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Efficacy of Methyl Bromide Alternatives on Purple Nutsedge (Cyperus rotundus) Control in Tomato and Pepper

Published online by Cambridge University Press:  20 January 2017

James P. Gilreath  and
Bielinski M. Santos
James P. Gilreath
Affiliation:
Gulf Coast Research and Education Center, University of Florida, 5007 60th Street East, Bradenton, FL 34203
Bielinski M. Santos*
Affiliation:
Gulf Coast Research and Education Center, University of Florida, 5007 60th Street East, Bradenton, FL 34203
*
Corresponding author's E-mail: bmsantos@yahoo.com
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Abstract

Field trials were conducted to compare the effect of various soil fumigants along with in-bed pebulate and row-middle metribuzin applications on purple nutsedge control and on tomato and bell pepper growth and yield. Treatments consisted of combinations of soil fumigants, pebulate, and metribuzin. Fumigants levels were (1) untreated control, (2) methyl bromide (MBr) + chloropicrin (Pic) (67 + 33%, respectively), (3) Pic, (4) metham, (5) dazomet, and (6) 1,3-dichloropropene (1,3-D) + Pic (83 + 17%, respectively). Pebulate levels were either applied in-bed or not applied. Row middles were either sprayed with metribuzin or untreated. In both crops, purple nutsedge populations were independently influenced by fumigants and pebulate applications, with the highest number of purple nutsedge plants in the untreated control. The addition of pebulate reduced purple nutsedge populations in all treatments. In tomato trials, the yield was affected by fumigants, with the highest losses (53 and 50% reductions in fruit number and weight) observed in the nonfumigated control. In pepper trials, fruit number and weight were individually influenced by fumigants and metribuzin sprayings. Application of metribuzin to row middles increased yields 10% relative to nontreated plots.

Keywords

Purple nutsedge, Cyperus rotundus L. # CYPROpepper, Capsicum annuum L.tomato, Lycopersicon esculentum MillChloropicrindazomet1,3-dichloropropeneinterferencemethammetribuzinpebulatesoil fumigants1,3-D, 1,3-dichlopropeneMBr, methyl bromidePic, chloropicrinWAT, weeks after transplanting
Type
Research
Information
Weed Technology , Volume 18 , Issue 2 , June 2004 , pp. 341 - 345
Copyright
Copyright © Weed Science Society of America 

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Footnotes

∗ Publication R-09634 Florida Agricultural Experiment Station Journal Series.

References

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