Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

The absorption and translocation of fenoxaprop-ethyl and imazamethabenz-methyl were investigated in wild oat (Avena fatua L.) plants grown under different temperature and light intensity conditions by using 14C tracer techniques. The phytotoxicity of both herbicides, applied as individual droplets,...

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Bibliographic Details
Published in:Journal of plant growth regulation 1996, Vol.15 (2), p.57-62
Main Authors: Xie, H.S. (Ag-Quest, Inc., Minto, Manitoba, Canada.), Hsiao, A.I, Quick, W.A
Format: Article
Language:English
Subjects:
ABSORCION
ABSORPTION
AVENA FATUA
Biological and medical sciences
Chemical control
DESHERBAGE
ESCARDA
FENOXAPROP
FEUILLE
FISIOLOGIA VEGETAL
FITOTOXICIDAD
Fundamental and applied biological sciences. Psychology
HERBICIDAS
HERBICIDE
HOJAS
ISOTOPE RADIOACTIF
LUMIERE
LUZ
OMBRE
Parasitic plants. Weeds
PHYSIOLOGIE VEGETALE
Phytopathology. Animal pests. Plant and forest protection
PHYTOTOXICITE
RACINE
RADIOISOTOPOS
RAICES
SECHERESSE
SEQUIA
SOMBRA
TALLO
TEMPERATURA
TEMPERATURE
TIGE
Weeds
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Summary:The absorption and translocation of fenoxaprop-ethyl and imazamethabenz-methyl were investigated in wild oat (Avena fatua L.) plants grown under different temperature and light intensity conditions by using 14C tracer techniques. The phytotoxicity of both herbicides, applied as individual droplets, was also determined under similar environments. The absorption of fenoxaprop-ethyl and imazamethabenz-methyl was increased by high temperature (30/20 degrees C) and to a lesser extent by 70% shading; low temperature (10/5 degrees C) had limited effect on the absorption. The basipetal translocation of fenoxaprop-ethyl was not affected by high temperature, and the increase in imazamethabenz-methyl translocation at high temperature was likely the result of the increased absorption. Low temperature decreased total translocation and translocation efficiency in both fenoxaprop-ethyl and imazamethabenz-methyl. Low light intensity tended to reduce the efficiency of basipetal translocation of both herbicides. Fenoxaprop-ethyl phytotoxicity was reduced by high temperature but not by low temperature. Temperature had little effect on imazamethabenz-methyl effectiveness. Under 70% shading, the phytotoxicity of both herbicides was enhanced
ISSN:0721-7595
1435-8107
DOI:10.1007/BF00192932