Production & formulation of Bacillus thuringiensis var. israelensis & B. sphaericus 1593.
Article
in English
| IMSEAR
| ID: sea-21023
ABSTRACT
Three fermentation media each for bulk growth of B. thuringiensis var. israelensis and B. sphaericus 1593 were formulated using defatted groundnut cake (Arachis hypogea) as the first nitrogen source and gram flour (Cicer arientinum), soy bean (Glycine max) and defatted milk powder as the second nitrogen source. Medium containing gram flour showed highest toxicity (14.45 micrograms/l) in case of B. thuringiensis var. israelensis whereas medium containing milk powder was found to be highly toxic with B. sphaericus 1593 (51.39 micrograms/l). Sustained release floating pellet formulations of B. thuringiensis var. israelensis and B. sphaericus 1593 exhibited toxicity of 77 per cent and above for 42 days at a dose of 500 micrograms/l for 4th instar larvae of Culex pipiens quinquefasciatus Say.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Bacillus
/
Bacillus thuringiensis
/
Pest Control, Biological
/
Culex
/
Culture Media
/
Delayed-Action Preparations
/
Larva
/
Animals
Language:
English
Year:
1991
Type:
Article
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