What is the difference between paclobutrazol and chlormequat, which is better

Chlormequat and paclobutrazol are both plant growth regulators and both have the effect of dwarfing plants. So what is the difference between paclobutrazol and chlormequat and which is better? Let’s first understand their mechanism of action.Then we know which one is more suitable for us according to our needs.

The difference between Chlormequat and Paclobutrazol

1. Different physical and chemical properties

Chlormequat is soluble in water, but paclobutrazol is basically insoluble in water. Therefore, the chlormequat product has an aqueous solution, while the paclobutrazol is a suspension.

2. Different mechanism of action

Chlormequat's mechanism of action is mainly to inhibit the biosynthesis of gibberellin and inhibit the production of kaurene from tarba pyrophosphate, which inhibits the biosynthesis of endogenous gibberellin. Shorten the internodes of the plant without reducing the number of cellsAnd the number of internodes. So it only shortens the internodes, leaves dark green, and shortens the plant type.

Paclobutrazol is a new type of plant growth regulator that can inhibit the production of gibberellin derivatives and reduce the division and elongation of plant cells. It is easily absorbed by roots, stems and leaves, conducts through the xylem of plants, and has a bactericidal effect.. It has a wide range of activity on gramineous plants, which can make the plant stem internodes become dwarf, reduce lodging, and increase yield. Plant roots, stems and leaves can absorb paclobutrazol, but most of paclobutrazol absorbed by leaves stays in the absorption part.Transport down less.

3. Impact on field crops

The application of Chlormequat on field crops will not affect the effect of the next crop.

However, paclobutrazol has a long residual time, and the efficacy will last for 2 years at a normal temperature of 20 degrees, so it will affect the growth of the next crop, so use it with caution.

4. Different application methods

Chlormequat can be soaked, sprayed, flushed, etc., and absorbed through seeds, branches and leaves.

In contrast, paclobutrazol is basically sprayed and used more often.

5. Application scope

Chlormequat has a wide range of applications, including wheat, barley, rice, corn, sorghum, and other food crops, soybeans, sesame, cucumber, melon and other cash crops, as well as apple trees, pear trees, peach trees, jujube trees, etc.Grapesetc. It can also be used on some ornamental plants to control plant type.

The application range of paclobutrazol is relatively small.