Authors:S. Subbulakshmi, P. Subbian, N. Saravanan, and N. Prabakaran
A field experiment was conducted during the
(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
was high during the 1
year maize cropping period, but
became dominant when sunflower was grown after maize.
, originally the dominant sedge, was smothered by
due to zero tillage.
was the dominant weed species in maize, while
was the dominant weed species in sunflower. The proportions of
Datura fastuosa, Parthenium hysterophorus, Trianthema portulacastrum, Amaranthus viridis, Amaranthus polygamus, Flaveria austerlagica, Gynandropsis pentaphylla
were higher during the 1
year maize cropping season, while later their density was gradually reduced due to the inclusion of sunflower in the system.