Plant extracts for crop protection

Plant extracts are phytogenic biostimulants refer to some highly active substances extracted from plants, such as glycosides, acids, polyphenols, and polysaccharides, which can regulate crop growth and development, improve crop stress and disease resistance, and promote crop nutrient absorption. , terpenes, flavonoids, alkaloids, etc.


In fact, our commonly used plant growth regulators are all produced from artificially synthesized analogues based on the structures of active substances extracted from plants. As the active substances in plant extracts are more natural and have a stronger affinity with crops, they have better regulating and stress-resistance effects.

Microorganisms and metabolites for crop protection

Microorganisms and metabolites: Microbial inoculants refer to a type of beneficial fungi and bacteria rich in specific living microorganisms. Through the life activities of the microorganisms they contain, they can increase the supply of plant nutrients or promote plant growth, increase yields, and improve the quality of agricultural products and agricultural ecological environment.
Common microbial inoculants are found in a variety of environments, including soil, plants, plant residues, water, and fertilizer compost.
Research shows that the application of microbial inoculants can significantly increase the amount of microorganisms in the soil, and the increased activity of these microorganisms can promote the enhancement of soil enzyme activity, and can decompose and release insoluble mineral nutrients in the soil. At the same time, At the same time, these microorganisms can also secrete plant hormones, thereby promoting crop growth.

Microorganisms can produce a variety of metabolites during their growth and metabolism. According to the relationship between metabolites and microbial growth and reproduction, they are divided into two categories: primary metabolites and secondary metabolites.
Primary metabolites refer to substances produced by microorganisms through metabolic activities and necessary for their own growth and reproduction, such as amino acids, nucleotides, polysaccharides, etc.
Secondary metabolites refer to substances produced by microorganisms that have no obvious physiological function or are not necessary for the microorganisms after they grow to a certain stage, such as antibiotics, toxins, hormones, pigments, etc.
Microbial metabolites used for biological control of plant diseases are mainly secondary metabolites.
Disease-resistant microorganisms can produce a variety of antibacterial substances, including antibiotics, lipopeptides, polypeptides, chitinase, β-1,3-glucanase, protease, cellulase, active proteins and volatile substances.

What is Biostimulant?

Biostimulant is a substance or microorganisms that, when applied to seeds, crops or roots, stimulates their natural growth processes, thereby enhancing or promoting nutrient absorption, fertilizer use efficiency, crop tolerance to abiotic stress, or improving crop quality and yield.

About Tea Saponins

Tea saponins are triterpenoid saponins from Camellia plants, and consist of a sapogenin, glycosides and organic acids. Up to 2013, at least 93 tea saponin monomers from the seeds, roots and flowers of tea plants have been isolated and identifined.

Tea saponins are excellent natural biosurfactant, and possess a variety of pharmacological activities such as anti-inflammatory, anti-fungal, anti-bacterial, anti-cancer, hypolipidemic and gastric mucosal protection.

In addition, Tea saponins can be used for the recovery of heavy metals from wastewater and contaminated soils due to their high binding capacity with metal ions.

These properties make Tea saponins can be applied in pesticides, feed, aquaculture, textile, pharmaceuticals, cosmetics, building materials and environmental modification.

Applications of tea saponin in pesticide

According to the analysis of current research results, the application scope of tea saponin in the pesticide industry can be divided into four major categories:

One, tea saponin is as a wetting agent and suspending agent in solid pesticides.
Second, tea saponin is used as a synergist and spreading agent in emulsifiable concentrate pesticides.
Third, tea saponin is used as a co-solvent in herbicide pesticides or pesticides that are slightly soluble in water.
The fourth tea saponin is to directly use it as a biological pesticide.

Plant extracts

Phytogenic biostimulants refer to some highly active substances extracted from plants, such as glycosides, acids, polyphenols, and polysaccharides, which can regulate crop growth and development, improve crop stress and disease resistance, and promote crop nutrient absorption. , terpenes, flavonoids, alkaloids, etc.

