Vol. 12, Issue 11 (2023)

Author(s):
H Srikanth, Kamble AS, Ananda N, Shwetha BN and SN Bhat

Abstract:
A field experiment on maize was carried out during kharif, 2022 at Main Agricultural Research Station, University of Agricultural Science, Raichur. The experiment was laid out in Randomized Complete Block Design with three replications and eleven treatments. Among the different herbicide treatments, 2,4-D amine salt 58% SL @ 500 g a.i. ha^-1 at 3-4 leaf stage of weeds fb IC at 45 DAS had recorded significantly maximum population of bacteria, fungi, actinomycetes and dehydrogenase activity at both first (17.67 × 10⁶ cfu g^-1 soil, 16.00 × 10⁴ cfu g^-1 soil, 65.33 × 10³ cfu g^-1 soil and 18.99 µg TPF g^-1 soil day^-1) and second week after herbicide spray (21.33 × 10⁶ cfu g^-1 soil, 18.33 × 10⁴ cfu g^-1 soil, 71.33 × 10³ cfu g^-1 soil and 22.35 µg TPF g^-1 soil day^-1) and it was statistically comparable with application of mesotrione 48% SC @ both 96 and 120 g a.i. ha^-1 at 3-4 leaf stage of weeds alone and also when they were fb IC at 45 DAS at first and second week after herbicide spray.