Bacillus subtilis widely exists in nature, not only active in the external environment of soil, plant rhizosphere, body surface, etc., but also common endophytic bacteria in plants, non-toxic and harmless to humans and animals, does not pollute the environment, has significant Antibacterial activity and strong resistance to stress.
Bacillus subtilis grows quickly, has simple nutrition, can produce heat-resistant and stress-resistant spores, and can be made into various dosage forms; it is mixed with chemical pesticides without inactivation, and the mass production process is simple, the cost is also low, the application is convenient, and storage Period is long. It is planted and produced, a necessary medicine!
Efficacy of Bacillus subtilis
Nutrition and spatial competition
The competitive effects of Bacillus subtilis mainly include nutritional competition and spatial site competition. It can reproduce and colonize the plant rhizosphere, body surface or body and soil quickly and in large quantities, effectively repel, prevent and interfere with the colonization and infection of plant pathogenic microorganisms on the plant, so as to achieve the effect of bacteriostasis and disease prevention .
Production of bacteriostatic substances
Bacillus subtilis can produce a variety of substances with bacteriostatic and bacteriolytic effects during the growth process, such as subtilisin, organic acids, antibacterial proteins, etc. These substances can inhibit the growth and reproduction of pathogenic bacteria, even destroy the bacterial structure and kill Pathogens. Therefore, Bacillus subtilis is very effective in preventing and controlling diseases such as stubble, root rot, and gray mold.
Boost immunity and promote growth
Bacillus subtilis can secrete active substances, activate plant defense systems, enhance crop immunity and disease resistance, and reduce or eliminate the damage of pathogenic bacteria to plants.
Can also promote the growth and development of various plant seeds, seedlings and roots, enhance the plant's disease resistance, thereby indirectly reducing disease occurrence. Such as increasing the formation of indoleacetic acid and other auxins to stimulate the development of crop roots and enhance photosynthesis. At the same time, it converts the hard-to-absorb materials in the soil into materials that are easy for crops to absorb, promotes the absorption and utilization of nutrients by the crops, and improves the fertilizer utilization rate.
Induce resistance in plants
Bacillus subtilis not only can directly inhibit plant pathogenic bacteria, but also can enhance plant disease resistance by inducing the plant's own disease resistance potential. For example, Bacillus subtilis, a biocontrol bacterium for rice sheath blight, can induce the increased activity of disease-resistant enzymes (POD, PPO, and SOD) in rice leaf sheath cells to achieve disease resistance.
Improve soil structure
Bacillus subtilis forms a probiotic environment in the soil, promotes the formation of agglomerate structure, improves the soil's ability to retain fertilizer and water, increases soil looseness and promotes root growth. Specifically, it accelerates the mineralization of nutrients and changes nutrients from ineffective and slow-acting states to effective and quick-acting states. At the same time, accelerate the humification of nutrients, secrete phytase, degrade most of the phytate in the soil; produce auxin, stimulate crop growth, improve seed survival rate and emergence rate.
