Flocculation of Bacillus thuringiensis var. Israelensis suspension and its efficacy against mosquito larvae

Á Szepesszentgyörgyi, S. Bárány, I. Mécs

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Bacillus thuringiensis ssp. israelensis (Bti) is increasingly used as an ecologically friendly anti-mosquito agent. The bacterium cells undergo fermentation in dilute suspensions; before practical use, therefore it is necessary to concentrate the suspensions. Aggregation by polymers is a powerful tool with which to regulate the stability of suspensions. Typically, polymers at low concentrations destabilize and at high concentrations stabilize colloidal systems. Bti suspensions can be flocculated efficiently by either cationic or anionic polyelectrolytes. Cationic polyelectolytes were found to be the most efficient flocculants for bacterial suspensions. It was shown that the degree of toxicity of the flocculated Bti suspensions for biting mosquito larvae was in the same range than in non-flocculated suspension.

Original languageEnglish
Pages (from-to)151-164
Number of pages14
JournalActa Biologica Hungarica
Volume56
Issue number1-2
DOIs
Publication statusPublished - 2005

Fingerprint

Bacillus thuringiensis subsp. israelensis
Flocculation
Bacillus thuringiensis
flocculation
Bacilli
Culicidae
mosquito
Larva
insect larvae
Suspensions
polymer
larva
fermentation
toxicity
bacterium
polymers
Polymers
flocculants
Polyelectrolytes
Fermentation

Keywords

  • Cellular suspension
  • Flocculation
  • Polyelectrolytes
  • Sedimentation
  • Toxicity

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Flocculation of Bacillus thuringiensis var. Israelensis suspension and its efficacy against mosquito larvae. / Szepesszentgyörgyi, Á; Bárány, S.; Mécs, I.

In: Acta Biologica Hungarica, Vol. 56, No. 1-2, 2005, p. 151-164.

Research output: Contribution to journalArticle

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