Acta Agronomica Hungarica
Volume/Issue:
Volume 57: Issue 2
Weed shift in a maize ( Zea mays L.) — Sunflower ( Helianthus annuus L.) cropping system
Authors: S. Subbulakshmi 1 , P. Subbian 1 , N. Saravanan 1 , and N. Prabakaran 1
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  • 1 Tamil Nadu Agricultural University Coimbatore India
DOI:
https://doi.org/10.1556/AAgr.57.2009.2.2
Page Count:
111–117
Publication Date:
01 Jun 2009
Online Publication Date:
10 Jun 2009
Article Category:
Research Article
Restricted access

A field experiment was conducted during the kharif (June–September) and rabi (October–January) seasons of 2005–2006 to study the effect of a maize — sunflower cropping system on the weed flora shift. The results revealed a change in weed species, i.e. the appearance of new species and the elimination of certain weed species due to the cropping system. The density of Dinebra retroflexa was high during the 1 st year maize cropping period, but Panicum repens became dominant when sunflower was grown after maize. Cyperus rotundus , originally the dominant sedge, was smothered by Cynodon dactylon due to zero tillage. Dactyloctenium aegyptium was the dominant weed species in maize, while Parthenium hysterophorus was the dominant weed species in sunflower. The proportions of Datura fastuosa, Parthenium hysterophorus, Trianthema portulacastrum, Amaranthus viridis, Amaranthus polygamus, Flaveria austerlagica, Gynandropsis pentaphylla and Portulaca quadrifida were higher during the 1 st year maize cropping season, while later their density was gradually reduced due to the inclusion of sunflower in the system.

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Cover Acta Agronomica Hungarica
Acta Agronomica Hungarica
Print ISSN:
0238-0161
Online ISSN:
1588-2527
Keywords:
maize; sunflower; weed shift; relative density; cropping system

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