ANITA JASWAL*, ARSHDEEP SINGH, SHIMPY SARKAR AND MANINDER SINGH
Department of Agronomy, School of Agriculture, Lovely Professional University, Phagwara-144 411 (Punjab),
India
*(e-mail : anita.27139@lpu.co.in; Mobile : 95017 03516)
(Received : March 15, 2022; Accepted : April 11, 2022)
ABSTRACT
A field experiment was conducted during spring season of 2021 to study the effect of herbicides on weed
control efficiency and yield attributes in greengram. The experiment consisting of seven treatments
comprising four herbicide treatments (Pendimethalin 30 EC @ 500 g a.i./ha, pendimethalin 30 EC @
1000 g a.i./ha, imazethapyr 10% SL @ 50 g a.i./ha and imazethapyr 10% SL @ 75 g a.i./ha) compared with
hand weeding, weed free check and unweeded control. The weed species observed in experimental farm
were Digitaria, Dactyloctenium aegyptium, Cyperus iria, Cyperus rotundus (Nut grass), Cyperus difformis and
Cyperus compressus, Chenopodium album, Parthenium hysterophorus, Medicago polymorpha and Anagallis
arvensis. The results showed that the grasses were predominant weed species followed by broadleaf
weeds and sedges. Significantly lower weed density (2.27/m2) and weed dry weight/m2 (3.20 g) were recorded in weed free plot. The highest weed control efficiency (91%) was obtained with imazethapyr
10% SL @ 50 g a.i./ha. The maximum plant height (55 cm), number of branches per plant (16), number of
leaves per plant (94.33), pod length (9.57 cm), number of pods per plant (24), number of seeds/pod
(11.67), 1000-grain weight (44 g), grain yield (1100 kg/ha), straw yield (2116.67 kg/ha) and harvest index
(36.45%) were recorded in weed free plots followed by hand weeding plot. The control plot produced the
maximum number of weeds and the minimum plant height, number of branches/plant, number of leaves/
plant, pod length (cm), number of pods/plant, number of seeds/pod, 1000-grain weight, grain yield,
straw yield and harvest index.
Key words : Weed free check, imazethapyr, pendimethalin, yield