Shina SALIHU 
National Cereals Research Institute Badeggi, Ibadan Research Station
– Nigeria
Department of Crop Protection, College of Plant Science and Crop
Production, Federal University of Agriculture Abeokuta –
Nigeria
Clement Gboyega AFOLABI
Department of Crop Protection, College of Plant Science and Crop
Production, Federal University of Agriculture Abeokuta –
Nigeria
Mariam Olugbemileke OTUSANYA
Department of Crop Protection, College of Plant Science and Crop
Production, Federal University of Agriculture Abeokuta –
Nigeria
David Kolawole OJO
International Institute of Tropical Agriculture, Ibadan –
Nigeria
Nahemiah DANBABA
National Cereals Research Institute Badeggi, Ibadan Research Station
– Nigeria
Shakiru Adewale KAZEEM
General and Biotechnology Unit, Nigeria Agricultural Quarantine
Service, Moor Plantation, Ibadan – Nigeria
https://doi.org/10.47743/jpd.2022.29.1.905
Keywords: Cowpea mild mottle virus, Fusarium
blight, Fusarium oxysporum, incidence and severity, leaf
blight, resistant.
Abstract: Nigeria is the largest producer and
consumer of soybean in Sub-Saharan Africa with a low yield of
less than 1 ton per hectare. Plant diseases play a major role
in yield reduction for the crop. The study was to investigate
the incidence and severity of fungal and common viral diseases
of some soybean lines and determine their effects on soybean yield.
Nineteen newly developed soybean lines with two local checks were
evaluated. Fungal isolates were identified using cultural and
morphological characteristics while Antigen Coated Plate-Enzyme-Linked
Immunosorbent Assay was used for detecting viruses. Data were
subjected to Analysis of Variance and means were separated at
P = 0.05 using Duncan’s Multiple Range Test. Eight fungi
isolated from diseased soybean plants were Fusarium oxysporum,
Choanephora infundibulifera, Colletotrichum gloeosporioides,
Culvularia spp., Fusarium verticilloides, Aspergillus
flavus, Lasiodiplodia theobromae and Pestalotia
spp., while the common viral symptom on the field was mosaic and
mottling. F. oxysporum recorded the highest frequency
of occurrence of 40.91% and 22.30%, in both years. F. oxysporum
and C. infundibulifera showed characteristics symptoms
of blight when used for pathogenicity on both checks. The soybean
lines differed significantly [P = 0.05] in disease incidence and
severity for both fungi and viral diseases. All lines were positive
for Cowpea mild mottle virus [CPMMV] in 2016. All the lines evaluated
were moderately resistant to leaf blight disease. The study concluded
that these lines were tolerant to all observable diseases occasioned
by their abilities to produce higher grain yield compared with
the local checks, despite the high disease incidence and severity.
How to cite this article:
SALIHU S., AFOLABI C. G., OTUSANYA M. O., OJO D. K., DANBABA N.
& KAZEEM S. A. 2022. Incidence and severity of fungal and
common viral diseases of some soybean lines in a derived Guinea
Savannah agro-ecology. J. Plant Develop. 29:
159-170.
https://doi.org/10.47743/jpd.2022.29.1.905
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