Department of Agronomy, Punjab Agricultural University, Ludhiana-141 004, India.
Studies were conducted for three years from 1990–91 to 1992–23 at Punjab Agricultural University, Ludhiana to find out the chemical weed control schedule for linseed. Isoproturon (0.75 and 0.94 kg/ha) pre-emergence and post-emergence (before and after first irrigation) and 2, 4-D sodium salt (0.5 and 0.75 kg/ha) were tried. Postemergence application before irrigation was more safe as compared to application after irrigation. Isoproturon degraded to non-detectable level in the plants by 90 days. Isoproturon pre- or post-emergence provided effective control and yielded significantly higher than unweeded control. 2, 4-D alone or in combination with isoproturon was phytotoxic and yielded lower.
