| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Epagri-Sede. |
|
Data corrente: |
18/10/2022 |
|
Data da última atualização: |
18/10/2022 |
|
Tipo da produção científica: |
Resumo em Anais de Congresso |
|
Autoria: |
SILVA, M. C. C. R.; CASTILHOS, R. V.; NESI, C. N.; SILVA, L. R. S.; BENTO, J. M. S. |
|
Título: |
Dalbulus maidis, the insect vector of Maize rayado fino virus (MRFV), does not distinguish between two maize genotypes in field conditions but seems to prefer asymptomatic plants. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
In: WORKSHOP BRASILEIRO DE EPIDEMIOLOGIA DE DOENÇAS DE PLANTAS, 6., 2022, Chapecó. Resumos... Brasília: Sociedade Brasileira de Fitopatologia, 2022. p. 43 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) is the vector for the Maize rayado fino virus (MRFV), and recent studies have demonstrated its ability to discriminate different maize genotypes (Virla et al. 2010; Faria et al. 2021). When a persistently transmitted virus is involved in a plant-insect interaction, a series of modifications can also occur that aids transmission and dissemination process, involving changes in the insect vector's behavior (Mauck et al. 2012). This study aimed to verify the presence of D. maidis on MRFV-symptomatic and non-symptomatic plants of P4285 hybrid (resistant to order Lepidoptera) and SCS156 Colorado (an open pollination variety) in a field experiment. The incidence of MRFV diseased plants and plant production was also recorded in both genotypes. A field study was carried out in the second season after maize genotypes were sown at Epagri experimental field in Chapecó (Santa Catarina, Brazil) in January 2021. The experiment was set with 6 parcels for each genotype, with 6 rows of 5 m and spaced 0.8 m. Plants in the rows were spaced with 0.2 m. Corn leafhoppers were visually counted in the maize whorl at 9, 12, 14 and 16 days after sown (d.a.s.). When it was no longer possible to count the insects directly from the plant, yellow sticky traps were installed in the center of the plot at 1 m high on the 23rd d.a.s. The traps were replaced weekly, for three consecutive weeks. The number of D. maidis in the plant whorl or captured in the traps was not statistically different for P4285 hybrid or SCS156 Colorado. Maize plants were displaying symptoms of MRFV at 14 d.a.s. We evaluated the incidence of MRFV-symptomatic plants by observing 10 plants in the center of the plot. There were more MRFV diseased plants in P4285 than in Colorado (x̅ = 2.50 and 0.16, respectively, P-value = 0.001). We counted the number of D. maidis in 10 MRFV-diseased plants in each plot, and there was more leafhoppers in asymptomatic plants than in symptomatic, disregarding the genotype (x̅ = 7.3 and 5.4, respectively, P-value = 0.008). Plants (~12 each plot) with and without MRFV symptoms were tagged during experiment conduction, and their cobs were harvested during physiological maturation in order to check plant production. The production of each maize genotype was affected by MRFV disease, as SCS156 Colorado produced 42% less if MRFV symptomatic plants, while P4285 produced 45% less in comparison with asymptomatic plants. In conclusion, D. maidis seems not to distinguish between P4285 and SCS156 Colorado in field conditions. However, a higher incidence of MRFV in the hybrid was observed in the early days of the crop, which may be due to a shorter incubation period of the virus in planta. Insects were more numerous in asymptomatic plants of either genotype, suggesting either a preference for symptomless plants or a manipulation of the virus for spreading. In the end, MRFV affected the productivity of both maize genotypes. MenosThe corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) is the vector for the Maize rayado fino virus (MRFV), and recent studies have demonstrated its ability to discriminate different maize genotypes (Virla et al. 2010; Faria et al. 2021). When a persistently transmitted virus is involved in a plant-insect interaction, a series of modifications can also occur that aids transmission and dissemination process, involving changes in the insect vector's behavior (Mauck et al. 2012). This study aimed to verify the presence of D. maidis on MRFV-symptomatic and non-symptomatic plants of P4285 hybrid (resistant to order Lepidoptera) and SCS156 Colorado (an open pollination variety) in a field experiment. The incidence of MRFV diseased plants and plant production was also recorded in both genotypes. A field study was carried out in the second season after maize genotypes were sown at Epagri experimental field in Chapecó (Santa Catarina, Brazil) in January 2021. The experiment was set with 6 parcels for each genotype, with 6 rows of 5 m and spaced 0.8 m. Plants in the rows were spaced with 0.2 m. Corn leafhoppers were visually counted in the maize whorl at 9, 12, 14 and 16 days after sown (d.a.s.). When it was no longer possible to count the insects directly from the plant, yellow sticky traps were installed in the center of the plot at 1 m high on the 23rd d.a.s. The traps were replaced weekly, for three consecutive weeks. The number of D. maidis in the plant... Mostrar Tudo |
|
Thesagro: |
corn stunt disease complex; epidemiology; insect transmissiom; plant virus. |
|
Categoria do assunto: |
O Insetos e Entomologia |
|
|
|
|
Marc: |
LEADER 03872naa a2200217 a 4500
001 1132625
005 2022-10-18
008 2022 bl uuuu u00u1 u #d
100 1 $aSILVA, M. C. C. R.
