EFFECT OF CHEMICAL WEED CONTROL TREATMENTS AND INTER-ROW SPACING ON THE GROWTH AND YIELD OF SESAME (Sesamum indicum L.)
EFFECT OF CHEMICAL WEED CONTROL TREATMENTS AND INTER-ROW SPACING ON THE GROWTH AND YIELD OF SESAME (Sesamum indicum L.)
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Date
1997
Authors
Ndarubu, Abdullahi Aliyu
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Abstract
Field experiments were conducted during the 1995 and 1996 wet seasons at the Research
Farm of the Institute for Agricultural Research, Samaru, Zaria (11° 11 N; 7° 38 m; 680m above
sea level) in the northern Guinea Savanna zone of Nigeria. The study was conducted to evaluate
the effects of inter-row spacing (seed broadcast, 30, 60 and 90cm) on the efficiency of four preemergence
herbicides (imazaquin, metolachlor + metobromuron, metolachlor •+- diuron and
simazine + ametryn) each applied at two rates on sesame. The different herbicide treatments
gave varying significant effects on the performance of the crop. While metolachlor +
metobromuron at 0.75 + 0.75 and 1.0 + 1.0kg a.i./ha, imazaquin at 0.20kg a.i./ha and
metolachlor + diuron at 1.0 + 0.25kg a.i./ha provided good weed control and were well
tolerated by the crop, the application of metolachlor + diuron at 1.0 + 0.5 and 1.5 + 0.5kg
a.i./ha and also simazine + ametryn at 0.75 + 0.75 and 1.0 + 1.0kg a.i./ha were phytotoxic
to the crop resulting in significant stand and yield losses. Inter-row spacing also had significant
effect on the yield and related parameters of sesame. The highest values for number of
branches, capsules, dry matter production, seed yield per plant and seed weight were obtained
under the inter-row spacing of 90cm, while the maximum values for plant height and number
of stands were obtained under seed broadcast. However, the maximum seed yield of 401.00 and
511.26kg/ha were obtained from the application of metolachlor + metobromuron at 1.0 + 1.0kg
a.i./ha under 30cm inter-row spacing in 1995 and 1996, respectively. Yield reductions of 81
and 88% were recorded in 1995 and 1996 cropping seasons, respectively, due to unrestricted
weed growth throughout the crop life cycle
Description
A thesis submitted to the Post-graduate School,
Ahmadu Bello University, Zaria in partial
fulfilment of the requirement for the degree of
Master of Science in Agronomy.
DEPARTMENT OF AGRONOMY
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA.
12TH AUGUST, 1997
Keywords
CHEMICAL WEED,, TREATMENTS,, INTER-ROW SPACING,, SESAME,, (Sesamum indicum L.)