Alarming increase in the incidence of<i>Cucumber mosaic virus</i>in cowpea (<i>Vigna unguiculata</i>(L.) Walp.) in northern Nigeria

Eni, A. O.; Ogunsanya, Patricia; Oviasuyi, Taiwo; Hughes, J.

doi:10.1080/03235408.2013.782218

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…Although, CPMMV has been reported to be prevalent on cowpea in Uganda (Urawu et al 2015 ), previous surveys of cowpea fields in the Savanna zones of Nigeria reported low incidence and distribution of the virus (Odedara and Kumar 2016 ), while this virus was not detected in other cowpea field surveys in Nigeria (Aliyu et al 2012 ; Eni et al 2013 ). A recent report has however categorised CPMMV among the important and most frequent seed transmitted cowpea viruses (Kumar et al 2021 ).…”

Section: Discussionmentioning

confidence: 93%

“…A survey of cowpea viruses conducted in 1991–1993 throughout all agro-ecological zones in Nigeria earlier indicated the incidence of six viruses, viz; CABMV, CYMV, CMoV, BCMV-BlCM, SBMV and CMV in single and multiple infections, with prevalence of SBMV (in 1991) and CABMV (in 1992 and 1993) (Shoyinka et al 1997 ). Another field survey in northern Nigeria confirmed the incidence of five of these viruses, with exception only to CYMV (Eni et al 2013 ). However, up-to-date information on the incidence, prevalence and distribution of the cowpea viruses is sparse in Nigeria, while this is essential for effective management of viral diseases.…”

Section: Introductionmentioning

confidence: 91%

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Updates on cowpea viruses in Southwest Nigeria: distribution, prevalence and coinfection

Ogunsola

Yusuf

Elegbeku

2022

Indian Phytopathology

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Cowpea is an important source of dietary proteins in the semi-arid regions of sub-Saharan Africa. Its productivity is constrained by several viral diseases and there are limited updates on the incidence and distribution of these diseases in Nigeria. This study assessed the distribution and prevalence of cowpea viruses in Southwest Nigeria. Field surveys were conducted in 2017 and 2018, in which a total of 600 leaf samples were randomly collected from 60 cowpea fields in four (Oyo, Ogun, Ondo and Osun) states at 15 fields per state and 10 samples per field. Disease incidence and severity were recorded while virus infections were confirmed by enzyme-linked immunosorbent assay or reverse transcription polymerase chain reaction. Viral disease symptoms of systemic mosaic, mottling, puckering, vein-banding, leaf deformation and stunted growth were observed. Highest virus incidence and severity (100% and 4.8 ± 0.4) were observed at Adeosun Avenue, Ondo state, whereas Boredun, Osun state had the least (80% and 3.8 ± 0.7), with some symptomless fields found among the states. Seven viruses, viz.: cowpea aphid-borne mosaic virus (CABMV), cowpea mild mottle virus (CPMMV), bean common mosaic virus-blackeye cowpea mosaic strain (BCMV-BlCM), cucumber mosaic virus (CMV), southern bean mosaic virus (SBMV), cowpea mottle virus (CMoV) and cowpea yellow mosaic virus (CYMV) were detected from 173 (28.8%) samples collected from 32 (53.3%) fields across the states. CPMMV was prevalent, detected from 30.0% of surveyed fields, whereas CYMV was the least prevalent (3.3%). Multiple infections of two to four viruses were observed among 12.5% of samples from 51.7% of fields. Highest incidence of single and multiple virus infections were observed in Ondo state. This updates on virus distributions in Southwest Nigeria will be useful for multiple virus resistance-breeding programs and other viral disease management strategies for improved cowpea productivity. Supplementary Information The online version contains supplementary material available at 10.1007/s42360-022-00576-8.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 91%

Updates on cowpea viruses in Southwest Nigeria: distribution, prevalence and coinfection

Ogunsola

Yusuf

Elegbeku

2022

Indian Phytopathology

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“…Vigna species, in general, are highly susceptible to many viruses as described in recent publications [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Amid Vigna infecting virus, the Cowpea chlorotic mottle virus (family Bromoviridae , genus Bromovirus )/(CCMV) and the Cowpea mild mottle virus (Order Tymovirales, family Betaflexiviridae , genus Carlavirus )/(CMMV) have emerged in the past two decades as an important threat to legume crops globally [ 16 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Silicon and Nitrate Differentially Modulate the Symbiotic Performances of Healthy and Virus-Infected Bradyrhizobium-nodulated Cowpea (Vigna unguiculata), Yardlong Bean (V. unguiculata subsp. sesquipedalis) and Mung Bean (V. radiata)

Izaguirre‐Mayoral

Brito

Baral

et al. 2017

Plants

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The effects of 2 mM silicon (Si) and 10 mM KNO3 (N)—prime signals for plant resistance to pathogens—were analyzed in healthy and Cowpea chlorotic mottle virus (CCMV) or Cowpea mild mottle virus (CMMV)-infected Bradyrhizobium-nodulated cowpea, yardlong bean and mung bean plants. In healthy plants of the three Vigna taxa, nodulation and growth were promoted in the order of Si + N > N > Si > controls. In the case of healthy cowpea and yardlong bean, the addition of Si and N decreased ureide and α-amino acids (AA) contents in the nodules and leaves in the order of Si + N> N > Si > controls. On the other hand, the addition of N arrested the deleterious effects of CCMV or CMMV infections on growth and nodulation in the three Vigna taxa. However, the addition of Si or Si + N hindered growth and nodulation in the CCMV- or CMMV-infected cowpea and yardlong bean, causing a massive accumulation of ureides in the leaves and nodules. Nevertheless, the AA content in leaves and nodules of CCMV- or CMMV-infected cowpea and yardlong bean was promoted by Si but reduced to minimum by Si + N. These results contrasted to the counteracting effects of Si or Si + N in the CCMV- and CMMV-infected mung bean via enhanced growth, nodulation and levels of ureide and AA in the leaves and nodules. Together, these observations suggest the fertilization with Si + N exclusively in virus-free cowpea and yardlong bean crops. However, Si + N fertilization must be encouraged in virus-endangered mung bean crops to enhance growth, nodulation and N-metabolism. It is noteworthy to see the enhanced nodulation of the three Vigna taxa in the presence of 10 mM KNO3.

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Synthetic mulches reduce the incidence of aphid-borne viruses and weeds in cowpea fields (effect of mulches on aphid-borne viruses)

Kareem

Adegbite

Nsa

et al. 2021

Archives of Phytopathology and Plant Protection

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Alarming increase in the incidence ofCucumber mosaic virusin cowpea (Vigna unguiculata(L.) Walp.) in northern Nigeria

Cited by 4 publications

References 17 publications

Updates on cowpea viruses in Southwest Nigeria: distribution, prevalence and coinfection

Updates on cowpea viruses in Southwest Nigeria: distribution, prevalence and coinfection

Silicon and Nitrate Differentially Modulate the Symbiotic Performances of Healthy and Virus-Infected Bradyrhizobium-nodulated Cowpea (Vigna unguiculata), Yardlong Bean (V. unguiculata subsp. sesquipedalis) and Mung Bean (V. radiata)

Synthetic mulches reduce the incidence of aphid-borne viruses and weeds in cowpea fields (effect of mulches on aphid-borne viruses)

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