Evaluation of Bacillus sphaericus bioinsecticide produced with white soybean meal as culture medium for the control of Culex (Culex) quinquefasciatus

Cadernos de Saúde Pública

André L. A. Melo²  Carlos R. Soccol¹  Vanete Thomaz-soccol¹  Miodeli Nogueira Jr.s¹ 

[1],Universidade ParanaenseFrancisco Beltrão,Brasil

关键词: Insecticides;    Vector Control;    Soybeans;    Inseticidas;    Controle de Vetores;    Soja;   

DOI  :  10.1590/S0102-311X2009000300011

来源: SciELO

【 摘 要 】

Bioinsecticides are shown to be useful in control programs to prevent several diseases, based on their specificity and efficiency against insect vectors. In the current study a bioinsecticide based on Bacillus sphaericus was produced using a white soybean culture medium and applied to larvae of Culex quinquefasciatus, the susceptible species, and Aedes aegypti, the refractory species used as the negative control. Efficacy was compared with that of the product fermented with the Luria Bertani (LB) reference medium. The experiments showed that C. quinquefasciatus was highly susceptible to the product prepared with white soybean meal, reaching 100% larval mortality even at 10mg/L, while A. aegypti failed to reach 70% mortality at a concentration of 1g/L. By comparison with the reference medium, the proposed culture medium showed high larvicidal power, reaching a LD90 of 2.26mg/L, while 4.37mg/L was needed for the LB medium to achieve the same mortality rate. Cost comparison between the formulations favored the use of the bioinsecticide produced with white soybean meal. After factoring in the LD90 value, the cost ratio favored the new raw material by nearly 1:220.

【 授权许可】

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