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Nilsa A. Bosque-pérez - One of the best experts on this subject based on the ideXlab platform.

  • Eight decades of maize streak virus research.
    Virus Research, 2000
    Co-Authors: Nilsa A. Bosque-pérez
    Abstract:

    Abstract Maize streak virus (MSV) (genus Mastrevirus; family Geminiviridae) causes what is considered the most important and widespread disease of maize in sub-Saharan Africa. Maize streak was named by Storey in 1925. Since his classical work on the virus and its leafhopper vectors of the genus Cicadulina China, MSV has been the subject of intensive research. Aspects concerning the geographical distribution, virus diversity, molecular characterization, vector–virus relationships and resistance breeding are reviewed. Special emphasis is placed on recent studies of MSV ecology and epidemiology in West Africa.

  • Biology of Cicadulina leafhoppers and epidemiology of maize streak virus disease in West Africa
    South African Journal of Plant and Soil, 1999
    Co-Authors: Nilsa A. Bosque-pérez, I. W. Buddenhagen
    Abstract:

    Studies have been conducted in Nigeria on biology of Cicadulina leafhopper vectors of maize streak virus (MSV), the role of indigenous grasses as reservoirs of virus and vectors, and on incidence and severity of MSV in relation to maize varietal susceptibility/resistance levels. Cicadulina populations peak before rains end in the savanna and after the rains in the forest zone. The proportion of viruliferous leafhoppers increases as the season progresses. C. mbila is the predominant vector species; four other species are less common. Off-season survival of MSV and vectors occurs in riverine areas in grasses and in areas with hydromorphic soils where maize is grown during the dry season. However, streak found in many grasses in Nigeria is not readily transmissible to susceptible field maize. Weeds most likely to perpetuate an epidemiologically-competent MSV maize strain are Axonopus compressus (an introduced perennial), Brachiaria lata and Setaria barbata (indigenous annuals). MSV epidemics occur only in ye...

  • Electrical penetration graphs from Cicadulina spp. and the inoculation of a persistent virus into maize
    Entomologia Experimentalis et Applicata, 1996
    Co-Authors: F. M. Kimmins, Nilsa A. Bosque-pérez
    Abstract:

    Maize streak virus (MSV) disease is a sporadic but severe disease of maize in sub-Saharan Africa and is caused by a geminivirus which is persistently transmitted by Cicadulina leafhoppers (Homoptera: Cicadellidae) in a circulative manner (Efron et al., 1989). The Natural Resources Institute (NRI) has undertaken a major project to obtain information about the epidemiology of the disease, particularly the biology of the vectors and their interactions with the virus and host plants in order to develop strategies to control MSV disease. The feeding study of C. storeyi on an improved maize hybrid was undertaken with the International Institute of Tropical Agriculture (UTA) in order to identify vector resistance and to assess its effect on MSV transmission.

  • Movement of Cicadulina storeyi (homoptera: cicadellidae) in maize fields and its behaviour in relation to maize growth stage
    Insect Science and Its Application, 1995
    Co-Authors: C. M. Asanzi, Nilsa A. Bosque-pérez, L. R. Nault
    Abstract:

    The movement of Cicadulina storeyi China (Homoptera: Cicadellidae), vector of maize streak geminivirus, within maize (Zea mays L.) fields was studied using mark, release and recapture experiments. Cicadulina storeyi, marked with fluorescent dye, were released at dusk and monitored for 14 days using yellow sticky traps placed at different distances (5–160 m) and directions from the release point. The suitability of maize growth stage for settling by C. storeyi was also investigated. Catches decreased steadily with distance from the release point and exponentially with time following the release. The mean leafhopper dispersal rate varied between 2.6 and 2.8 m/day for dry season and rainy season tests, respectively. The dispersal rate increased with distance from 1.4 m/day at 5 m to 13.6 m/day at 160 m. Wind was a major factor affecting direction of leafhopper movement with the largest proportion of C. storeyi collected downwind. Investigations on the suitability of maize growth stage for settling by C. storeyi revealed that the leafhopper preferred young plants (2–6 weeks after planting) to old ones.

