99 Water Soluble Chitosan Oligosaccharide COS Amino Oligosaccharide

Amino Oligosaccharide Chitosan Oligosaccharide COS

【Characteristic Mechanism】

Amino oligosaccharide (chitosan oligosaccharide) is a kind of low toxic bactericide, which is produced by chitin degradation and chitosan degradation, or by microbial fermentation.

Amino oligosaccharides (agricultural chitosan oligosaccharides) can inhibit the growth of some pathogens, affect the germination of fungal spores, induce morphological variation of mycelia, and change the biochemical characteristics of spores. It can stimulate genes in plants, produce chitinase, glucanase, protegerin and PR protein with disease resistance, and has cell activation function, which is conducive to the recovery of injured plants, promoting roots and seedlings, enhancing stress resistance of crops, and promoting plant growth and development.

Amino oligosaccharide solution has the function of killing virus, bacteria and fungi. It not only has a strong control and eradication effect on fungi, bacteria and viruses, but also has the functions of nutrition, regulation, detoxification and antibacterial. It can be widely used to control mosaic, bacterial leaf spot, anthracnose, downy mildew, Phytophthora blight, stem blight, yellow dwarf, rice blast, bacterial wilt, soft rot and other diseases caused by viruses, bacteria and fungi of fruit trees, vegetables, underground rhizomes, tobacco, Chinese medicinal materials and grain and cotton crops.

【Product Ispecifications】

【Product Function】

1, Amino oligosaccharide (COS), an inducible fungicide, have attracted more and more attention at home and abroad because of their wide sources, high inductive activity and ability to regulate plant growth and development. As a biopesticide, Amino oligosaccharide has many mechanisms in disease prevention and resistance. In addition to acting as an active signal molecule, Amino oligosaccharide can rapidly stimulate the defense response of plants, activate the defense system, make plants produce phenolic compounds, lignin, phytoalexin, disease related proteins and other disease resistant substances, and improve the activities of Defense enzymes and reactive oxygen species scavenging enzymes related to disease resistance metabolism The direct inhibition of plant pathogens is also an essential part of its disease resistance. It is generally believed that the antibacterial mechanism of amino oligosaccharide is: under acidic conditions, NH + 3 in the molecule of amino oligosaccharide dissociates and binds with anions such as silicic acid and phosphate contained in the cell wall of bacteria, thus hindering the large-scale reproduction of bacteria; then, Amino oligosaccharides are further de molecularized and enter into microbial cells through the cell wall, thus blocking the transcription process of genetic factors from DNA to RNA, The result is that microorganisms can't reproduce completely. Amino oligosaccharides are easy to degrade in the environment and will not pollute the environment at all. They have the dual biological regulation functions of efficacy and fertilizer efficiency. They can induce and activate the plant immune system and improve the plant antiviral ability. At present, amino oligosaccharide pesticides have good control effects on Watermelon Fusarium wilt, cotton Verticillium wilt, tomato late blight, tobacco virus disease, cucumber powdery mildew, lettuce Damping off, Pepper Blight, etc.

2, As a plant functional regulator, amino oligosaccharide can activate plant cells, promote plant growth, regulate the closure and opening of plant resistance groups, activate plant defense response, and start the expression of disease resistance genes. Amino oligosaccharide have been used as plant growth regulators in Japan to increase the yield of some crops. Zhang Wenqing et al. Studied the promoting effect of amino oligosaccharides on cucumber growth. The results showed that the cucumber plants treated with amino oligosaccharides not only had stronger resistance to downy mildew, but also could advance the fruit harvest time by 3-5 days, and the yield was significantly increased.

3, As a kind of plant growth regulator and antibacterial agent, seed coating agent amino oligosaccharide can induce plants to produce PR protein and phytoalexin. A new seed coating agent based on amino oligosaccharide has great potential for production. The application effect of amino oligosaccharide rape seed coating formulation was studied. Amino oligosaccharide obtained from chitosan degradation by chitosan enzyme was used as the basic component, mixed with chemical fertilizer, trace elements and preservatives, and then mixed into a stable colloidal solution. The seed dressing had no obvious effect on the germination and emergence of oilseed rape seeds, but it could promote the growth of oilseed rape, improve the rate of strong seedling and increase the yield The yield increase range was 4.33% ～ 9.67% with the increase of yield. The results showed that seed dressing with oligochitosan could significantly inhibit the occurrence of Sclerotinia sclerotiorum, and the control rates of three rape varieties were 34.19% - 44.1%.

4, Amino oligosaccharide (chitosan oligosaccharide) can induce crop resistance not only in biological stress but also in abiotic stress. The application of amino oligosaccharide has good effects on the resistance of crops to cold, high temperature, drought and flood, salt and alkali, fertilizer, gas and nutrient imbalance. This is because amino oligosaccharide has a good effect on crops and soil environment in many aspects. For example, some of the resistance substances induced by amino oligosaccharide can prevent, reduce or repair the damage of stress to plant cells; on the other hand, amino oligosaccharide can promote the growth of crops, and healthy plants naturally have strong resistance. The effect of amino oligosaccharide treatment on the metabolism of reactive oxygen species (ROS) in strawberry suspension culture cells was studied. The results showed that AOS could induce ROS burst and ROS scavenging enzyme activity in strawberry suspension culture cells. It could be considered that AOS treatment could directly induce the early increase of ROS production rate. This may be helpful to activate the reactive oxygen species signaling system and induce resistance signal transduction. However, the activities of cat and SOD, the scavenging enzymes of reactive oxygen species, increased significantly in the later stage of treatment, which could eliminate excessive reactive oxygen species and avoid the damage of reactive oxygen species accumulation to cells. Therefore, amino oligosaccharin treatment of strawberry cells can induce resistance reaction. In the practice of vast agricultural technology experts, we found that: when crop seedlings wilt due to low temperature and chilling injury, timely application of amino oligosaccharide can quickly restore the growth of plants; when the root system of crops is aging due to whatever reason, application of amino oligosaccharide can promote the development of active new roots; when the branches and leaves of crops are withered due to pesticide damage, application of amino oligosaccharide can promote the growth of plants, Application of amino oligosaccharide can assist detoxification and make it extract new branches and leaves quickly.

5, To improve the insecticidal activity and repellent activity, conventional insecticide formulations and application methods are difficult to make the pesticide fully contact with the target insects, and more of them remain in the environment, causing waste, environmental pollution and harm to human health. Therefore, how to improve the sustained-release performance of insecticides has become an urgent problem. Chitosan and chitosan oligosaccharide were used in indoor insecticidal experiment. The results showed that it had a certain insecticidal activity against Lepidoptera and Homoptera. Under the same concentration, the insecticidal activity against Plutella xylostella was higher than that against Helicoverpa armigera. The insecticidal activity against different aphids was generally between 60% and 80%, and the highest was 99%.