Chemical substances synthesized artificially or extracted from microorganisms.
Plant growth regulators are mainly synthesized or prepared in the following two ways:
**Artificial chemical synthesis
By imitating the chemical structure of natural plant hormones (such as auxin, gibberellin, etc.), organic compounds with similar physiological activity are artificially synthesized.
For example, regulators such as chlorfenapyr and paclobutrazol are synthesized by chemical methods.
**Natural ingredients extracted from microorganisms
Some regulators are natural substances separated and extracted from microbial metabolites, but their chemical properties are similar to those of synthetic regulators.
These substances need to be purified and standardized before they can be used in agricultural production.
