Efficacy of Metamifop
on weed dynamics and productivity of cotton (Gossypium hirsutum L.) and its residual
impact on succeeding green gram (Vigna radiata L.)
Mandi Hiralal, Mallik Himadri Sekhar, Rano Debopriyo, Poddar Parthendu and Paul
Tarun
International Journal of Agricultural Sciences and
Veterinary Medicine;
Vol. 13(2); 5-11;
doi: https://doi.org/10.25303/1302ijasvm05011; (2025)
Abstract
Cotton is the premier commercial crop, grown mainly for its silver fibre. Its slow
initial growth and heavy rainfall received during rainy months facilitate abundant
population and growth of composite weeds. Due to unpredictability of rains entailing
to non-workable conditions of soil and tedious, uneconomical manual weeding, chemical
weed control is the viable alternative in cotton. To combat the issue, a consecutive
two-year field experiment was conducted to study the efficacy of Metamifop on weed
dynamics, growth and seed cotton yield of cotton and its residual impact on succeeding
green gram. The experiment was laid out in randomized block design along with seven
treatments namely, T1- Metamifop 10% EC @ 800 ml/ha; T2- Metamifop 10% EC @ 1000
ml ha-1; T3- Metamifop 10% EC @ 1200 ml ha-1; T4- Metamifop 10% EC (Std. Market
Sample) @ 1000 ml ha-1; T5- Pyrithioback sodium 10% EC @ 2000 ml ha-1; T6- Hand
weeding (Weed free twice) at 30 and 60 days after sowing and T7- control, replicated
thrice.
Results showed that minimum weed density, higher WCE, growth, yield attributes and
seed cotton yield of cotton recorded highest under T6 followed by T3 and least at
T7. Among the herbicide treatments, seed cotton yield recorded highest with under
T3 (2.22 and 2.17 t ha-1) followed by T4 (2.07 and 2.09 t ha-1). Highest B:C ratio
was achieved under T4 (1.44 and 1.47) followed by T3 (1.43 and 1.46), across the
years. The herbicide treatments did not show any phytotoxicity on the cotton as
well as succeeding green gram. Spraying of Metamifop 10% EC showed higher efficacy
at 1200 ml ha-1 and 1000 ml ha-1 as post-emergence herbicide. These treatments reinforce
the potential of cotton as well as succeeding crop without affecting germination,
growth and finally yield with sustainable approach.
