Bacillus subtilis has excellent effects on various diseases such as powdery mildew, gray mold, bacterial wilt, cruciferous root disease, root rot, rice sheath blight, bacterial blight, wheat powdery mildew and scab. Control effect can also increase crop yield, improve soil structure, and inhibit the growth and reproduction of nematodes.
Application in plant biocontrol:
Bacillus subtilis has a certain preventive effect on plant diseases and insect pests. Compared with traditional chemical pesticides, it is non-toxic and harmless to humans and animals, does not pollute the environment, is efficient and broad-spectrum, and has no resistance. Bacillus subtilis has been used as a powder wettable powder, etc., and the wettable powder made of Bacillus subtilis is sprayed on the tea tree, which not only improves the immunity of the body, but also has obvious effects of improving quality and increasing yield. Studies have shown that Bacillus subtilis can effectively control strawberry powdery mildew, which can improve crop quality and yield. Cell fusion of Bacillus subtilis and Bacillus thuringiensis produces a fusion agent CF103 with antibacterial and insecticidal effects. Field test results show that CF103 It can treat rice sheath blight and rice leaf roller; Bacillus subtilis TF26 can inhibit 13 species such as sunflower sclerotium, tomato and cucumber fusarium, cucumber sclerotinia, blight pathogen, and soybean root rot. The growth of plant pathogenic fungi is easy to be produced on a large scale due to microbial fermentation, which solves the dependence on raw material extraction in actual production and reduces the cost of prevention. Therefore, the application of Bacillus subtilis in the field of plant biocontrol has broad prospects.
Environmental protection:
Bacillus subtilis has certain applications in the purification and repair of micro-polluted water bodies such as lakes and reservoirs. In addition, the extracellular enzyme secreted by Bacillus subtilis when it is multiplied in water can decompose and absorb organic matter such as protein starch fat in water and sediment, which can remove ammonia nitrogen and nitro nitrogen in water, effectively reduce water eutrophication and remove water pollution. Mud is conducive to maintaining ecological balance, promoting the growth and reproduction of shrimp and crab, and is widely used in aquaculture.
The mechanism of use of Bacillus subtilis:
Root growth→Antibacterial sterilization→Improved soil→Promoting roots and seedlings→Increase production and quality
The roots of plants are the most important and a prerequisite for Bacillus subtilis to function. To put it simply, the formation of dominant flora, then how to form a dominant flora? Mixed with fungicides, first kill a part of the pathogens, second, mixed with humic acid, which is conducive to its growth and reproduction faster, and third, more fully cooked with crude fiber organic fertilizer.
Antibacterial sterilization is divided into two aspects, space occupying, and the growth of the beneficial bacteria of the hay can occupy the limited position of the plant and the pathogen cannot land. The second hay itself can secrete some lytic substances so that the pathogens that land can no longer harm the plants.
The improved soil can be analyzed from three aspects, improving the soil structure, promoting the decomposition of organic matter in the soil into humic acid, and secondly, fixing nitrogen, dephosphorizing and potassium, and improving fertilizer utilization. Third, it produces substances similar to cytokinins and plant-derived activins, and decomposes residues of heavy metals and pesticides.
As long as the above three points are made, the promotion of roots, the increase in production and quality can be described as natural.
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Use of Bacillus subtilis:
Fermented organic fertilizer: used together with other fertilizers or microbial spores, add 500g-1000g.
Formulated organic fertilizer: use this product 1-2kg/mu and farmyard manure. Fertilize or apply appropriate amount of fine soil, apply or chase after spraying, or spray directly with water.
Activate water, direct spray, drip irrigation, root irrigation, seed dressing, etc., 500g-2kg/mu, 15-20 days apart, can not be used together with fungicides and antibacterials.
