Evaluation of Formulated Mixtures of Propanil plus Triclopyr for Post-Emergence Weed Control in Lowland Rice Production

Abstract

: A formulated mixture of propanil + triclopyr was evaluated at 2, 3 and 4l/ha along side with a check chemical (Orizoplus^R made up of propanil + 2, 4 – D Amine) in 2005 and 2006. Weedy check and 2 hand weeding at 21 and 42 days after transplanting were included among the treatments. The experiment was done in a Randomized Complete Block Design with three replicates at the experimental field of National Cereals Research Institute, Edozhigi and Badeggi located at Lat. 09^o 45N; Long 06^o 7E, ALT 50.57 MSL. The variety of rice used was FARO 52 commonly known as WITA 4. Significant difference occurred in the level of weed control. Propanil + triclopyr though controlled weeds; the control level was significantly lower than the check Orizoplus^R in each respective application rate. There was no phytotoxic effect of the herbicides on rice, indicating that the hebicides are not injurious to rice crop. As post-emergence herbicide in lowland rice, formulated mixture of propanil + triclopyr is recommended to be applied at 3 – 4l/ha.