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Tomato (Lycopersicon esculentum) Cultivar and Weed Sensitivity to DPX-E9636

Published online by Cambridge University Press:  12 June 2017

Thomas A. Bewick ,
Kenneth Smith ,
William M. Stall  and
Steven M. Olson
Thomas A. Bewick
Affiliation:
Hortic. Sci. Dep., Univ. of Florida, Gainesville
Kenneth Smith
Affiliation:
Hortic. Sci. Dep., Univ. of Florida, Gainesville
William M. Stall
Affiliation:
Hortic. Sci. Dep., Univ. of Florida, Gainesville
Steven M. Olson
Affiliation:
North Florida Res. and Educ. Center, Quincy
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Abstract

Sensitivity of 49 tomato cultivars and four weeds to DPX-E9636 was determined in greenhouse experiments. Cultivar tolerance varied from completely tolerant to intolerant. The most efficacious application method in greenhouse experiments was early POST for the weeds tested (yellow nutsedge, prostrate eclipta, and paraquat-resistant and -sensitive American black nightshade). Paraquat-resistant American black nightshade was 123 times more sensitive to DPX-E9636 than the paraquat-sensitive biotype. Under field conditions and at 0, 36, or 72 g ai/ha applied one week after transplanting, tomato cultivars showed no response to DPX-E9636 in visual vigor ratings 3 wk treatment, or in shoot fresh or dry weight 4 wk after treatment.

Keywords

DPX-E9636 N-(4,6-dimetyl-pyrimidin-2-yl)-aminocarbonyl)-3-(ethylsulfonyl)-2-pyridine sulfonamidetomato, Lycopersicon esculentum Mill., American black nightshade, Solanum americanum Mill. # SOLAMprostrate eclipta, Eclipta prostrata L. # ECLAL, yellow nutsedge, Cyperus esculentus L., # CYPESCrop toleranceherbicide resistanceresistance managementAmaranthus hybridusCyperus esculentusEclipta albaEleusine indicaLamium amplexicauleSolanum americanumAMACHCYPESECLALELEINLAMAMSOLAM
Type
Research
Information
Weed Technology , Volume 9 , Issue 3 , September 1995 , pp. 499 - 503
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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