Bacillus subtilis is a spore forming bacterium which, when applied to the seeds or plants, it colonizes the developing root system of the plants. The bacterium competes with and thereby suppresses fungal disease such as Rhizoctonia, Fusarium, Aspergillus, and others.
Bacillus subtilis continue to live on the root system and provide protection throughout the growing season. Therefore, even if treated seeds are stored for prolonged periods, the bacteria stay alive, and then grow and multiply after the seeds are planted.
Contego BSub is a bio-fungicide to aid in the control of Botrytis, powdery mildew and other fungal pathogens on grapes, fruits, potatoes, ornamentals and vegetables.
Bacillus subtilisworks in the four following ways:
Through direct competition,Bacillus subtilis grows a defensive barrier around the root system, or rhizosphere, thereby shielding the roots from harmful attacking fungi.
It produces a chemical similar to an antibiotic, which is toxic to the invading pathogen. This process is called antibiosis.
Additionally, it attacks and feeds on the harmful pathogen. The biofungicide has to be in the rhizosphere either before or at the same time as the pathogen.
Lastly, introducing Bacillus subtilis kick starts the plant’s own immune defense mechanisms, enabling it to successfully fight off the invading harmful pathogen.