  • Interactions among maize streak virus disease, leafhopper vector populations and maize cultivars in forest and savanna zones of Nigeria
    Plant Pathology, 1994
    Co-Authors: C. M. Asanzi, Nilsa A. Bosque-pérez, I. W. Buddenhagen, D. T. Gordon, Lowell R. Nault
    Abstract:

    Monthly plantings of three maize cultivars with differing resistance/susceptibility to maize streak geminivirus (MSV) and samplings of Cicadulina leafhopper vectors were made from December 1988 to April 1990 in the humid forest and from May to November 1989 in the Guinea savanna zones of Nigeria. High MSV disease incidences (43–56%) were recorded on susceptible cultivar TZB-Gusau in late-season (July-October) plantings. Hybrid 8321-21 showed significantly lower MSV disease incidence and severity than the other two cultivars, TZB-Gusau and 8329-15. Cicadulina species population peaks (5.2-13.5 leafhoppers/m2) were observed before the rains ended in savanna locations and after the end of the rains in the forest zone. Cicadulina mbila was the predominant species, whereas C. storeyi (syn. C. triangula), C. arachidis, C. similis and C. ghaurii were less common. The proportion of viruliferous leafhoppers increased as the season progressed, reaching maxima of 15–25% at the end of the growing season. Interactions between disease incidence, Cicadulina populations, maize cultivars and rainfall are discussed.

Peter G. Markham - One of the best experts on this subject based on the ideXlab platform.

  • A streak disease of pearl millet caused by a leafhopper-transmitted geminivirus
    European Journal of Plant Pathology, 1996
    Co-Authors: Rob W Briddon, Theo Mesfin, Ian D. Bedford, Leony C. L. Chamberlin, Patricia Lunness, Peter G. Markham
    Abstract:

    The cause of a streak disease of pearl millet ( Pennisetum glaucum ), originating from Nigeria, has been attributed to a geminivirus belonging to the ‘African streak virus’ cluster. A full-length, infectious clone of the virus was obtained which was transmissible by the vector Cicadulina mbila (Naudé). Analysis of the complete nucleotide sequence of the coat protein gene of this virus shows it to be most closely related to sugarcane streak virus. The possible evolutionary implications of this finding are discussed.

  • Feeding activities of Cicadulina mbila (Hemiptera: Cicadellidae) on different host-plants
    Bulletin of Entomological Research, 1995
    Co-Authors: Theo Mesfin, J. Den Hollander, Peter G. Markham
    Abstract:

    AbstractThe probing activities of the most important leafhopper vector of maize streak virus, Cicadulina mbila (Naudé) (Hemiptera: Cicadellidae) were studied on different host-plants. Host preference was determined by giving the insects a choice of six plants, Digitaria sanguinalis, Zea mays, Zea perennis, Paspalum conjugatum, Oryza sativa and Saccharum officinarum (all Gramineae). Cicadulina mbila showed a strong preference for D. sanguinalis. Histological examination of plant tissues for salivary sheaths was used to reveal the preferred tissue. Cicadulina mbila tended to ingest from the phloem of its preferred hosts, and switch to mesophyll or xylem tissue on less preferred hosts. The suitability of each host was assessed by measuring the weight gain and amount of honeydew produced on each host by newly emerged adult females. Both parameters were greatest on the preferred host. Probing behaviour was also monitored electronically by recording the different waveform patterns produced when insects were probing, ingesting or not probing on the selected hosts. Cicadulina mbila probed less frequently, ingested longer and spent less time in non-probing activities on its preferred host, D. sanguinalis, although these responses were similar on maize and sugarcane. Rice induced poor probing responses and altered behaviour. This interpretation of the waveforms was supported by histological examination. As maize streak virus (MSV) is not found in phloem sieve elements, prolonged ingestion from sieve cells would not account for efficient acquisition from maize, which would require ingestion from other types of cells. D. sanguinalis was the host in which most ingestion from the phloem occurred, but it is the poorest source of MSV.

  • The nucleotide sequence of an infectious insect-transmissible clone of the geminivirus Panicum streak virus.
    Journal of General Virology, 1992
    Co-Authors: Rob W Briddon, Leony C. L. Chamberlin, H. Brundish, Patricia Lunness, Marion S. Pinner, Peter G. Markham
    Abstract:

    The infectious genome of a Kenyan isolate of Panicum streak virus (PSV) has been cloned and sequenced. Infection of host plants was done using an Agrobacterium binary vector containing a partial repeat of the genome. Progeny virus from resultant infections proved to be transmissible by the leafhopper Cicadulina mbila (Naude). Comparisons of the amino acid sequences of PSV DNA-encoded proteins with those of previously characterized geminiviruses infecting monocotyledonous plants, including maize streak virus, revealed high levels of identity. The evolutionary relationship between PSV and other geminiviruses infecting monocotyledons is discussed.

