IDESIA (Chile) (2007) 25, 69-72

Gustavo Dias de Almeida, Dirceu Pratissoli, Ricardo Antônio Polanczyk, Anderson Mathias Holtz and Victor Bernardo Vicentini (2007)
Determinação da concentração letal média (Cl 50) de Beauveria bassiana para o controle de Brevicoryne brassicae
[Determination of the medium lethal concentration (LC50) of Beauveria bassiana for the control of Brevicoryne brassicae]
IDESIA (Chile) 25 (2), 69-72
Abstract: The cabbage aphid is one of the main curses of Brassicas 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 LC50 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 Brassica cultivations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Ricardo Antonio Polanczyk, Dirceu Pratissoli

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Brevicoryne brassicae
Beauveria bassiana (entomopathogen)	Brevicoryne brassicae