Abstract:
Weed control management
has a vital role in increasing cotton yield
and yield components. In cotton crop weed,
infestation may harm significant growth and
yield loses. To control the weeds under field
conditions in cotton crop, different
herbicides were selected with different dose
levels. Response of various post emergence
herbicides at different levels, i.e. Round up
490 G/L at the rate of 4.7 L ha-1, 2.7 L ha-1
and 1.5 L ha-1 (Glyphosate), Gramoxone
20EC (Paraquat) at the rate of 2.5 L ha-1 and
untreated (Control) were field experimented
against cotton cultivar CIM-473 under field
condition at Agronomic Research Area of
Central Cotton Research Institute (CCRI)
Multan, Pakistan. Significant control of
weeds, i.e. number of weeds m-2, fresh weed
biomass in g m-2, dry weed biomass in g m-2
and increase in yield and yield contributing
factors, like number of bolls plant-1, cotton
boll weight (g), final cotton plant height
(cm) and seed cotton yield (kg ha-1) were
observed. The field data for weed control in
term of numbers, fresh and dry weight was
observed after 10, 20 and 30 days of
sowing. It was indicated that the highest
significant yield, total number of bolls per
plant, fresh weed biomass, dry weed
biomass, plant height and weed control were
obtained by using herbicide Round up
(Glyphosate) at the rate of 4.7 L ha-1, as
compared to the other treatments with
different application rates including
untreated (control). Average boll weight
was not significant among treatments, but
significant against control. Cost benefit
analysis showed that the highest net profit
was obtained by the Round up 490 G/L,
when treated @ 4.7 L ha-1 than all other
treatments.
