Both chlormequat chloride and mepiquat chloride are plant growth regulators, whose duty is to promote the reproductive growth and inhibit the vegetative one.
Chlormequat chloride is an excellent plant growth regulator, also known as the Grain Upright. Commonly applied to crops such as rice, wheat, cotton, corns, tomatoes and others, it curbs the crop cells’ elongation while gears up the division, which nourishes the plant into robust dwarfs with green leaves. The stout crops are drought resistant, flood endurable and saline-alkali tolerant. It can upright lodging crops in their overgrowth prosperity. More as it can do, the chlormequat chloride busts the falling cotton bolls, depresses the flop fruits and booms the potato tubers. Being a low toxicity plant growth regulator, it can effectively restrain the vegetative growth, the growth of roots, stems and leaves while it promotes the reproductive growth of plants, the growth of flowers and fruits. Therefore, the condensed and thickened stems is strong enough to be head erected. Other benefits brought by the chlormequat chloride are the photosynthesis promotion, fruit improvement, drought resistance, cold endurance and diseases and pests withstandability. It is the antagonist of gibberellin with completely opposite effects.
Mepiquat chloride is a kind of intake plant growth regulator, which is soluble in water. It is easy to precipitate from and dissolve in its water solution under temperature changes, which does nothing harm to its effect. Mepiquat chloride is a cotton dominant one but it still works for the growth of some garden crops, such as sweet peppers, hot peppers, tomatoes, watermelons, cucumbers and grapes. It can condense the stems, thicken the leaves, boost flowers and promote fruits. Moreover, it guards against defoliation and wind-fall fruits.
In a word, being the antagonist of gibberellin to inhibit the cell elongation, both of them are expert in depressing the vegetative growth of crops, promoting the reproductive one and swelling the fruits.