245 $aDalbulus maidis, the insect vector of Maize rayado fino virus (MRFV), does not distinguish between two maize genotypes in field conditions but seems to prefer asymptomatic plants.$h[electronic resource]
260 $c2022
520 $aThe corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) is the vector for the Maize rayado fino virus (MRFV), and recent studies have demonstrated its ability to discriminate different maize genotypes (Virla et al. 2010; Faria et al. 2021). When a persistently transmitted virus is involved in a plant-insect interaction, a series of modifications can also occur that aids transmission and dissemination process, involving changes in the insect vector's behavior (Mauck et al. 2012). This study aimed to verify the presence of D. maidis on MRFV-symptomatic and non-symptomatic plants of P4285 hybrid (resistant to order Lepidoptera) and SCS156 Colorado (an open pollination variety) in a field experiment. The incidence of MRFV diseased plants and plant production was also recorded in both genotypes. A field study was carried out in the second season after maize genotypes were sown at Epagri experimental field in Chapecó (Santa Catarina, Brazil) in January 2021. The experiment was set with 6 parcels for each genotype, with 6 rows of 5 m and spaced 0.8 m. Plants in the rows were spaced with 0.2 m. Corn leafhoppers were visually counted in the maize whorl at 9, 12, 14 and 16 days after sown (d.a.s.). When it was no longer possible to count the insects directly from the plant, yellow sticky traps were installed in the center of the plot at 1 m high on the 23rd d.a.s. The traps were replaced weekly, for three consecutive weeks. The number of D. maidis in the plant whorl or captured in the traps was not statistically different for P4285 hybrid or SCS156 Colorado. Maize plants were displaying symptoms of MRFV at 14 d.a.s. We evaluated the incidence of MRFV-symptomatic plants by observing 10 plants in the center of the plot. There were more MRFV diseased plants in P4285 than in Colorado (x̅ = 2.50 and 0.16, respectively, P-value = 0.001). We counted the number of D. maidis in 10 MRFV-diseased plants in each plot, and there was more leafhoppers in asymptomatic plants than in symptomatic, disregarding the genotype (x̅ = 7.3 and 5.4, respectively, P-value = 0.008). Plants (~12 each plot) with and without MRFV symptoms were tagged during experiment conduction, and their cobs were harvested during physiological maturation in order to check plant production. The production of each maize genotype was affected by MRFV disease, as SCS156 Colorado produced 42% less if MRFV symptomatic plants, while P4285 produced 45% less in comparison with asymptomatic plants. In conclusion, D. maidis seems not to distinguish between P4285 and SCS156 Colorado in field conditions. However, a higher incidence of MRFV in the hybrid was observed in the early days of the crop, which may be due to a shorter incubation period of the virus in planta. Insects were more numerous in asymptomatic plants of either genotype, suggesting either a preference for symptomless plants or a manipulation of the virus for spreading. In the end, MRFV affected the productivity of both maize genotypes.
650 $acorn stunt disease complex
650 $aepidemiology
650 $ainsect transmissiom
650 $aplant virus
700 1 $aCASTILHOS, R. V.
700 1 $aNESI, C. N.
700 1 $aSILVA, L. R. S.
700 1 $aBENTO, J. M. S.
