In agricultural production, many pathogens pass through plant residues for wintering and summering. With the return of straw to the field and the promotion of no-tillage technology, the development of green agriculture, the treatment of plant residues in production is not enough, and a large number of plant pathogens remain in the soil. Under suitable conditions, the germs in the soil begin to grow and infect the plants, which has a serious impact on the growth and development of the plants. There are many kinds of soil-borne diseases, and different crops are different.

Soil-borne diseases refer to the pathogens living in the soil or the pathogens in the soil residue of the disease, which mainly damage the roots and stems of the plants, infect the vascular bundles, and develop from the roots to the shoot tips. The pathogens multiply in the vascular bundles and block them. The nutrients are transported, causing the plants to wither and die.

The Common soil-borne diseases include powdery mildew, anthracnose, gray mold, rust, blight, stagnation, chalk disease, soot, black spot, root rot, seedling stem rot, sclerotinia , bacterial wilt, leaf spot, soft rot, etc.

Trichoderma harzianum is the kind of microbes that can help crops defend diseases.

  General Information  

Dora RootGuard is biological fertilizer product for protecting a number of crop plants from damage, such as soilborne plant pathogens and plant root diseases.The active ingredient is trichoderma harzianum.

After we used the Dora Rootguard,the active ingredient(trichoderma harzianum) will forms a physical bond with the plants root system,establishing itself in the rhizosphere(root zone) and thereby preventing other pathogens.

This bond and continual growth of the trichoderma harzianum throughout the root system forms a physical barrier to pathogens in soil. 

Trichoderma harzianum also attack/parasitize and otherwise gain nutrition from other fungi. They have evolved numerous mechanisms for both attack of other fungi and for enhancing plant and root growth.

Treating seedlings with microbial inoculants is also a good idea. Some microbes fix nitrogen from the air and feed it to the plant, others solubilize phosphorus, and some produce plant protection agents and rooting hormones. For example, some micro-organisms produce the amino acid tryptophan on the surface of the roots. The root cells easily absorb the tryptophan and transport it to the leaves, where it is converted into IAA. The IAA is then pumped to the roots to stimulate the growth of new root hairs.

Beneficial microbes also produce siderophores. The word siderophore literally means “iron carrier.” One of the strongest chelators of iron in nature, siderophores act indirectly as plant protection agents. As beneficial bacteria colonize the root surface, siderophores sequester iron and make it unavailable to foreign invaders so the roots are protected from root pathogens such as pythium and rhizoctonia. Some soilless mixes take advantage of the process by adding certain species of bacillus subtilis to the blend and calling it a biofungicide.