Efficiency of neem oil nanoformulations to Bemisia tabaci (GENN.) Biotype B (Hemiptera: Aleyrodidae)

Autores

  • Sheila Salles Carvalho Universidade de São Paulo/Escola Superior de Agricultura Luiz de Queiroz
  • José Djair Vendramim Universidade de São Paulo/Escola Superior de Agricultura Luiz de Queiroz
  • Rafael Major Pitta Embrapa Agrossilvipastoril
  • Moacir Rossi Forim Universidade de São Carlos/Centro de Ciências Exatas e de Tecnologia

DOI:

https://doi.org/10.5433/1679-0359.2012v33n1p193

Palavras-chave:

Whitefly, Botanical pesticide, Nanotechnology, B-ciclodextrin, Poli-e-caprolactone.

Resumo

The nanotechnology, through encapsulation of active ingredients, has showed an important way to avoid problems with quickly degradation of the pesticide molecules. Thus, neem (Azadirachta indica) oil nanoformulations containing ?-ciclodextrin and poli-?-caprolactone (PCL) were tested as to their control efficiency against eggs and nymphs of Bemisia tabaci (Genn.) biotype B reared in soybean. The Lethal Concentration (LC50) was estimated using a commercial neem oil (Organic Neem®) on first-instar nymphs to establish the adequate volume of the nanoformulations per treatment. After that, they were sprayed on eggs and first-instar nymphs in laboratory and greenhouse and on third-instar nymphs in greenhouse. The commercial neem oil and distilled water were used as controls. Egg viability was not affected by any treatment. Among six nanoformulations, only one was efficient against the first-instar nymphs in laboratory conditions. However, its effective period was not increased as expected. In greenhouse, first-instar nymphs were more affected by two nanoformulations which were significantly different of the commercial neem oil - the most effective one. No mortality differences among the formulations in the third-instar test were observed. The nanoformulations were less efficient to control the B. tabaci biotype B nymphs than the commercial neem oil.

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Biografia do Autor

Sheila Salles Carvalho, Universidade de São Paulo/Escola Superior de Agricultura Luiz de Queiroz

Biologist, Master´s degree student in Entomology, Deptº de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”/Universidade de São Paulo, Av. Pádua Dias, 11, Piracicaba, SP, 13418-900, Brazil.

 

José Djair Vendramim, Universidade de São Paulo/Escola Superior de Agricultura Luiz de Queiroz

Agronomist, Full Prof. Deptº de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”/Universidade de São Paulo, Piracicaba, SP, Brazil.

Rafael Major Pitta, Embrapa Agrossilvipastoril

Agronomist, Researcher, Embrapa Agrossilvipastoril, Sinop-MT, Brazil.

Moacir Rossi Forim, Universidade de São Carlos/Centro de Ciências Exatas e de Tecnologia

Chemist, PhD Prof. Deptº de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil.

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Publicado

2012-04-05

Como Citar

Carvalho, S. S., Vendramim, J. D., Pitta, R. M., & Forim, M. R. (2012). Efficiency of neem oil nanoformulations to Bemisia tabaci (GENN.) Biotype B (Hemiptera: Aleyrodidae). Semina: Ciências Agrárias, 33(1), 193–202. https://doi.org/10.5433/1679-0359.2012v33n1p193

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