A set of 38 Bacillus strains isolated from peanut geocarposphere soil were screened as potential biological control agent anti-
Aspergillus parasiticus. Tip-culture method with rapid and quantitative characteristics was used to determine anti-A. parasiticus
activity and the process of isolation could be accelerated with this method. 12 out of 38 Bacillus strains showed high anti-aflatoxin
production activity. These 12 Bacillus strains were selected to identify the characteristics of promoting peanuts germination rate.
Pot experiment in greenhouse was carried out by using these strains which can promote peanuts germination. Phytohormones in
the fermentation broth were also detected as another important reference factor to select the isolates as biological control agent
with PGPR features. These Bacillus strains isolated from peanut geocarposphere soil not only had high ability anti-Aspergillus
parasiticus, but also promoted peanut growth. Therefore, these Bacillus strains were well adapted to peanut production in the
field as biological control agent with plant growth promoting rhizobacteria (PGPR) features.