Ocorrência de begomovírus de plantas de pimentão no Estado de São Paulo e comportamento de genótipos de Capsicum spp. ao tomato severe rugose virus e a Bemisia tabaci meam1
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Data
2014-02-25
Autores
Pantoja, Késsia de Fátima da Cunha [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
A mosca branca Bemisia tabaci MEAM1, (Hem: Aleyrodidae) é considerada uma das pragas mais ameaçadoras em todo o mundo, principalmente por sua capacidade de transmitir vírus, em especial os begomovírus. Diante da importância desse vírus e de seu vetor, o presente trabalho avaliou a ocorrência de begomovírus em áreas de produção de pimentão. Do total de 83 amostras de pimentão analisadas somente 13 (15,66%) foram positivas para begomovírus, sendo encontradas as espécies já relatadas para o estado de São Paulo: Tomato severe rugose virus (ToSRV) e Tomato yellow vein streak virus (ToYVSV). Verificou-se também a presença de Cucumber mosaic virus (CMV) e tospovírus nas plantas analisadas. O trabalho também teve como objetivo avaliar a resposta de 36 genótipos de Capsicum à infecção pelo ToSRV, à atratividade e à preferência para oviposição por moscas brancas em testes de livre escolha. Após esta análise preliminar, foram selecionados os genótipos C. annuum (IAC-1551; IAC-1566; IAC-1579), C. chinense (IAC-1545; IAC-1549) e C. frutescens (IAC-1544) (assintomático ao vírus e não atrativo ao vetor) e C. baccatum (IAC-1357) (sintomático ao ToSRV e atrativo ao vetor), para as etapas subsequentes. Os genótipos IAC-1566, IAC-1544 e IAC-1357 também foram avaliados quanto à dispersão primária e secundária do ToSRV pela mosca-branca. C. annuum (IAC-1551; IAC-1566; IAC-1579), C. chinense (IAC-1545; IAC-1549) e C. frutescens (IAC-1544) mostraram-se assintomáticos ao isolado de ToSRV avaliado durante 80 dias após inoculação e as médias de oviposição e atratividade variaram de 0,33 a 2,66 ovos/genótipo e 0,25 a 3,50 adultos/genótipo respectivamente, em teste com chance de escolha. No teste sem chance de escolha foi observada baixa atratividade e oviposição de adultos de mosca-branca nos genótipos IAC-1544; IAC-1551; 2 IAC-1579; IAC-1545 e IAC-1549 que diferiram...
The Whitefly Bemisia tabaci MEAM1 (Hem: Aleyrodidade) is considered one of the most threatening pests worldwide, mainly because of its ability to transmit viruses, especially begomoviruses. Given the importance of this virus and its vector, the present study evaluated the of occurrence of begomoviruses in production areas of peppers. Of the total of 83 samples analyzed only 13 (15,66%) were positive for begomovirus, and the two species already reported for state of São Paulo Tomato severe rugose virus (ToSRV) and Tomato yellow vein streak virus (ToYVSV) were detected on the plants. Cucumber mosaic virus (CMV) and tospovirus were also detected on the plants analyzed. We also evaluate 36 genotypes of Capsicum for ToSRV infection, for attractiveness and oviposition preference by whiteflies released in choice experiments. 4 After this preliminary analysis, the genotypes C. annuum (IAC-1551, IAC-1566, IAC-1579), C. chinense (IAC-1545, IAC-1549) and C. frutescens (IAC-1544) (assymptomatic for ToSRV and less attractive for the whitefly) and C. baccatum (IAC-1357) (symptomatic for ToSRV and more attractive for the vector) were selected for the subsequent. The genotypes IAC-1566, IAC-1544 and IAC-1357 were also evaluated for the primary and secondary dispersion of ToSRV by the whiteflies. C. annuum (IAC-1551, IAC-1566, IAC-1579), C. chinense (IAC-1545, IAC-1549) and C. frutescens (IAC-1544) were asymptomatic for ToSRV at 80 days after inoculation and the averages of attractiveness and oviposition ranged from 0.33 to 2.66 eggs / genotype and 0.25 to 3.50 adults / genotype, respectively, with whiteflies released in free choice test. In the no choice test, low attractiveness and oviposition of adult whiteflies were observed for genotypes IAC-1544, IAC-1551, IAC-1579, IAC-1545 and IAC-1549 which were statistically different from IAC -1357. The nymphal development for genotype IAC-1357 was 30.25 ...
The Whitefly Bemisia tabaci MEAM1 (Hem: Aleyrodidade) is considered one of the most threatening pests worldwide, mainly because of its ability to transmit viruses, especially begomoviruses. Given the importance of this virus and its vector, the present study evaluated the of occurrence of begomoviruses in production areas of peppers. Of the total of 83 samples analyzed only 13 (15,66%) were positive for begomovirus, and the two species already reported for state of São Paulo Tomato severe rugose virus (ToSRV) and Tomato yellow vein streak virus (ToYVSV) were detected on the plants. Cucumber mosaic virus (CMV) and tospovirus were also detected on the plants analyzed. We also evaluate 36 genotypes of Capsicum for ToSRV infection, for attractiveness and oviposition preference by whiteflies released in choice experiments. 4 After this preliminary analysis, the genotypes C. annuum (IAC-1551, IAC-1566, IAC-1579), C. chinense (IAC-1545, IAC-1549) and C. frutescens (IAC-1544) (assymptomatic for ToSRV and less attractive for the whitefly) and C. baccatum (IAC-1357) (symptomatic for ToSRV and more attractive for the vector) were selected for the subsequent. The genotypes IAC-1566, IAC-1544 and IAC-1357 were also evaluated for the primary and secondary dispersion of ToSRV by the whiteflies. C. annuum (IAC-1551, IAC-1566, IAC-1579), C. chinense (IAC-1545, IAC-1549) and C. frutescens (IAC-1544) were asymptomatic for ToSRV at 80 days after inoculation and the averages of attractiveness and oviposition ranged from 0.33 to 2.66 eggs / genotype and 0.25 to 3.50 adults / genotype, respectively, with whiteflies released in free choice test. In the no choice test, low attractiveness and oviposition of adult whiteflies were observed for genotypes IAC-1544, IAC-1551, IAC-1579, IAC-1545 and IAC-1549 which were statistically different from IAC -1357. The nymphal development for genotype IAC-1357 was 30.25 ...
Descrição
Palavras-chave
Mosca branca, Pimentão - Doenças e pragas, Virus de plantas, Plantas - Biologia molecular, Bemisia
Como citar
PANTOJA, Késsia de Fátima da Cunha. Ocorrência de begomovírus de plantas de pimentão no Estado de São Paulo e comportamento de genótipos de Capsicum spp. ao tomato severe rugose virus e a Bemisia tabaci meam1. 2014. vii, 62 f. Dissertação (mestrado) - Universidade Estadual Paulista “Julio de Mesquita Filho” , Faculdade de Ciências Agronômicas de Botucatu, 2014.