Paclobutrazol is a plant growth regulator that has multiple functions such as delaying plant growth, promoting tillering and increasing plant stress resistance. In rapeseed cultivation, the rational use of paclobutrazol can not only effectively improve the resistance of rapeseed to lodging, but also significantly improve the yield and quality of rapeseed.

Cotton plant growth regulators are classified into categories such as stress resistance, rooting, inhibition and promotion of growth, drying and defoliation, and synergists. They are used both alone and in combination.

Thidiazuron (TDZ) is a compound with special plant growth regulating effects.Thidiazuron (TDZ) is used for cotton defoliation and ripening. It is absorbed through cotton leaves, affecting the three main plant hormones in plants - ethylene, auxin and cytokinin, promoting the formation of natural abscission layer between stems and petioles of cotton, leading to cotton leaf fall.

The first is to promote crop growth, such as Gibberellic Acid GA3, Naphthalene acetic acid (NAA), etc. can stimulate the growth of plant stems and leaves, early bolting and flowering, promote the development of crop seeds, roots, stems, etc., stimulate fruit growth, and increase fruiting rate.
The second is to inhibit crop growth, such as Chlormequat Chloride (CCC), Paclobutrazol (Paclo), etc., which can inhibit crop leggy growth, promote tillering and root development, resist lodging and salt-alkali resistance, etc.