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Postemergence Control of Broadleaf Weeds in Tomato (Lycopersicon esculentum)

Published online by Cambridge University Press:  12 June 2017

Milton E. McGiffen Jr.  and
John B. Masiunas
Milton E. McGiffen Jr.
Affiliation:
Dep. Hortic., Univ. Ill., 1201 W. Gregory Dr., Urbana, IL 61801
John B. Masiunas
Affiliation:
Dep. Hortic., Univ. Ill., 1201 W. Gregory Dr., Urbana, IL 61801
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Abstract

Greenhouse and field experiments were conducted to evaluate the control of eastern black nightshade and velvetleaf in tomato with bentazon, metribuzin, pyridate, and acifluorfen. Metribuzin controlled velvetleaf but not eastern black nightshade, whereas pyridate controlled eastern black nightshade but not velvetleaf. A combination of metribuzin + pyridate controlled both weeds, but caused tomato injury 4 wk after application. Bentazon neither controlled the weeds nor injured the crop. Acifluorfen controlled both eastern black nightshade and velvetleaf. Diammonium phosphate and oxysorbic (5 POE) improved bentazon and acifluorfen activity against velvetleaf. Although initial crop injury from some treatments applied prior to fruit initiation was severe, the crop recovered and there were no reductions in fruit weight compared with the control. However applying acifluorfen with oxysorbic (5 POE) during fruit development reduced yield 50%.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidbentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneoxysorbic (5 POE), polyoxyethene (5) sorbitan monooleatepyridate, O-(6-chloro-3-phenyl-4-pyridazinyl)-S-octyl carbonothioatetomato, Lycopersicon esculentum Millvelvetleaf, Abutilon theophrasti Medik. ♯ ABUTHeastern black nightshade, Solanum ptycanthum Dun. ♯ SOLPTHerbicide selectivityacifluorfenbentazonmetribuzinpyridatediammonium phosphateABUTHSOLPT
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 739 - 745
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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