WEED BIOMASS AND PRODUCTIVITY OF OKRA (ABELMOSCHUS ESCULENTUS (L) MOENCH) AS INFLUENCED BY SPACING AND PENDIMETHALIN-BASED WEED MANAGEMENT
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Date
2018-09-18
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University of Belgrade
Abstract
Field trials were conducted at the Teaching and Research Farm of
the Kwara State University, Malete, Nigeria, to determine the effect of plant
spacing and weed control methods on weed infestation, growth and yield of okra
during the 2016 and 2017 cropping seasons. The experiment consisted of twelve
treatments comprising six weed control methods and two plant spacings. The
method of weed control consisted of pre-emergence application of pendimethalin at
1.0 kg a.i. ha-1
, pendimethalin at 2.0 kg a.i. ha-1
, pendimathalin at 1.0 kg a.i. ha-1 +
one supplementary hoe weeding (SHW) at 6 weeks after sowing (WAS), two hoe
weedings at 3 and 6 weeks after sowing (WAS), weeding at 4 and 8 weeks after
sowing (WAS) and a weedy check. The plant spacings were 60cm x 30cm and
60cm x 50cm. These treatments were laid out in a randomized complete block
design (RCBD) with split plot arrangements and three replications. Weed control
and plant spacing treatments were allocated to the subplots and the main plot
respectively. Results showed that a plant spacing of 60cm x 30cm minimized weed
infestation and resulted in a higher total number of pods/plot and okra fresh weight,
while pendimethalin at 1.0 kg a.i. ha-1 + one supplementary hoe weeding at 6 WAS
minimized weed infestation in the plots, and led to the highest total number of pods
and yield of okra. This combination also promoted higher economic returns.
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