773 $tIn: WORKSHOP BRASILEIRO DE EPIDEMIOLOGIA DE DOENÇAS DE PLANTAS, 6., 2022, Chapecó. Resumos... Brasília: Sociedade Brasileira de Fitopatologia, 2022. p. 43
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Epagri-Sede (Epagri-Sede) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
|
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Epagri-Sede. Para informações adicionais entre em contato com biblio@epagri.sc.gov.br. |
Registro Completo
|
Biblioteca(s): |
Epagri-Sede. |
|
Data corrente: |
14/02/2005 |
|
Data da última atualização: |
14/02/2005 |
|
Autoria: |
BONETI, J.I.da S.; PEREIRA, A.J.; BRIGHENTI, E.; KATSURAYAMA, Y.; TSUCHIYA, S. |
|
Afiliação: |
Epagri |
|
Título: |
Situacao atual e perspectiva de obtencao de cultivares e porta-enxertos de macieira resistentes as doencas, para a regiao subtropical. |
|
Ano de publicação: |
2001 |
|
Fonte/Imprenta: |
SEMINARIO SOBRE FRUTICULTURA DE CLIMA TEMPERADO, 1., 2001, Florianopolis, SC. Anais... Florianopolis: Epagri, 2001. |
|
Páginas: |
p.39-52. |
|
Idioma: |
Português |
|
Conteúdo: |
The apple industry in Brazil began in the end of the decade of 1960, when the country passed the totally importer of apples for the exporter. For these years the apple growers were changing the varieties and rootstocks with objetive of to increase the productive efficiency and to satisfy the consumer, more and more demanding. Nowadays, gala and fuji are the varieties more plnted, and Marubakaido, Marubakaido/M.9, M.7, MM.106, M.9 and M.26 are the most used rootstocks. In spite of well accept for the consumers, these varieties are very susceptible to many diseases. The rootstocks can be susceptible to root diseases, viroses, pests, emission of burrknots, besides vigor excess, in some cases and lack of adaptation to the climate and soil of the south of Brazil. So, the control of the diseases and pests are made through the application of fungicides and insecticides. Theses products, if not well-handled can intoxicate the man, contaminate the environment and increases significanthy the cost of production. The use of naturally resistant varieties and rootstocks is a very important factor for the establishment of the integrated pest management, inside of a concept of integrated production of apples or an organic production. In this sense, Epagri through the Sao Joaquim and Cacador Experimental Stations are developing an Apple Breeding Project, initiate in the decade of 1970, with objetive of obtaining new improved varieties on rootstocks, productive, well adapted to the climate conditions and soil of the south of Brazil, and resistant to the main pests and diseases. Until the present moment the following apple scab resistant varieties were already released: Primicia, Fred Hough, Catarina and Duquesa. These varieties are being still evaluated for the apple growers and some commercial plantings are already being made with the Catarina. On the other hand, the Gala Leaf Spot (GLS), that is a typically Brazilian disease and not very well known, caused by Colletotrichum spp., it is becoming more and more important due to severity with that shows in hot and rainy yers. This way, besides the Scab, it is also necessary to create new varieties with the Gala quality and that are resistant to GLS. The rootstocks are also fundamental for the success of the apple cultivation. Now there in tendency of high density planting with use of dwarfing and semi-dwarfing rootstock. As most of the orchards of Sao Joaquim's area is cultivated with the Marubakaido rootstock that is resistant to the Collar Rot, but extemely vigorous, and the other areas with M.7, moderately resistant the this disease and susceptible to Woolly Aphids, is necessary to search new adapted materials to the conditions of the south of Brazil, that are resistant the main diseases and pests of the soil. In this papers is present the results obtained in the Epagri Apple Breeding Project in the last years aiming at the obtaining of new apple variaties and rootstocks. MenosThe apple industry in Brazil began in the end of the decade of 1960, when the country passed the totally importer of apples for the exporter. For these years the apple growers were changing the varieties and rootstocks with objetive of to increase the productive efficiency and to satisfy the consumer, more and more demanding. Nowadays, gala and fuji are the varieties more plnted, and Marubakaido, Marubakaido/M.9, M.7, MM.106, M.9 and M.26 are the most used rootstocks. In spite of well accept for the consumers, these varieties are very susceptible to many diseases. The rootstocks can be susceptible to root diseases, viroses, pests, emission of burrknots, besides vigor excess, in some cases and lack of adaptation to the climate and soil of the south of Brazil. So, the control of the diseases and pests are made through the application of fungicides and insecticides. Theses products, if not well-handled can intoxicate the man, contaminate the environment and increases significanthy the cost of production. The use of naturally resistant varieties and rootstocks is a very important factor for the establishment of the integrated pest management, inside of a concept of integrated production of apples or an organic production. In this sense, Epagri through the Sao Joaquim and Cacador Experimental Stations are developing an Apple Breeding Project, initiate in the decade of 1970, with objetive of obtaining new improved varieties on rootstocks, productive, well adapted to the climate co... Mostrar Tudo |
|
Palavras-Chave: |
Doenca; Maca; Malus domestica; Melhoramento genetico vegetal; Variedade resistente. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 03741naa a2200241 a 4500
001 1034037
005 2005-02-14
008 2001 bl uuuu u00u1 u #d
100 1 $aBONETI, J.I.da S.
