Interaction of Prometryne and Phorate on Bean

The absorption by bean (Phaseolus vulgaris L. ‘Black Valentine’) of 2,4-bis-(isopropylamino)-6-(methylthio)-s-triazine (prometryne) at 1 μM concentration was increased in the presence of 10, 1, or 0.1 μM O,O-diethyl S-(ethylthio) methyl phosphorodithioate (phorate). An increase in absorption of 10 μ...

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Bibliographic Details
Published in:Weed science 1972-01, Vol.20 (1), p.89-92
Main Authors: Parks, John P., Truelove, Bryan, Buchanan, Gale A.
Format: Article
Language:English
Subjects:
Ethanol
Herbicides
Insecticides
Mitochondria
Pesticides
Phosphates
Phytotoxicity
Plants
Respiration
Seedlings
weed science
weeds
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Summary:The absorption by bean (Phaseolus vulgaris L. ‘Black Valentine’) of 2,4-bis-(isopropylamino)-6-(methylthio)-s-triazine (prometryne) at 1 μM concentration was increased in the presence of 10, 1, or 0.1 μM O,O-diethyl S-(ethylthio) methyl phosphorodithioate (phorate). An increase in absorption of 10 μM prometryne with addition of 1 μM phorate was recorded after 72 hr, but no increase was seen after 96 hr of absorption. Both prometryne and phorate inhibited state 3 respiration of mitochondria isolated from 6-day-old bean hypocotyls. Inhibition increased with increasing pesticide concentrations. When the pesticides were applied simultaneously, no interactions affecting state 3 respiration were observed. Neither prometryne nor phorate alone significantly affected phosphate accumulation by bean shoot mitochondria.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500035025