Vol. 6, Issue 1 (2018)
Efficacy of pre and post emergence herbicide on weed control in kharif maize (Zea mays L.)
Author(s): Satyendra Kumar Gupta, GC Mishra and Purushottam
Abstract: An experiment was conducted at Agronomy Main Research Station, OUAT, and Bhubaneswar during kharif, 2016. The experiment was laid out in randomized block design with ten treatments and three replications. The soil of the experimental field was sandy loam in texture, acidic in reaction (pH 4.68) and available nitrogen (233.0 kg/ha), phosphorus (23.2 kg/ha) and potassium (153.1kg/ha). The results of experiment revealed that the experimental site was infested with broad leaved weeds (69.66 to 91.69 %) being higher than the grasses (7.48 to 28.10%) and sedge (0.83 to 3.19%). Amongst broad leaved weeds, Luduwigia parviflora was the dominant while in grasses, Digitaria sanguinalis was most prevalent and only one sedge weed Cyprus rotundus occurred. Hand weeding performed at 20 and 40 DAS remarkably reduced the density of grasses, sedge and broadleaved weeds along with total weed population and weed dry weight thereby improving the weed control efficiency at all the growth stages of the crop. It was comparable with herbicide combination of atrazine @ 750 g/ha+ pendimethalin @ 750 g/ha as PE at 1 DAS, pendimethalin @ 1.0 kg/ha as PE at 1 DAS with sequential application of atrazine @ 750 g/ha + 2, 4-D amine salt @ 400 g/ha as PoE at 25 DAS and atrazine @ 1.0 kg/ha as PE at 1 DAS followed by tembotrione @ 120 g/ha as PoE at 25 DAS. The crop growth and yield attributes and grain (7.0 t/ha) and Stover yield (7.57) of hybrid maize were enhanced with herbicide combination of atrazine @ 750 g/ha+ pendimethalin @750 g/ha as PE at 1 DAS. It was followed by atrazine @1.0 kg/ha as PE at 1 DAS with sequential application of tembotrione @ 120 g/ha as PoE at 25 DAS being comparable with hand weeding at 20 and 40 DAS.
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How to cite this article:
Satyendra Kumar Gupta, GC Mishra, Purushottam. Efficacy of pre and post emergence herbicide on weed control in kharif maize (Zea mays L.). Int J Chem Stud 2018;6(1):1126-1129.
