As a kind of biocontrol bacteria, Trichoderma harzianum can be used to prevent plant diseases caused by pathogenic bacteria such as Pythium, Rhizoctonia solani, Fusarium, Rhizopus, Haloxylon, Sclerotinia and Sclerotium.
Effects of Trichoderma harzianum in agriculture
Competitive effect: Trichoderma harzianum can grow rapidly in the plant’s root and leaf circumference, seize the site of the plant body, form a protective cover, just like putting boots on the plant, prevent the pathogenic fungi from touching the root system and leaf surface. In order to protect the roots and leaves of plants from the above-mentioned pathogens, and ensure the plants can grow healthily.
Heavy parasitism: Heavy parasitism refers to the complex process of identifying, contacting, entangling, penetrating, and parasitizing pathogenic bacteria in a series of consecutive steps. In the interaction between Trichoderma and pathogenic bacteria, the host mycelium secretes some substances that cause the Trichoderma to grow towards the host fungi. Once the host is recognized by the Trichoderma parasite, a parasitic relationship will be established. After Trichoderma was recognized by host fungi, Trichoderma mycelia grew parallel and spirally wound along the host mycelium, and attached celllike branches were adsorbed on the host mycelium, which secreted extracellular enzymes to solubilize the cell wall and penetrated the host mycelium. Absorb nutrition and kill pathogens.
Effect of antibiotics: Trichoderma harzianum can secrete part of antibiotics, which can inhibit the growth and colonization of pathogens and reduce the damage of pathogenic bacteria.
Plant growth regulation: Trichoderma colonizes plant roots and produces compounds that stimulate plant growth and induce plant defense responses, improve root microenvironment, enhance plant growth and disease resistance, increase crop yields and yields, and induce plant resistance , start the plant defense response. Trichoderma harzianum can be metabolized to produce xylanase. Under the action of xylanase, plants have a clear defense reaction, K+, H+, Ca2 + ion channels are opened, ethylene is synthesized, and PR protein is accumulated. Trichoderma harzianum produces chitinase and β-1 ,3-glucanase plays an important role in anti-phytopathogenic fungi. The plant’s defense response can be initiated, leading plants to produce and accumulate phenolic compounds and lignin associated with disease resistance. At the same time, the protease produced by it can degrade the pathogens of the cell wall of the digestion plants, directly inhibit the germination of the pathogens, passivate the enzymes of the pathogens, and prevent the pathogens from invading the plant cells.
So the problem has come from the strong ability of Trichoderma harzianum. Why do different people use different effects? ?
The first method of use is one of the important factors affecting the effect of Trichoderma harzianum. Next, let’s takes everyone to learn about the use of Trichoderma harzianum:
How to use Trichoderma harzianum
(1) Seed dressing: Put the seeds in clean water and soak them out to control the dryness. Then spread the product on the seeds, mix well, and dry after sowing.
(2) Mixing soil: When using as fertilizer or base fertilizer, mix this product with fluvo-aquic soil, apply it around the seeds or evenly spread it in Honda. The closer to the root system of the seeds, the better.
(3) Irrigation.
(4) Roots: For transplanting crops, the product is mixed with a proper amount of water and then roots or bulbs can be removed.
(5) Fertilizer: When used as seed fertilizer or base fertilizer, the product can be mixed with chemical fertilizer or organic fertilizer, and be used together with fertilizer. It must be used with the mixture to prevent the fertilizer from melting and affect the quality of sowing fertilizer.
(6) Potted soil and seedbed mixed soil: According to the water consumption, firstly configure the mother liquor, and then mix well.
(7) Spraying seedbed: Use 2-3g of medicament per square meter, and then spray on the seedbed.
(8) Trichoderma can mainly control various soil-borne diseases (Pythium, Rhizoctonia, Fusarium, etc.) and airborne diseases such as gray mold and powdery mildew. In general, soil-borne diseases are irrigated, diluted 500 times, and each irrigated root is about 300ml. Airborne diseases are mainly sprayed, diluted 200 times or so, ie 100g can be diluted to 20L water, when spraying, pay attention to soaking for 12-24 hours to fully activate the spores, and use the upper layer to clarify the bacteria for spraying. The lower sediment carrier can be applied to the field crops.
The storage of Trichoderma harzianum
The living body was stored at room temperature for 6 months, kept at 4°C for more than one year, and existed as dormant spores at low temperature.
The appropriate temperature is 10-34 degrees, the working environment pH 4-8.
This article is from:http://www.doraagri.com/trichoderma-harzianum/