SciELO - Scientific Electronic Library Online

 
vol.39 número1Fertilización nitrogenada en el crecimiento, contenido de compuestos fenólicos y actividad antioxidante de albahacaVariabilidad morfológica de Phaseolus lunatus L. Silvestre de la región occidente de México índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista fitotecnia mexicana

versão impressa ISSN 0187-7380

Resumo

FLORES-MACIAS, Antonio et al. Effect of potassium nitrate on the production of ricinine by Ricinus communis and its insecticidal activity against Spodoptera frugiperda. Rev. fitotec. mex [online]. 2016, vol.39, n.1, pp.41-47. ISSN 0187-7380.

The effect of four nitrogen levels (KNO3: 5, 10, 15 and 20 meq L-1) on the production of ricinine was studied using a semi-hydroponic system. The insecticidal activity of methanolic extracts of Ricinus communis L. leaves against Spodoptera frugiperda Smith larvae was also tested. A dosage -response relationship showed strong positive correlation (R2 = 0.92, P ≤ 0.05) between the nitrogen concentration in the hydroponic solution and ricinine percentage in leaves. A strong correlation (R2 = 0.94, P ≤ 0.05) was also shown for nitrogen content in tissues and ricinine percentage. The use of nitrogen in the form of KNO3 increased the production of ricinine, and it also affected mortality of S. frugiperda larvae. LC50 for ricine methanolic extracts of R. communis leaves on S. frugiperda were 13,469.12, 15,754.34, 16,046.11 and 18,155.75 mg mL-1 for nitrogen concentrations of 20, 15, 10 and 5 meq L-1 respectively. Increased nitrogen concentration in the hydroponic solution associated with increments in leaf area and ricinine concentration. This indicates that nitrogen concentration can be manipulated to improve production of this alkaloid, and the extracts used for crop protection.

Palavras-chave : Ricinus communis; Spodoptera frugiperda; hydroponic solution; nitrogen; ricinine.

        · resumo em Espanhol     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons