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Indicator Plant Aberrations at Threshold Soil Herbicide Levels
Author(s) -
Lynd J. Q.,
Rieck Charles,
Barnes Don,
Murray Don,
Santelmann Paul W.
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/agronj1967.00021962005900020022x
Subject(s) - alternanthera philoxeroides , chlorosis , biology , chemistry , agronomy , botany , horticulture , weed
Plant symptoms indicating threshold soil herbicide levels on a Typic Quarzipsamment, Eufaula fine sand, are described and illustrated for five long‐residue phytotoxic compounds from three chemical families: the substituted ureas, the triazines, and the pyridines. Cucumis sativa developed marginal chlorosis with 1 ppmw fluometuron (3 (m‐trifluoromethylpheny1)‐1,l‐dimethylurea); palmate veinal chlorotic pattern with 1 ppmw prometryne (2‐methylmercapto‐4,6‐bis (isopropylamino)‐1,3,5‐triazine); auxin‐type manifestations of meristematic tissues with 0.01 ppmw picloram (4‐amino‐3,5,6‐uichloro‐picolinic acid); and an interveinal chlorotic pattern with 1 ppmw pyriclor (2,3,5‐trichloro‐4‐pyridinol). Robinia pseudoacacia developed severe leaf curling and stem twisting with tendril type appearance and restricted club‐like root system at 1 ppmw N‐serve (2‐chloro‐6‐(trichloromethyl) pyridine).