ARSHDEEP SINGH, SHIMPY SARKAR*, ANITA JASWAL AND MANINDER SINGH
Department of Entomology, School of Agriculture, Lovely Professional University, Phagwara-144 411 (Punjab),
India
*(e-mail : shimpy.23645@lpu.co.in; Mobile : 97328 62186)
(Received : March 1, 2022; Accepted : March 25, 2022)
ABSTRACT
The aim of the study was to evaluate the performance of pre- and post-emergence herbicides to control
weeds and their effect on growth and yield of rice established by transplanting in kharif season of 2020
at research farm of Lovely Professional University. The experiment was laid out in randomized block
design with nine treatments. The study revealed that hand weeding followed by bensulfuron methyl
reduced weed dry weight by 90-97% compared to non-treated weedy plots. On the other hand, bispyribac
sodium reduced the density of grassy weeds, whereas bensulfuron methyl reduced the density of sedges
and broad-leaf weeds. Maximum number of panicles, filled grains, panicle length and 1000-grain weight
were observed under hand weeding followed by Bensulfuron methyl. Bensulfuron methyl @ 55 g a.i./ha
achieved yield (5764 kg/ha) close to those of the weed-free treatments (5914 kg/ha). Among the herbicide
treatments, application of bispyribac sodium @ 35 g a.i./ha produced low grain yield similar to the nontreated crop (3853 kg/ha). The results suggested that bensulfuron methyl was the most effective preemergence herbicide in puddled transplanting system.
Key words : Bensulfuron methyl, broad-leaf weeds, grasses, pre-emergence herbicides, post-emergence
herbicides, sedges