Tarannum and J. Nambi, A. Sundari, A.P. Srinivasaperumal and K.R. Sarvanan
Abstract
The field experiments were conducted at Annamalai University Experimental Farm, Department of Agronomy, Faculty of Agriculture, Annamalai Nagar, Tamil Nadu, India. The first crop of maize during rabi and the second crop redgram was sown during summer seasons of 2024 and 2025. Maize variety P3302 and VBN (Rg3) variety of red gram were taken in the experiments. Main plot includes four tillage practices viz., M1: maize- red gram (ZT- CT), M2: Maize - red gram (CT -ZT), M3:maize- red gram (ZT-ZT) and M4: maize- red gram (CT- CT) and sub plot includes Four weed management practices viz. S1- Two hand weeding on 15 and 30 DAS in both maize and redgram, pre emergence application of metolachlor @ 1.25 a.i kg ha -1+ hand weeding on 30 DAS in maize and Pre emergence application of pendimethalin 0.75 kg ha -1 + hand weeding on 30 DAS in red gram (S2), Pre emergence application of metolachlor @ 1.25 a.i kg ha-1 + post Emergence application of Halosulfuron methyl + atrazine @ 0.596 a.i kg ha-1 in maize and Pre emergence of Pendimethalin 0.75 a.i kg ha-1+ post emergence application of quizalopethyl +imazethapyr @ 0.10g a.i kg ha-1 (S3) and unweeded control (S4) were allocated in a split-plot design replicated thrice. The findings indicated that weed parameters and yield of maize- redgram were markedly influenced by the different tillage and weed management practices. Among the assessed tillage practices CT-CT (M4) resulted in lower weed count, higher weed control efficiency and greater values of growth and parameters in both the crops. Concerning the array of weed management practices the treatment Pre emergence application of metolachlor @ 1.25 a.i kg ha -1+ hand weeding on 30 DAS in maize and Pre emergence application of pendimethalin 0.75 kg ha -1 + hand weeding on 30 DAS in red gram (S2) resulted in the lower weed count maximum weed control efficiency and higher values yield parameters in both the crops which was at par with pre emergence application of metolachlor @ 1.25 a.i kg ha-1 +Post Emergence application of halosulfuron methyl + atrazine @ 0.596 a.i kg ha-1 in maize and Pre emergence of pendimethalin 0.75 a.i kg ha-1+ post emergence application of quizalopethyl +imazethapyr @ 0.10g a.i kg ha-1 (S3). In terms of interactions CT-CT with Pre emergence application of metolachlor @ 1.25 a.i kg ha -1+ hand weeding on 30 DAS in maize and Pre emergence application of pendimethalin 0.75 kg ha -1+ hand weeding on 30 DAS in red gram (M4S2) was registered as best treatment which was on par with CT-CT along with Pre emergence application of metolachlor @ 1.25 a.i kg ha-1+ post emergence application of halosulfuron methyl + atrazine @ 0.596 a.i kg ha-1 in maize and pre emergence of pendimethalin 0.75 a.i kg ha-1+ post emergence application of quizalopehyl +Imazethapyr @ 0.10g a.i kg ha-1 (M4S3), whereas the least values were obtained under ZT-ZT with unweeded control (M3S4)in both the crops.