245 $aSituacao atual e perspectiva de obtencao de cultivares e porta-enxertos de macieira resistentes as doencas, para a regiao subtropical.
260 $c2001
300 $ap.39-52.
520 $aThe apple industry in Brazil began in the end of the decade of 1960, when the country passed the totally importer of apples for the exporter. For these years the apple growers were changing the varieties and rootstocks with objetive of to increase the productive efficiency and to satisfy the consumer, more and more demanding. Nowadays, gala and fuji are the varieties more plnted, and Marubakaido, Marubakaido/M.9, M.7, MM.106, M.9 and M.26 are the most used rootstocks. In spite of well accept for the consumers, these varieties are very susceptible to many diseases. The rootstocks can be susceptible to root diseases, viroses, pests, emission of burrknots, besides vigor excess, in some cases and lack of adaptation to the climate and soil of the south of Brazil. So, the control of the diseases and pests are made through the application of fungicides and insecticides. Theses products, if not well-handled can intoxicate the man, contaminate the environment and increases significanthy the cost of production. The use of naturally resistant varieties and rootstocks is a very important factor for the establishment of the integrated pest management, inside of a concept of integrated production of apples or an organic production. In this sense, Epagri through the Sao Joaquim and Cacador Experimental Stations are developing an Apple Breeding Project, initiate in the decade of 1970, with objetive of obtaining new improved varieties on rootstocks, productive, well adapted to the climate conditions and soil of the south of Brazil, and resistant to the main pests and diseases. Until the present moment the following apple scab resistant varieties were already released: Primicia, Fred Hough, Catarina and Duquesa. These varieties are being still evaluated for the apple growers and some commercial plantings are already being made with the Catarina. On the other hand, the Gala Leaf Spot (GLS), that is a typically Brazilian disease and not very well known, caused by Colletotrichum spp., it is becoming more and more important due to severity with that shows in hot and rainy yers. This way, besides the Scab, it is also necessary to create new varieties with the Gala quality and that are resistant to GLS. The rootstocks are also fundamental for the success of the apple cultivation. Now there in tendency of high density planting with use of dwarfing and semi-dwarfing rootstock. As most of the orchards of Sao Joaquim's area is cultivated with the Marubakaido rootstock that is resistant to the Collar Rot, but extemely vigorous, and the other areas with M.7, moderately resistant the this disease and susceptible to Woolly Aphids, is necessary to search new adapted materials to the conditions of the south of Brazil, that are resistant the main diseases and pests of the soil. In this papers is present the results obtained in the Epagri Apple Breeding Project in the last years aiming at the obtaining of new apple variaties and rootstocks.
653 $aDoenca
653 $aMaca
653 $aMalus domestica
653 $aMelhoramento genetico vegetal
653 $aVariedade resistente
700 1 $aPEREIRA, A.J.
700 1 $aBRIGHENTI, E.
700 1 $aKATSURAYAMA, Y.
700 1 $aTSUCHIYA, S.
773 $tSEMINARIO SOBRE FRUTICULTURA DE CLIMA TEMPERADO, 1., 2001, Florianopolis, SC. Anais... Florianopolis: Epagri, 2001.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Epagri-Sede (Epagri-Sede) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