In fact, our commonly used plant growth regulators are all produced from artificially synthesized analogues based on the structures of active substances extracted from plants. As the active substances in plant extracts are more natural and have a stronger affinity with crops, they have better regulating and stress-resistance effects

Microorganisms and metabolites

Microbial inoculants refer to a type of beneficial fungi and bacteria that are rich in specific living microorganisms. Through the life activities of the microorganisms they contain, they can increase the supply of plant nutrients or promote plant growth, increase yields, and improve the quality of agricultural products and the agricultural ecological environment. Common microbial inoculants are found in a variety of environments, including soil, plants, plant residues, water, and fertilizer compost. Research shows that the application of microbial inoculants can significantly increase the amount of microorganisms in the soil, and the increased activity of these microorganisms can promote the enhancement of soil enzyme activity, and can decompose and release insoluble mineral nutrients in the soil. At the same time, At the same time, these microorganisms can also secrete plant hormones, thereby promoting crop growth.

Microorganisms can produce a variety of metabolites during their growth and metabolism. According to the relationship between metabolites and microbial growth and reproduction, they are divided into two categories: primary metabolites and secondary metabolites. Primary metabolites refer to substances produced by microorganisms through metabolic activities and necessary for their own growth and reproduction, such as amino acids, nucleotides, polysaccharides, etc. Secondary metabolites refer to substances produced by microorganisms that have no obvious physiological function or are not necessary for the microorganisms after they grow to a certain stage, such as antibiotics, toxins, hormones, pigments, etc. Microbial metabolites used for biological control of plant diseases are mainly secondary metabolites. Disease-resistant microorganisms can produce a variety of antibacterial substances, including antibiotics, lipopeptides, polypeptides, chitinase, β-1,3-glucanase, protease, cellulase, active proteins and volatile substances.

Chitin and its derivatives

Chitin is a component of the exoskeletons of insects and crustaceans and the cell walls of fungi. Crustaceans and fungi are the main sources of industrial chitosan extracts.

Chitin is a component of the shells of marine crustaceans and the cell walls of many fungi. It is a linear polysaccharide formed by N-acetylglucosamine connected through β-1,4 glycosidic bonds.

Chitosan is the deacetylation product of chitin, while chitosan oligosaccharides is the degradation product of chitin.

Chitin and high molecular weight chitosan have poor solubility, while low molecular weight chitosan and chitosan oligosaccharides have good water solubility and are therefore widely used in agricultural production.

Chitin and chitosan have biological activity and are often used as plant protection agents, anti-transpiration agents, and growth stimulants.

Chitosan derivatives act as polycations and lipid-binding molecules outside cells, forming chitosan protective films on plant leaves to protect plants from pathogens.

By increasing plant cell permeability, it improves nutrient absorption, promotes root development, increases plant photosynthesis, regulates crop growth and induces plant disease resistance. In addition, chitosan can also inhibit the growth of pathogenic bacteria in the soil, and can effectively improve the soil aggregate structure, thereby increasing crop yield and quality.

Disease by Fusarium

Head blight and root rot caused by Fusarium are fungal diseases that threaten the safe production of various food crops and can cause grain yield reduction and grain quality degradation.

Fusarium-infected grains in the field can also cause problems such as grain deterioration and toxin contamination during storage.

Fusarium species complete the infection by forming infection structures, synthesizing cell wall degrading enzymes (CWDE) and toxins to resist host defense responses and destroy plant tissues.

