22:378–383.Google Scholar
6. Parochetti, J. V. 1974. Canada thistle control with atrazine. Weed Sci. 22:28–31.Google Scholar
7. Parochetti, J. V. 1974. Yellow nutsedge, giant foxtail, and fall panicum control in corn. Weed Sci. 22:80–82.Google Scholar
8. Roeth, F. W. 1973. Johnsongrass control in corn with soil incorporated herbicides. Weed Sci. 21:474–476.Google Scholar
9. Wyse, D. L. 1976. Quackgrass control in field crops. Proc. North Cent. Weed Control Conf. 31:152–154.Google Scholar