Back to Search
Start Over
Studies on granular formulations of Bacillus thuringiensis berliner.
- Source :
- Pesticide Science; 1973, Vol. 4 Issue 1, p19-23, 5p
- Publication Year :
- 1973
-
Abstract
- Survival of the spores of Bacillus thuringiensis in granular formulations has been tested under storage conditions in the laboratory and also outdoor conditions exposed to weather. The granular formulations were prepared with attapulgite and aqueous and non-aqueous carriers. The virulence of the spore formulation was tested on Bombyx mori larvae. A 0.4% spore concentration, with an initial count of 64 × 10<superscript>6</superscript>, gave ultimately 0.3 to 0.4 × 10<superscript>6</superscript> viable spores/g of the granule after 248 days of storage in the room. The viable count of spores in the granules exposed to outdoor weather conditions fell rapidly within two days; at the end of 65 days, it was maintained at between 3 × 10<superscript>4</superscript> and 12 × 10<superscript>4</superscript>/g of the granules. Optimum concentrations required in granules for 100% mortality of the test insect was found to be 0.4 × 10<superscript>6</superscript> spores/g, at the rate of 50 mg of granules per 85 cm<superscript>2</superscript> of leaf surface. The granular formulation of B. thuringiensis was found to be more virulent than 'Thuricide' formulation on B. mori larva. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0031613X
- Volume :
- 4
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Pesticide Science
- Publication Type :
- Academic Journal
- Accession number :
- 91108444
- Full Text :
- https://doi.org/10.1002/ps.2780040104