Bosque Pérez N.a. - One of the best experts on this subject based on the ideXlab platform.

  • Movement of Cicadulina storeyi [Homoptera:Cicadellidae] in maize fields and its behavior in relation to maize growth stage
    1997
    Co-Authors: Asanzi M., Bosque Pérez N.a., Nault L.r.
    Abstract:

    The movement of Cicadulina storeyi China (Homoptera: Cicadellidae), vector of maize streak geminivirus, within maize (Zea mays L.) fields was studied using mark, release and recapture experiments. Cicadulina storeyi, marked with fluorescent dye, were released at dusk and monitored for 14 days using yellow sticky traps placed at different distances (5–160 m) and directions from the release point. The suitability of maize growth stage for settling by C. storeyi was also investigated. Catches decreased steadily with distance from the release point and exponentially with time following the release. The mean leafhopper dispersal rate varied between 2.6 and 2.8 m/day for dry season and rainy season tests, respectively. The dispersal rate increased with distance from 1.4 m/day at 5 m to 13.6 m/day at 160 m. Wind was a major factor affecting direction of leafhopper movement with the largest proportion of C. storeyi collected downwind. Investigations on the suitability of maize growth stage for settling by C. storeyi revealed that the leafhopper preferred young plants (2–6 weeks after planting) to old onesPeer Revie

  • Biology of Cicadulina species (Homoptera: Cicadellidae) and transmission of maize streak virus
    1995
    Co-Authors: Asanzi M.c., Bosque Pérez N.a., Nault L.r., Gordon D.t., Thottappilly G.
    Abstract:

    The survivorship, fecundity and development time (egg to adult) of Cicadulina storeyi China, C. arachidis China and C. ghaurii Dabrowski were studied at three constant temperatures (20, 25 and 30 .C). Additional tests were conducted to descriptionbe maize streak virus (MSV) transmission by C. arachidis and C. ghaurii and to compare virus transmission efficiency of these two species with that of C. storeyi and C. mbila (Naude).Peer Revie

  • Interactions among maize steak virus disease leathopper vector populations and maize cultivars in forest and savanna zones of Nigeria
    1994
    Co-Authors: Asanzi M., Bosque Pérez N.a., Buddenhagen I.w., Gordon D., Nault L.
    Abstract:

    Monthly plantings of three maize cultivars with differing resistance/susceptibility to maize streak geminivirus (MSV) and samplings of Cicadulina leafhopper vector were made from December 1988 to April 1990 in the humid forest and from May to November 1989 in the Guinea savanna zones of Nigeria. High MSV disease incidences (43-56%) were recorded on susceptible cultivar TZB-Gusau in late season (July-October) plantings. Hybrid 8321-21 showed significantly lower MSV disease incidence and severity than the other two cultivars, TZB-Gusau and 8329-15. Cicadulina species population peaks (5.2-13.5 leafhoppers/m2) were observed before the rains ended in savanna locations and after the end of the rains in the forest zone. Cicadulina mbila was the predominant species, whereas C.storeyi (syn. C. trangula), C. arachidis, C. similis and C. ghaurii were less common. The proportion of viruliferous leafhoppers increased as the season progressed, reaching maxima of 15-25% at the endof the growing season. Interactions between disease incidence, Cicadulina populations, maize cultivars and rainfall are discussed.Peer Revie

  • Les cicadelles et le virus de la striure du mais (MSV): Guide de recherche de lIita, No. 38
    1993
    Co-Authors: Mesfin T., Bosque Pérez N.a.
    Abstract:

    Apres Ie groupe des pu ce rons , c'est Ie groupe des cicadelles qui cornporte Ie plus grand n ornbr e de vecteurs de virus. Les especes de Cicadulina se rencon• trent da ns les regions tropicales et chaudes du rnonde; elles sont, pour la plupart, d'origine africaine. Le virus de la Stl iure du rnals (MSY), t ra n s rnis par Cica• dulina, est une irnportante con t rainte il la production de rna ls en Afrique. II est facile de cornbattre la striure en pl antant des varietes resistantes il cette virose. L'ecolo • gie et I'epicierniologie du MSY sont etroiternent liees il la biologie et il la dyna rnique des populations de cica dulina

Issoufou O. - One of the best experts on this subject based on the ideXlab platform.

