Effect of bean genotypes, insecticides, and natural products on the control of Bemisia tabaci (Gennadius) biotype B (Hemiptera: Aleyrodidae) and Caliothrips phaseoli (Hood) (Thysanoptera: Thripidae)
Data
2011-09-01
Autores
Janini, Júlio Cesar [UNESP]
Boiça Júnior, Arlindo Leal [UNESP]
Jesus, Flávio Gonçalves [UNESP]
Silva, Anderson Gonçalves [UNESP]
Carbonell, Sérgio Augusto
Chiorato, Alisson Fernando
Título da Revista
ISSN da Revista
Título de Volume
Editor
Editora da Universidade Estadual de Maringá (EDUEM)
Resumo
Avaliou-se a influência de genótipos de feijoeiro associado à aplicação de óleo de nim e inseticida no controle de B. tabaci (Gennadius) biótipo B e C. phaseoli (Hood) na época de semeadura das águas. O delineamento experimental utilizados foi o de blocos casualizados dispostos em um esquema fatorial 4 x 3 x 3, representado por variedades, óleo de nim e inseticidas, respectivamente, com três repetições. Utilizaram-se os genótipos Carioca, IAC Harmonia, IAC Centauro e Pérola. As avaliações foram realizadas dos 14 aos 42 dias após a emergência das plantas, contando-se o número de ovos e ninfas de B. tabaci biótipo B e ninfas de C. phaseoli nos folíolos dos genótipos. Concluiu-se: o número de ovos e ninfas de B. tabaci biótipo B foi menor em IAC Centauro e maior em IAC Harmonia. Os genótipos testados foram igualmente infestados por C. phaseoli. IAC Centauro e IAC Harmonia associado ao óleo de nim e com destaque a dose cheia (1,0%), propiciaram menor número de ovos de mosca branca e de ninfas tripes, e o último deles atuou reduzindo o número de ninfas de mosca branca. Nos genótipos testados o inseticida proporcionou redução no número de ovos e ninfas de mosca branca e de ninfas de tripes, com incremento na dose recomendada.
The influence of bean genotypes associated with neem oil as insecticide was evaluated to control B. tabaci (Gennadius) biotype B and C. phaseoli (Hood) during the wet season sowing. The experimental design used was the randomized block arrangement in a 4x4x3 factorial scheme, represented by genotypes, neem oil and insecticides respectively, with three replications. The genotypes Carioca, IAC Harmonia, IAC Centauro and Pérola were used. The evaluations were done at 14 and 42 days after seedling emergence, by counting B. tabaci biotype B eggs and nymphs and C. phaseoli nymphs in the genotypes leaf. Conclusion: The B. tabaci biotype B eggs and nymphs number were smaller in IAC Centauro and higher in IAC Harmonia. The tested genotypes were similarly infested by C. phaseoli. IAC Centauro and IAC Harmonia genotypes associated with neem oil (highlighting the full dose - 1%) provided lower number of whitefly eggs and thrips nymphs. Neem oil at the full dose also reduced whitefly nymph number. In the tested genotypes the insecticide provided reduction in the number of whitefly eggs and nymphs as well in the thrips nymphs, with increase in the recommend dose.
The influence of bean genotypes associated with neem oil as insecticide was evaluated to control B. tabaci (Gennadius) biotype B and C. phaseoli (Hood) during the wet season sowing. The experimental design used was the randomized block arrangement in a 4x4x3 factorial scheme, represented by genotypes, neem oil and insecticides respectively, with three replications. The genotypes Carioca, IAC Harmonia, IAC Centauro and Pérola were used. The evaluations were done at 14 and 42 days after seedling emergence, by counting B. tabaci biotype B eggs and nymphs and C. phaseoli nymphs in the genotypes leaf. Conclusion: The B. tabaci biotype B eggs and nymphs number were smaller in IAC Centauro and higher in IAC Harmonia. The tested genotypes were similarly infested by C. phaseoli. IAC Centauro and IAC Harmonia genotypes associated with neem oil (highlighting the full dose - 1%) provided lower number of whitefly eggs and thrips nymphs. Neem oil at the full dose also reduced whitefly nymph number. In the tested genotypes the insecticide provided reduction in the number of whitefly eggs and nymphs as well in the thrips nymphs, with increase in the recommend dose.
Descrição
Palavras-chave
Bemisia tabaci biotype B, Caliothrips phaseoli, Phaseoli vulgaris, resistance of plants, Bemisia tabaci biótipo B, Caliothrips phaseoli, Phaseolus vulgaris, Resistência de plantas
Como citar
Acta Scientiarum. Agronomy. Editora da Universidade Estadual de Maringá (UEM) - EDUEM, v. 33, n. 3, p. 445-450, 2011.