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Overcoming Antagonistic Effects of Na-Bentazon on Sethoxydim Absorption

Published online by Cambridge University Press:  12 June 2017

Gunawan Wanamarta ,
James J. Kells  and
Donald Penner
Gunawan Wanamarta
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing 48824
James J. Kells
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing 48824
Donald Penner
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing 48824
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Abstract

The influence of adjuvants, inorganic salts, and herbicide formulations on the antagonistic effect of Na-bentazon on sethoxydim absorption was studied in quackgrass. Adjuvant BCH 815 00, at 2.4 L ha−1 alone or at 1.2 L ha−1 combined with 1.1 kg ha−1 of ammonium sulfate, added to the sethoxydim and Na-bentazon spray mixture overcame the antagonism on 14C-sethoxydim absorption in quackgrass. Crop oil concentrate at rates up to 9.6 L ha−1 did not overcome the antagonism. Adding ammonium phosphate or ammonium nitrate to the spray solution was as effective as adding ammonium sulfate in overcoming the antagonism caused by reduced absorption of sethoxydim even from the combination of Na-bentazon plus Na-acifluorfen. Ammonium salts and NH4-bentazon overcame the antagonism of Na-bentazon by forming readily absorbed NH4-sethoxydim.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidbentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidesethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onequackgrass, Elytrigia repens (L.) Nevski # AGRREAmmonium sulfateammonium saltsacifluorfenAGRREquackgrassElytrigia repens
Type
Research
Information
Weed Technology , Volume 7 , Issue 2 , June 1993 , pp. 322 - 325
Copyright
Copyright © 1993 Weed Science Society of America 

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References

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