Effect of bean genotypes, insecticides, and natural products on the control of Bemisia tabaci

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). The influence of bean genotypes associated with neem oil as insecticide was evaluated to control B....

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2011-07, Vol.33 (3), p.445
Main Authors: Janini, Julio Cesar, Boica, Arlindo Leal, Jr, Jesus, Flavio Goncalves, Silva, Anderson Goncalves, Carbonell, Sergio Augusto, Chiorato, Alisson Fernando
Format: Article
Language:Spanish
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Summary: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). 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 4 x 4 x 3 factorial scheme, represented by genotypes, neem oil and insecticides respectively, with three replications. The genotypes Carioca, IAC Harmonia, IAC Centauro and Perola 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. Keywords: Bemisia tabaci biotype B, Caliothrips phaseoli, Phaseoli vulgaris, resistance of plants. Efeito de genotipos de feijoeiro, inseticida e produtos naturais no controle Bemisia tabaci (Gennadius) biotipo B (Hemiptera: Aleyrodidae) e Caliothrips phaseoli (Hood) (Thysanoptera: Thripidae). Avaliou-se a influencia de genotipos de feijoeiro associado a aplicacao de oleo de nim e inseticida no controle de B. tabaci (Gennadius) biotipo B e C. phaseoli (Hood) na epoca de semeadura "das aguas". O delineamento experimental utilizados foi o de blocos casualizados dispostos em um esquema fatorial 4 x 3 x 3, representado por variedades, oleo de nim e inseticidas, respectivamente, com tres repeticoes. Utilizaram-se os genotipos Carioca, IAC Harmonia, IAC Centauro e Perola. As avaliacoes foram realizadas dos 14 aos 42 dias apos a emergencia das plantas, contando-se o numero de ovos e ninfas de B. tabaci biotipo B e ninfas de C. phaseoli nos foliolos dos genotipos. Concluiu-se: o numero de ovos e ninfas de B. tabaci biotipo B foi menor em IAC Centauro e maior em IAC Harmonia. Os genotipos testados foram igualmente infesta
ISSN:1679-9275
1807-8621
DOI:10.4025/actasciagron.v33i3.7577