Activity of triclopyr in Eupatorium adenophorum as influenced by surfactants and temperature
1993
Suwanketnikom, R. (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Agronomy)
Effect of surfactants and temperature on triclopyr (3,5,6-trichloro-2-pyridinyl)oxy) acetic acid) activity in Eupatorium adenophorum Spreng were studied at the Royal Ang Khang Highland Agricultural Research Station, Fang District, Chiang Mai and at the Department of Agronomy and Central Laboratory, Kasetsart University, Bangkok, Thailand. Triclopyr plus surfactants at the rate of 0.25 percent (v/v) controlled E.adenophorum better than triclopyr alone under both field and greenhouse conditions. When comparing the two surfactants used, OPEO (octylphenol ethylene oxide), a nonionic surfactant was more effective than SABS (sodium alkyl benzene sulfonate), an anionic surfactant. At 25 deg C triclopyr plus OPEO provided better control than at 15 deg C. There was a tendency to increase 14C-triclopyr absorption in plants when applied in combination with OPEO. There was 2-3 times as much 14C-triclopyr absorbed in plants at 25 deg C when compared to 15 deg C in a 12 h period. Absorbed 14C-triclopyr translocated up and down to other plant parts of E. adenophorum. The sequences of 14C-triclopyr accumulation were the treated leaf, parts below the treated leaf, part above the treated leaf and roots respectively. At 25 deg C, the amount of 14C-triclopyr found in any plant part was greater than at 15 deg C at both 1 and 5 days after treatment. At 15 or 25 deg C, there was no degradation of 14C-triclopyr in plant at 1 and 5 days after treatment. Under greenhouse condition there was some degradation of 14C-triclopyr in plant part below the treated leaf at 5 and 10 days after treatment but no degradation occurred in the other plant parts.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Kasetsart University