Effect of exposure to soil on potency and spore viability of Bacillus thuringiensis
Authors: Pruett, C.J.H., Burges, H.D., Wyborn, C.H.
Journal, Volume, Year: Journal of Invertebrate Pathology, volume 35:168-174, 1980
Study of the viability of Bt var galleriae in clay loam soil. Spores and endotoxin were extracted periodically from a soil mixture. The number of spores fell to 24% over 135 days and pathogenicity fell to less than 1%.