Thidiazuron
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Thidiazuron

Thidiazuron (TDZ) is a diphenylurea synthetic herbicide and plant growth regulator used to defoliate cotton crops and to induce regeneration of recalcitrant species in plant tissue culture.
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  • 51707-55-2
  • 98%TC, 50%WP, 80%WP, 50%SC

Thidiazuron



Common nameThidiazuron



CAS No.51707-55-2

                


Thidiazuron



Specification98%TC, 50%WP, 80%WP, 50%SC



Molecular formulaC9H8N4OS



Structural formula:

Thidiazuron



Thidiazuron



Mode of action: 

Thidiazuron (TDZ) is a diphenylurea synthetic herbicide and plant growth regulator used to defoliate cotton crops and to induce regeneration of recalcitrant species in plant tissue culture.



Uses: 

Description: A herbicide and defoliant plant growth regulator which stimulates ethylene production in some crops particularly cotton.

Main effects: Accelerate ripening, make the leaves fall off, increase yield, and increase quality.

Example plants: Cotton; Mung bean; Melon.

 

Application 50%WP

Crop/situation

Defoliation condition

Rate/Ha

Critical comments

Cotton/Deoliation-first or second spray

Ideal

Contitions are hot to warm (30 to 35 daytime   temperature) and the crop is ready to be defoliated with natural senescence   already occurring. Nitrogen and water are almost depleted and there is little   or no top growth. A good fruit load is set.

50- 100 ml

Apply the first spray to cotton which has been grown   under good (non-stressed) conditions and

is physiologically mature i.e., when the top   harvestable boll is mature. Application made prior to boll maturity may   result in yield and quality reductions.

• Use the lower rates of 50 to 75 mL/ha only under   warm early season conditions.

• Use the higher rate for denser canopies or to   provide a faster response.

• A second spray 7 to 10 days later of this   product or an alternative harvest aid may be required.

GOOD   Conditions are warm (25 to 30°C daytime temperature) and the crop is ready to   be defoliated. Nitrogen and water are low and there is little or no new   growth and a good fruit load is set.

100   to 150 mL

Apply   as above, but use these rates under good conditions.

AVERAGE   Conditions are: (i) warm but night temperatures are dropping to 12°C (not   below) and the crop is physiologically ready to defoliate or; (ii)   temperature is still hot/warm but the crop is not physiologically ready to   senesce.

50   to 200 mL

Apply   as above, but use these rates under good conditions.

COLD  

Night   temperatures fall below 12°C and/or mean day/night temperatures fall below   18°C.


DO   NOT apply under cold conditions.

 




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