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The Interaction of Acifluorfen and Bentazon in Herbicidal Combinations

Published online by Cambridge University Press:  12 June 2017

Veldon M. Sorensen ,
W. F. Meggitt  and
Donald Penner
Veldon M. Sorensen
Affiliation:
Pestic. Res. Ctr., Dep. Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
W. F. Meggitt
Affiliation:
Pestic. Res. Ctr., Dep. Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
Donald Penner
Affiliation:
Pestic. Res. Ctr., Dep. Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
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Abstract

Acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} and bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] were applied singly, in combination at various rates, with and without a crop oil concentrate to common lambsquarters (Chenopodium album L. # CHEAL), redroot pigweed (Amaranthus retroflexus L. # AMARE), jimsonweed (Datura stramonium L. # DATST), and velvetleaf (Abutilon theophrasti Medic. # ABUTH) grown in containers in the greenhouse and outdoors. Without crop oil concentrate, synergistic responses to the combinations were measured in common lambsquarters and velvetleaf. Antagonistic responses were measured in jimsonweed. Redroot pigweed response was antagonistic in the greenhouse and synergistic outdoors. The addition of a crop oil concentrate tended to mask the interactions. Crop oil concentrate also increased the droplet size for common lambsquarters, velvetleaf, jimsonweed, and redroot pigweed 53, 41, 28, and 27%, respectively. Neither herbicide at any rate or combination influenced droplet size. Radiolabeled studies showed reduced uptake of 14C-acifluorfen when bentazon was present in common lambsquarters and redroot pigweed by 15 and 10%, respectively. Radiolabeled bentazon uptake was reduced 3% in jimsonweed and increased 20% in redroot pigweed when acifluorfen was present.

Keywords

Crop oil concentratesynergismantagonismChenopodium albumAmaranthus retroflexusDatura stramoniumAbutilon theophrastiAMAREABUTHCHEALDATST
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 35 , Issue 4 , July 1987 , pp. 449 - 456
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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