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vol.25 número2FERTILIZANTE ORGANOMINERAL E ARGILA SILICATADA COMO INDUTORES DE RESISTÊNCIA Á VARÍOLA DO MAMOEIROCULTIVO DE TOMATE (LYCOPERSICON ESCULENTUM MILL.) HIDROPÓNICO CON AGUA DESALINIZADA Y DESBORIFICADA EN EL VALLE DE LLUTA índice de autoresíndice de assuntospesquisa de artigos
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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

DIAS DE ALMEIDA, Gustavo et al. DETERMINATION OF THE MEDIUM LETHAL CONCENTRATION (CL 50) OF BEAUVERIA BASSIANA FOR THE CONTROL OF BREVICORYNE BRASSICAE. Idesia [online]. 2007, vol.25, n.2, pp.69-72. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292007000200009.

The cabbage aphid is one of the main curses of Brássicas in general, and the search for healthier foods has been stimulating the development of techniques inside of the maintainable handling, as the microbial control. The objective of this work was determine concentrations of the microbial B. bassiana for the handling of the cabbage aphid. Nymphs of B. brassicae were inoculated in submerged cabbage leaves in fungic suspensions , of the commercial product Boveril®, in the concentrations of 0.05, 0.08, 0.12, 0.31, 0.50, 1.0, 1.5, 2.0 grams per liter of distilled water plus adhesive espalhante Hai-Teem®, and maintained 26.0 ± 1.0°C and UR of 75.0 ± 5%. There was an increment of the mortality in function of the increase of the concentration, because, to smallest concentration (0.05g/L) it presented reduced effect of control 14% of confirmed mortality. However, the concentrations of 1.0-2.0g/L of water provided a superior mortality of 85%. The value found for CL50 was of 0.233g/L. In that way the microbial control of the cabbage aphid can be economical and biologically viable for the handling of this pest in brássicas cultivations.

Palavras-chave : Control microbial; entomopathogenic fungus; integrated handling; CL 50.

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