  • Influence de la Succession des Générations de Cicadulina Mbila Naudé dans les Conditions Artificielles D'Élevage sur L'Dfficacité de Transmission du Virus de la Striure du Maïs au Burkina Faso
    African Crop Science Society, 2009
    Co-Authors: Seydou T.n., Rémy D.a., Dona D., Kaditiatou Z., Issoufou O.
    Abstract:

    The study of the influence of the succession of four generations of Cicadulina Mbila Naude (Homoptera: Cicadellidae) on Maize Streak Virus (MSV) transmission in Burkina Faso showed that over successive generations, the insect vector loses its virus transmission efficiency by ± 26%, and the disease incubation period increases by 3.11 days. Females are more efficient in transmissing the virus (73.33%), than the males (57.21%). The disease transmission period is 5.83 days for the females compared to 6.16 days for the males. Finally, this study showed that the transmission rate obtained over four generations of mass reared C. mbila is always higher than the recommended rate of 35% for maize breeding and therefore, can be used in breeding for MSV virus resistance.L'étude de l'influence de la succession de quatre générations d'une population de Cicadulina Mbila Naude (Homoptera: Cicadellidae) sur la transmission du Maize Streak Virus (MSV) réalise au Burkina Faso a montre qu'au cours des générations successives, l'insecte vecteur voit son efficacité de transmission du virus diminuée de + 26% tandis que la période d'incubation de la maladie augmente de 3,11 jours. Les femelles de la quatrième génération sont plus aptes a transmettre efficacement le virus (73,33%) que les males (57,21%). La période d'incubation de la maladie est de 5,83 jours pour les femelles contre 6,16 jours pour les males. Cette étude a montre que le taux de transmission du virus obtenu avec les quatre générations de C. mbila, issues de l'élevage artificiel, et est toujours supérieur au taux de 35% recommandé par l'IITA et peut donc être accepté par les tests de sélection du maïs pour la résistance au virus du MSV

Ouedraogo Issoufou - One of the best experts on this subject based on the ideXlab platform.

  • influence de la succession des generations de Cicadulina mbila naude dans les conditions artificielles d elevage sur l efficacite de transmission du virus de la striure du mais au burkina faso
    African Crop Science Journal, 2005
    Co-Authors: Traore Nafoni Seydou, Dabire Anogmain Remy, Dakouo Dona, Zida Kaditiatou, Ouedraogo Issoufou
    Abstract:

    L\'etude de l\'influence de la succession de quatre generations d\'une population de Cicadulina mbila Naude ( Homoptera: Cicadellidae ) sur la transmission du Maize Streak Virus (MSV) realise au Burkina Faso a montre qu\'au cours des generations successives, l\'insecte vecteur voit son efficacite de transmission du virus diminuee de + 26% tandis que la periode d\'incubation de la maladie augmente de 3,11 jours. Les femelles de la quatrieme generation sont plus aptes a transmettre efficacement le virus (73,33%) que les males (57,21%). La periode d\'incubation de la maladie est de 5,83 jours pour les femelles contre 6,16 jours pour les males. Cette etude a montre que le taux de transmission du virus obtenu avec les quatre generations de C. mbila , issues de l\'elevage artificiel, et est toujours superieur au taux de 35% recommande par l\'IITA et peut donc etre accepte par les tests de selection du mais pour la resistance au virus du MSV. Mots cles : Cicadelles, elevage artificiel, mais, generations, virus ABSTRACT The study of the influence of the succession of four generations of Cicadulina mbila Naude ( Homoptera: Cicadellidae ) on Maize Streak Virus (MSV) transmission in Burkina Faso showed that over successive generations, the insect vector loses its virus transmission efficiency by ± 26%, and the disease incubation period increases by 3.11 days. Females are more efficient in transmissing the virus (73.33%), than the males (57.21%). The disease transmission period is 5.83 days for the females compared to 6.16 days for the males. Finally, this study showed that the transmission rate obtained over four generations of mass reared C. mbila is always higher than the recommended rate of 35% for maize breeding and therefore, can be used in breeding for MSV virus resistance. Key Words: Cicadella, mass rearing, maize, generations, virus African Crop Science Journal Vol.12(4) 2004: 343-349