Paclobutrazol

Paclobutrazol

Paclobutrazol Used on fruit trees to inhibit vegetative growth and to improve fruit set; on pot-grown ornamentals and flower crops (e.g. chrysanthemums, begonias, freesias, poinsettias and bulbs) to inhibit growth; on rice to increase tillering, reduce lodging, and increase yield; on turf to retard growth; and on grass seed crops to reduce height and prevent lodging.
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Product Details

Paclobutrazol (pp333)

CAS NO.: 76738-62-0

EINECS NO.:266-325-7

Formulation: 90%TC, 15%WP

Chemical name:

(2S,3S)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pentan-3-ol

Chemical Formula: C15H20ClN3O 


Molecular Weight: 293.79

Physical and Chemical Properties

A kind of white crystal, can dissolve in polarity organic solvent easily, such as ethanol, methanol and acetone etc, hard to dissolve in water(35mg/L, room temperature)melting point is 165-166℃. It is stable in room temperature.

Function Characteristics

1. Change endogenous hormones level, inhabit terminal dominance and resistant to lodging;

2. Increase the content of chlorophyllnucleinprotein, inhabit or delay fading;

3. Increase the ability of cold resistant, drought resisting and anti-bacteria.

Application

Used on fruit trees to inhibit vegetative growth and to improve fruit set; on pot-grown ornamentals and flower crops (e.g. chrysanthemums, begonias, freesias, poinsettias and bulbs) to inhibit growth; on rice to increase tillering, reduce lodging, and increase yield; on turf to retard growth; and on grass seed crops to reduce height and prevent lodging.

To be applied as a foliar spray, as a soil drench, or by trunk injection. Has some fungicidal activity against mildew and rusts.

 

 

The Usage and Dosage of Paclobutrazol Used on Different Crops

Crops

Dosage

(mg/L)

Method of use

Effects

Wheat

0.1-0.2/kg seeds

Seeds dressing in seeding stage

Increase rate of seedling emergence, rooting.

150

Spray in tillering stage

Improve tilling, increase yield.

150-200

Spray in jointing   stage

Control overgrowth, improve logging-resistant

Rice

150-180

Spray in seedling   stage

Improve rooting and tilling

200-300

Spray in jointing   stage

Control overgrowth, improve logging-resistant

Later rice in second season

300

Spray in seedling   stage

Improve rooting and tilling

Peanut

150-180

Spray once in full-blooming stage and needling stage respectively

Control overgrowth, increase yield.

Soybean

100-200

Spray in early   florescence stage

Control overgrowth, increase yield.

Edible rape

200

Spray in trefoil stage

 

Improve root and stem thick and strong

Potato

250-300

Spray when plant height 25-30cm

Improve tuber stem expanding

Tomato

10-20

Spray when 5-6 true leaves

Seedling growth better

pepper

10-20

Spray when seedling 6-7 cm

Seedling growth better

Chinese cabbage

50-100

Spray spear leaf in   later stage of growth

Control bolting

 

 Cabbage

50-75

Spray in 2-leaf stage

 

Seedling growth better

Apple, pear,

peach

0.2g/plant

When or before sprouting in spring apply to soil

Control shoot and improve fruit growth

500

Spray before new shoot fast growth

1%-5%

Smear tree stem  before new shoot fast growth

Grape

2-3g/plant

before sprouting  apply to soil

Control shoot and improve fruit growth

1500

Smear tree stem  before new shoot fast growth

Orange

0.01g/plant

before summer shoot  apply to soil

Control shoot and improve fruit growth

0.1g/plant

before fall shoot  apply to soil

500

before new shoot  apply to soil

 


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