Vol. 11, Issue 7 (2022)

Author(s):
Uditi Dhakad, DL Yadav, RK Yadav and Pratap Singh

Abstract:
Herbicide application for controlling weeds in soybean crop is an important part of plant protection in agriculture. In this study, among the various application of herbicides, maximum leaf area index, chlorophyll content, nodules/plant, dry weight/plant were recorded by fomesafen + fluazifop-p-butyl 220 G A.I./ha, propaquizafop + imazethapyr 125 G A.I./ha, and sodium acifluorfen + Clodinafop-propargyl 245 G A.I./ha as compared to other applied herbicides. Pre-emergence application of pendimethalin + imazethapyr 960 G A.I/ha and pendimethalin 1.0kg A.I/ha significantly reduced dehydrogenase enzyme activity compared to control. However, maximum phosphatase enzyme activity (30.17μg PNP/g soil/hr) was observed under two hand weeding followed by fomesafen + fluazifop-p-butyl 220g A.I./ha. All herbicidal weed control measures applied as pre-emergence and post- emergence did not influence total bacterial, fungi, actinomycetes populations. Herbicides application had not significant effect on the soil microbial population and soil enzymes.