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Compatible and antagonistic mixtures of diclofop‐methyl and flamprop‐methyl with herbicides used to control broad‐leaved weeds
Author(s) -
TAYLOR H. F.,
LOADER M. P. C.,
NORRIS S. J.
Publication year - 1983
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.1365-3180.1983.tb00536.x
Subject(s) - avena fatua , triclopyr , picloram , chemistry , phytotoxicity , agronomy , biology , weed control , weed
Summary In glasshouse experiments, the addition of four ‘pyridine herbicides’ (substituted picolinic and pyridyloxyacetic acids) to either diclofop‐methyl or flamprop‐methyl had little effect on wild oat ( Avena fatua ) control. This contrasts with the serious antagonisms which occur with 2, 4‐D and 2, 3, 6‐TBA. With wild and cultivated oat, l'‐methylheptyl (4‐amino‐3, 5‐dichloro‐6‐fluoro‐2‐pyridyl)oxyacetate (Dowco 433) was completely compatible with diclofop‐methyl and flamprop‐methyl, and there was evidence that its presence improved the control of wild oats. Picloram, 3, 6‐dichloropicolinic acid and triclopyr had only slight effects on phytotoxicity. The control of cleavers ( Galium aparine ) by picloram, triclopyr and Dowco 433 was not significantly reduced by addition of flamprop‐methyl. Preliminary metabolism studies suggest that picloram does not greatly increase the rate of diclofop detoxification as do 2, 4‐D and 2, 3, 6‐TBA, and the observed compatibility could well be a direct consequence of this. The absence in these greenhouse experiments of serious antagonism between the pyridine herbicides and diclofop‐methyl or flamprop‐methyl suggests that ‘tank mixes’ of these herbicides could be used for the control of both broad‐leaved weeds and wild oats.