Critical Time for Weed Removal in Corn as Influenced by Planting Pattern and PRE Herbicides

Determining the critical time for weed removal (CTWR) is essential development of an integrated management plan. Therefore, field experiments were conducted to evaluate effects two planting patterns (standard and twin-row) with without PRE-applied herbicides on CTWR in corn. Experiments laid out a split-plot arrangement main plots: (i) standard row (SRP) that 70 cm wide, (ii) twin-row (TRP) 50 distance between each set double rows. Each plot was divided into sub-plots (with PRE herbicides). The sub-sub-plots consisted seven timings herbicides, tank mixes utilized (S-metolachlor (1.44 kg a.i. ha−1) + terbutylazine (0.75 ha−1)). similar both SRP TRP systems, where it around V1 V2 (16 19 d after emergence (DAE)) growth stages. use delayed V4 V10 (25 58 DAE) stages up V11 (60 stage TRP. These results clearly indicate are important protecting corn yields regardless pattern. In more meteorologically favorable seasons (sufficient heat precipitation) sowing plants produce their biological maximum fact over number per unit area (SRP = 80,000 ha−1, 93,900 provide higher variants thus advantage system can be justified.