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Tolerance of Tomato (Lycopersicon esculentum) Cultivars to Metribuzin

Published online by Cambridge University Press:  12 June 2017

Stanislaw W. Gawronski
Stanislaw W. Gawronski*
Affiliation:
Faculty of Horticulture, Warsaw Agricultural University, 02-766, Warsaw, Poland
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Abstract

Twenty-six cultivars of tomatoes from several countries were divided into four metribuzin [4-amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one] tolerance groups: tolerant, semi-tolerant, semi-susceptible, and susceptible. Early maturity and tolerance to metribuzin were correlated (r = −0.78) in the field experiment and (r = −0.72) in a sinking leaf-disc bioassay. New super early cultivars were especially sensitive to metribuzin. Chlorophyll a and b content were not highly correlated with tolerance to metribuzin. Metribuzin rates used for weed control are close to toxic concentrations for very early cultivars of tomatoes. Plants in the 9-leaf stage were less sensitive than plants in the 5- or 7-leaf stage. Metribuzin tolerance came at later stages in early maturing cultivars than in later maturing cultivars.

Keywords

Herbicidesusceptibilitygenotypestriazinone
Type
Research Article
Information
Weed Science , Volume 31 , Issue 4 , July 1983 , pp. 525 - 527
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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