The functions of various amino acids in plants

Aspartic acid
①Multifunctional amino acids that play a role in all developmental pathways of plants
② Promote plant growth, development and stimulation.
③ Improves seed germination, protein synthesis, and provides nitrogen for production during periods of stress.
Glutamic acid
① Reduce nitrate content in crops, improve seed germination, promote leaf photosynthesis, and increase chlorophyll biosynthesis.
②It interferes with the flowering and fruit setting of future fruits (usually recommended at this stage).
③Promote the absorption of other amino acids.
Alanine
①Alanine is related to helping photosynthesis and obtaining chlorophyll. It increases the synthesis of chlorophyll and promotes greener plants. It also regulates the opening of stomata and enhances the metabolic activity of plants.
② Resistant to germs.
Arginine
① Arginine is a natural precursor of auxin coenzyme, a prerequisite for the synthesis of plant endogenous hormone polyamines, and improves the ability to resist salt stress.
②Promote the development of leaves, stems and new shoots.
③ Stimulate the development of root system (methionine also has a similar effect).
④ It is an amino acid used as a stimulant. It is recommended to use foliar spraying (as a stimulant) and integrated fertilizer and water fertilization (to combine nutrients in the soil and stimulate root development).
Asparagine
①Enhance the absorption of nitrogen.
② Used in the case of chlorophyll deficiency caused by nitrogen deficiency, or as a stimulant for foliar spraying.
Phenylalanine
① Promote the synthesis of quinine, the precursor substance for anthocyanin synthesis.
② It is a special component in protein synthesis and phenolic compound or oil synthesis. For extracting plant extracts that may have medicinal uses, participate in the plant’s own defense system.
③The activation of anisic acid pathway is very related to phenylalanine.
Glycine
① It has a strong chelation effect, so the high content of glycine helps the absorption of nutrients. It is recommended to be applied to the soil to form complexes with nutrients trapped in it, or added to irrigation fertilizer tanks (provided its pH is compatible with glycine itself).
②Glycine also plays a positive role by improving the flowering and fertilization process, so it also makes sense to use it in the period before flowering.
③ Since glycine is closely related to chlorophyll and photosynthesis, it increases the sugar content of crops, and its application also promotes the growth and budding of new shoots.
Hydroxyproline
①Amino acids related to flowering period, pollination and fruit setting.
Histidine
①Related to the metabolic balance and health of plants.
②Activate the protection and defense mechanisms of plants.
③Regulate stomatal opening and provide the prerequisite for carbon skeleton hormones and catalytic enzymes that cooperate with cytokinin.
Isoleucine
① Regulatory amino acids. Balances the internal mechanisms of the plant, improves the characteristics of leaf tissue and provides energy shock to improve resistance to salt stress.
Leucine
① Improves pollen viability and germination, it is very interesting to apply during the flowering and fruit setting stages because it enhances flowering and reduces late fruit drop (fruit abortion). It is also very interesting to apply in olive groves.
Lysine
① Provide resistance in harsh environments, especially drought conditions.
②Related to chlorophyll synthesis, enhancing chlorophyll synthesis.
③ Acts as a catalyst in nitrogen absorption.
Methionine
①Promote fruit ripening and color acquisition.
②Precursors for the synthesis of plant endogenous hormones ethylene and polyamines.
③Irrigation and fertilization (applied to irrigation) are beneficial to root growth.
④Related to the absorption of nitrate.
Proline
① Proline is a regulator of internal functions of plants and is usually activated under plant stress conditions, increasing plant tolerance to osmotic stress. Therefore, external application of this amino acid is very beneficial to get rid of negative situations in situations such as drought, cooling, wind or hail.
② Improve plant stress resistance and pollen vitality.
Serine
① It is the precursor for the formation of other amino acids.
② It is a regulator of the mechanism or pathway of plants to resist attacks (such as herbivore attacks, mechanical damage, etc.).
③Participate in cell tissue differentiation and promote germination.
Tyrosine
① Provides energy for crops and has anti-stress and anti-impact effects on plant metabolism.
② It is the precursor of plant defense mechanism and increases drought tolerance.
③Improve pollen germination.
Threonine
① Helps plant growth.
② Suitable for use when plants are in a stagnant phase or require stimulation.
③ Improve tolerance to insect pests and diseases, and improve humification process.
Tryptophan
① The endogenous hormones auxin and indole acetic acid are synthesized precursors to improve the synthesis of Fen compounds.
②Activate plant defense pathways (animal attack, mechanical damage, drought, etc.).
Valine
① Valine can enhance and promote seed germination, so it can be added when watering, or soaked directly before planting.
②Helps plants resist stress, such as low temperature, low soil temperature, etc.
③Improve the flavor of crops.