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Asulam mixtures for weed control in flax
Author(s) -
CHOW P. N. P.
Publication year - 1977
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1977.tb00445.x
Subject(s) - bromoxynil , mcpa , avena fatua , weed , weed control , setaria viridis , agronomy , linum , phytotoxicity , chemistry , foxtail , horticulture , biology
Summary: Five field experiments were conducted from 1972 to 1975 to evaluate weed control in flax ( Linum usitatissimum L.) using post‐emergence treatments of asulam [methyl (4‐aminobenzenesulphonyl) carbamatel alone and in combination with other herbicides. The 14 C‐asulam absorption by leaf segments and roots of glasshouse grown wild oats (Avena fatua L.) was also investigated. Asulam at 1.12 kg/ha gave good wild oat control and acceptable control of green foxtail (Setaria viridis (L.) Beauv.). However, wild oat control was poorer when asulam was combined with other herbicides: on a 3‐year average, as compared with asulam alone at equal rates, the asulam+MCPA mixture resulted in a greater antagonism and a significant 6% reduction in flax seed yield, whereas the asulam+bromoxynil/MCPA mixture gave the least antagonistic effect, improved broadleaf weed control and increased yield by 13%. In mixtures, the potassium salt of MCPA was more compatible with asulam for weed control than the amine form. Both leaf segments and roots of wild oats absorbed and distributed less 14 C‐asulam from solutions containing MCPA than from those containing bromoxynil or bromoxynil/MCPA.