Arukwe And Ekeleme


Arukwe and Ekeleme

Journal of Agricultural Sciences

Vol. 10(2), pp. 71-85, 2020

ISSN: 2276-7770

Copyright ©2020, the copyright of this article is
retained by the author(s)







Effect of cassava-sweet potato intercrops patterns and weed control
methods on weed suppression.



Udodirioha E. 1,* and Ekeleme Friday 2



1Department of
Agriculture and Natural Resources, Umuahia North Local Council, Umuahia.

2Department of Plant
Health Management, Michael Okpara University of Agriculture, P.M.B. 7267,
Umudike. Nigeria.






Article No.:01282014

Type: Research



Field trials were conducted to investigate
complementary weed control potential of sweet potato on cassava in 2015,
2016 and 2017 cropping seasons at the National Cereal Research Institutes’
farm, (NCRI), Amakama (07˚29′N latitude and 05˚28΄E longitude), South
Eastern Nigeria. The study was laid out in a split plot arrangement in a
Randomized Complete Block Design (RCBD) with three replicates. The main
plots consisted of intercrop patterns which included two populations of
sweet potato (10,000 and 20,000 plants ha-1) between rows of cassava,
planted at 0, 4 and 8 weeks after planting cassava  (WAP), sole cassava (SC) and sole sweet
potato (SS), The sub-plots were four weed control treatments viz
pre-emergence application of S-metolachlor+atrazine at 1.16+1.48 kg a.i ha-1
alone (P), S-metolachlor+atrazine at 1.16+1.48 kg a.i ha-1 followed by
supplementary hoe weeding at 8WAP (PHW1), three hoe weedings at 4, 8 and 12
WAP (3HW) and a weedy check (0W). Results indicated that Cassava
intercropped at the same time with sweet potato at 20,000 plant ha-1 (CS200)
significantly reduced weed density and dry matter compared with SC which
gave the poorest weed control. Weed density and dry matter were higher with
cassava+sweet potato introduced at 8 WAP at both populations (CS108 and
CS208) comparable to SC. There were statistically significant differences in
weed growth between the different weed control methods. PHW1 significantly
suppressed weed growth as effectively as 3HW when compared to 0W. The weedy
check (0W) and P recorded the poorest weed control and performance of these
crops at harvest. Although weed density and drymatter was significantly
reduced by CS200 and PHW1 independently, results from this study suggested
that CS200 combined PHW1 could provide a sustainable integrated weed
management system than sole cassava, introducing the sweet potato at 8 WAP
or herbicide treatment alone in the study area.


Accepted:  29/01/2020




*Corresponding Author

Arukwe Udodirioha E.


Phone: +234-80-68294898



Seedling emergence; Cropping pattern; Pre-emergence;
Intercropping; Integrated weed management




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Cite this Article: Arukwe UE; Ekeleme F (2020). Effect of
cassava-sweet potato intercrops patterns and weed control methods on weed
Journal of Agricultural Sciences
10(2): 71-85.



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