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Factors in Paraquat‐Induced Chlorosis with Phaseolus Foliar Tissues 1
Author(s) -
Barnes Don L.,
Lynd J. Q.
Publication year - 1967
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1967.00021962005900040022x
Subject(s) - phaseolus , paraquat , chlorosis , phytotoxicity , bioassay , chlorophyll , agronomy , horticulture , biology , light intensity , chemistry , botany , biochemistry , physics , optics , genetics
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.