Chemical control, Chrysanthemum, Weed management

A field experiment was laid out in randomized block design  with eleven treatments comprising of  ifferent pre-emergence herbicides, viz. butachlor  1.0 kg/ha, butachlor  1.0 kg/ha + 2 hand weedings, butachlor  1.5 kg/ha, pendimethalin  0.75 kg/ha, pendimethalin  0.75 kg/ha + 2 hand weedings, pendimethalin  1.0 kg/ha and atrazine  1.0 kg/ha, atrazine  1.0 kg/ha  + 2 hand weedings, atrazine  1.5 kg/ha besides weed-free (where plots were kept weed free with regular hand weeding) and weedy check (where no cultural practices were followed to control weeds) as control. Results revealed a significant enhancement in flower yield with weed free and butachlor  1.0 kg/ha + 2 hand weedings which were superior over weedy check. The highest weed control efficiency (100%) was also observed in weed free treatment, followed by butachlor  1.0 kg/ha + 2 hand weedings (84.5%) and atrazine  1.0 kg/ha + 2 hand weedings (80.1%). Application of butachlor 1.0 kg/ha along with hand weedings proved to be economical.