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Agronomy Journal Abstract -

Factors in Paraquat-Induced Chlorosis with Phaseolus Foliar Tissues1


This article in AJ

  1. Vol. 59 No. 4, p. 364-366
    Received: Mar 13, 1967

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  1. Don L. Barnes and
  2. J. Q. Lynd2



Bioassay procedures with leaf disks from Phaseolus vulgaris L., Indian bean, were used to determine factors influencing ( 1,1′-dimethyl-4,4'bipyridinium) paraquat activity. Relative phytotoxicity was determined by varying herbicide levels from 0 to 1.0 ppm ai with light intensity, temperature and reaction time. Reduction of extractable chlorophyll was closely related to increased paraquat concentrations. Increased time, temperature and light intensity accelerated rate and magnitude of leaf disk chlorosis induced with active paraquat levels.

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