RYMV Serological Detection in Insect Vector, Distribution and Transmission to Rice Cultivars

Onasanya, A.; Joseph, A.; Olufolaji, D. B.; Ekperigin, M. M.; Séré, Y.; Nwilene, F. E.; Kiepe, Paul; Onasanya, R.O.

doi:10.3923/tasr.2012.46.56

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…Several cercopids species are found on upland rice worldwide: Deois schach (Fabricius), Denoplux nigropunctata (Stål), Deois flexuosa (Walker), Deois flavopicta (Stål), Deois incompleta (Walker), Zulia entreriana (Berg), Mahanarva fimbriolata (Stål), Aeneolamia spectabilis (Distant,), Aeneolamia varia (Fabricius), Aeneolamia postica (Walker), Abidama producta (Walker), Locris maculata (Fabricius) and Locris rubra (Fabricius) (Dean, 1978;Rossetto et al, 1978;Ferreira and Martins, 1984;Nilakhe, 1985;Ferreira, 2006;Sere et al, 2008;Nwilene et al, 2009;Onasanya et al, 2012;Koudamiloro et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Reports of new wing color polymorphism and taxonomic information to cercopids (Auchenorrhyncha: Cercopidae) from upland rice crop, Pará State, Brazil

et al. 2018

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Cercopidae is one of the largest families of the spittlebug superfamily Cercopoidea. Most spittlebugs species are characterized by bright color patterns. Thus, this study evaluated for the first time the Cercopidae species collected in rice crops, Novo Progresso, Pará state, Brazil. Insects were collected weekly between November/2010 and March/2011 from areas without (WA) and with agrochemical applications (AA). Four species were recorded: Deois incompleta (Walker, 1851) (71 specimens in WA area and 50 in AA area); Mahanarva spectabilis (Distant, 1909) (39 specimens in WA area and 39 in AA area); Mahanarava tristis (Fabricius, 1803) (26 specimens in WA area and 20 in AA area); Zulia pubescens (Fabricius, 1803) (11 specimens in WA area and four in AA area). The species collected displayed pronounced color polymorphism when compared with the color patterns of the same species from other regions. This makes correct identification more difficult for these species. Therefore, taxonomic and diagnostic informations provided in this study will help in the correct identification, control and monitoring of these insects in future studies. Besides that, we recommend monitoring in rice fields and further study of the biology and ecology of cercopids in Brazil to assess the potential of these species as rice pests. Keywords: Cercopoidea, Deois incompleta, Mahanarva spectabilis, Mahanarva tristis, Zulia pubescens. Registro de novos polimorfismos de cores de asas e informações taxonômicas IntrodutionThe rice crop (Oryza sativa L.) (Poales: Poaceae) occupies approximately 10% of the world arable land. Rice cultivation began in South Asia and at present rice is grown in more than 110 countries (Heinrichs, 1994;IRRI, 2006). Brazil is the largest producer of rice outside Asia, even with its recent cultivation compared to the Asian continent (Azambuja et al., 2004, FAO, 2003. According to the Brazilian Harvest Monitoring 2012/2013 report of the Companhia Nacional de Abastecimento/National Supply Company (Conab, National Company of Food Supply), the Brazilian states with the highest production (Rio Grande do Sul, Santa Catarina, Mato Grosso, Maranhão, Tocantins and Pará) account for approximately 80% of the national rice production (Ferreira and Villar, 2004;IRGA, 2009). Some environmental factors interfere negatively on crop production; among these, insects are responsible for much of the losses from germination to harvest, mainly due to mechanical damage and the transmission of plant pathogens (Ferreira et al., 2001;SOSBAI, 2005;Martins et al., 2009).Insects in the hemipteran suborder Auchenorrhyncha commonly occur in rice crops. Twenty-two planthopper species in the family Delphacidae and 34 leafhopper species in the family Cicadellidae occur in rice in South and South-East Asia (Wilson and Claridge, 1991). Several spittlebug species (family Cercopidae) are also known to damage rice crops. Some planthoppers can damage rice plants by direct feeding, which causes a symptom known as 'hopperburn'. These insects have been m...

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Section: Discussionmentioning

confidence: 99%

Reports of new wing color polymorphism and taxonomic information to cercopids (Auchenorrhyncha: Cercopidae) from upland rice crop, Pará State, Brazil

et al. 2018

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“…Thus, virulent isolates were obtained experimentally by amino acid substitution in Vpg protein (Poulicard et al, 2010). Onasanya et al (2006Onasanya et al ( , 2012, studying RYMV variability in different localities in Côte d'Ivoire, showed the existence of several pathotypes of RYMV. Most interactions observed between isolates of RYMV and varieties was significant using ANOVA test suggesting that the RYMV isolates in most rice localities differ by their virulence (Adugna, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Natural and transgenic sources of resistance were reported (Sorho et al, 2005). Many studies reported the existence of different strains of the virus (Sorho et al, 2005;Amancho et al, 2009 ;Onasanya et al, 2012;Issaka et al, 2011). Many resistance genes were described and a major gene of resistance against RYMV was identified in the O. sativa resistance variety Gigante (Albar et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Impact of eight isolates of Rice Yellow Mottle Virus (RYMV) from Gagnoa (Côte d’Ivoire) on rice (<i>Oryza</i> sp) cultivars production

Soko¹,

Koutoua²,

koffi³

et al. 2016

Int. J. Bio. Chem. Sci

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Rice yellow mottle virus, of the genus Sobemovirus, causes a major disease in Africa especially in the lowland and irrigated rice ecologies. Yield losses due to the virus were estimated between 5-100% and depend on genotype. This study, conducted in a screen house, aimed at assessing the impact of eight RYMV isolates from a restrictive environment Gagnoa (Côte d'Ivoire) on 10 differential rice varieties. The plants were inoculated manually by rubbing the leaves from the leaf base to the tip with fingers moistened with inoculum. Virus content and percentage yield reduction of different rice cultivars have been assessed. Result showed that an important variability was observed in the reaction of different rice genotypes infected by different isolates of RYMV. In susceptible cultivars Bouaké 189, PNA647F4-56 and H232-44-1-1 virus content and yield reduction varied respectively from 0.08 to 0.264 and 20 to 95%. In resistant cultivars, Gigante, Lac 23, Morobérékan and Faro 11, virus content and yield reduction varied respectively from 0.03 to 0.188 and 5 to 17%. The lowest virus content and yield reduction was observed with the isolate 7 from upland rice. The significant difference in the interaction observed between the different genotypes of rice and isolates of RYMV suggested the existence of different strains of RYMV within a restrictive environment.

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RYMV Serological Detection in Insect Vector, Distribution and Transmission to Rice Cultivars

Cited by 2 publications

References 18 publications

Reports of new wing color polymorphism and taxonomic information to cercopids (Auchenorrhyncha: Cercopidae) from upland rice crop, Pará State, Brazil

Reports of new wing color polymorphism and taxonomic information to cercopids (Auchenorrhyncha: Cercopidae) from upland rice crop, Pará State, Brazil

Impact of eight isolates of Rice Yellow Mottle Virus (RYMV) from Gagnoa (Côte d’Ivoire) on rice (<i>Oryza</i> sp) cultivars production

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