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Plant Growth Regulator - Thidiazuron
2021/1/19 16:28:26


Plant Growth Regulator - Thidiazuron


Tidiazuron is used as a defoliant in cotton cultivation. After being absorbed by the plant, it can promote the natural formation of the separated tissue between the petiole and the stem and fall off. It is a good defoliant. . On the other hand, it has extremely strong cell division activity, and its ability to induce plant cell division and callus is more than a thousand times higher than that of general cytokinins. It is also an excellent cytokinin, which promotes fruit expansion and delays plant senescence. Enhance its resistance to stress, promote photosynthesis of plants, increase crop yield and improve product quality.

 

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1. Other names

Tuoyeling, Teflon, Dropp, etc.

 

2. Chemical name

1-Phenyl-3-(1,2,3,-thiadiazol-5-yl)urea

 

3. Physical and chemical properties

Colorless and odorless crystals, melting point 213 (decomposition), vapor pressure 4nPa at 25. At 23°C, the solubility in water is 200mg/L.

 

4. Toxicology and safety

Thidiazuron is moderately toxic to fish and aquatic organisms. It is not very toxic to birds or bees . It is not readily biodegradable. The World Health Organization has substance classification: It was rated unlikely to present acute hazard in normal use.

 

5. Formulation

50% wettable powder, 0.2%, 0.5% soluble liquid

 

6. Action

Thidiazuron is a urea plant growth regulator. It is absorbed by cotton leaves and affects the three main plant hormones in plants-ethylene, auxin and cytokinin, and promotes the formation of natural separation between the stems, leaves and petioles of cotton, leading to Cotton leaves. It has strong biological activity, and its ability to induce plant cell division and tissue callus is hundreds of times higher than that of general cytokinins. It can relieve gene repression, open the code of DNA and RNA, trigger the synthesis of related enzymes and proteins, coordinate the secretion of plant endogenous hormones, and induce and activate the expression of plant SAR (systemic resistance) genes.

 

7. Applicable crops

Thidiazuron is mainly used as a defoliant for cotton, and can also be used for defoliating apple trees, grape vines, hibiscus, kidney beans, soybeans, peanuts and other crops to regulate growth.

 

8. Control objects

Mainly used as cotton defoliant, it can also be used for defoliating apple trees, grape vines, hibiscus, kidney beans, soybeans, peanuts and other crops. When used at high concentrations, it can also be used to control weeds such as barnyard grass, dog tooth grass, crabgrass, mittens, creeping grass, and pigs. Used at ultra-low concentrations, it can also be used as a fruit expander.

 

9. Attention

  • The application period should not be too early, otherwise it will affect the yield.

  • The defoliation effect of thidiazuron is very good, but it is greatly restricted by weather conditions. It is best to choose to use it in sunny days to achieve good results.

  • When using, avoid the liquid medicine from drifting to other crops to avoid phytotoxicity.


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