2 research outputs found
Development of a Bacillus sphaericus tablet formulation and its evaluation as a larvicide in the biological control of Culex quinquefasciatus
Development of a Bacillus sphaericus tablet formulation and its evaluation as a larvicide in the biological control of Culex quinquefasciatus
This study aimed to analyze the final fermentation culture of Bacillus
sphaericus 2362, standardize it and develop an active tablet
formulation for use in urban mosquito breeding sites. It was performed
in three phases: analysis and standardization of a B. sphaericus
fermented culture; physical, chemical, and biological analysis of the
active powder (solubility, residual humidity, particle size, resting
angle, flowing off time, compacted density, and biological activity
against Culex quinquefasciatus larvae); and the development of
fast-disintegrating tablets. Five formulations with differing
compositions were developed and a UV protector was added to the
selected formulation. The formulation products with or without UV
protector, as well as the active powder caused 100% larval mortality
from 1 day to 2 months after a single treatment under simulated field
conditions. These results show that the UV protector does not affect
the initial larvicide activity of B. sphaericus, nor its persistence
over a period of two months